Stow Marine Sanitation System SDP 2 User Manual

OPERATION AND PARTS MANUAL  
MODEL  
SDP-2/SDP-3  
DIAPHRAGM PUMPS  
Revision #2 (11/16/03)  
STOWCONSTRUCTIONEQUIPMENT  
A DIVISION OF MULTIQUIP INC.  
POST OFFICE BOX 6254  
PARTS DEPARTMENT:  
800-427-1244  
FAX: 800-672-7877  
SERVICE DEPARTMENT/TECHNICAL ASSISTANCE:  
800-478-1244  
CARSON, CA 90749  
310-537-3700 • 888-252-STOW [888-252-7869]  
FAX:310-537-1986 • FAX:800-556-1986  
E-MAIL: stow@multiquip.com • WWW: stowmfg.com  
FAX:310-631-5032  
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HERE'S HOW TO GET HELP  
PLEASE HAVE THE MODEL AND SERIAL  
NUMBER ON-HAND WHEN CALLING  
PARTSDEPARTMENT  
800-427-1244  
310-537-3700  
FAX: 800-672-7877  
FAX: 310-637-3284  
SERVICEDEPARTMENT  
800-478-1244  
310-537-3700  
FAX: 310-537-4259  
TECHNICALASSISTANCE  
800-478-1244  
FAX: 310-631-5032  
WARRANTYDEPARTMENT  
800-421-1244, EXT. 279 FAX: 310-537-1173  
310-537-3700, EXT. 279  
SALESDEPARTMENT  
310-661-4242  
FAX: 310-604-9237  
877-289-7869 (877-BUY-STOW)  
STOW SDP-2 / SDP-3 DIAPHRAGM PUMP — PARTS MANUAL— REV. #2 (12/16/03) — PAGE 3  
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STOW SDP-2/SDP-3 — TABLE OF CONTENTS  
HONDAGX120K1QX2 Engine  
Air Cleaner Assembly......................................... 40-41  
Camshaft Assembly ........................................... 42-43  
Carburetor Assembly ......................................... 44-45  
STOW SDP-2/SDP-3  
Gasoline Powered  
Diaphragm Pumps  
Here’s How To Get Help ............................................ 2  
Table of Contents ...................................................... 3  
Parts Ordering Procedures .................................... 4-5  
Specifications (Pump/Engine) ....................................6  
Pump Dimensions ......................................................7  
Safety Message Alert Symbols .............................. 8-9  
Rules For Safe Operation .................................. 10-11  
General Information .................................................12  
Pump Components ..................................................13  
Basic Engine ............................................................14  
Pre-Inspection (Engine) ...........................................15  
Pre-Set-up (Pump)............................................. 16-17  
Initial Start-up (Engine) ...................................... 18-19  
Maintenance (Pump) ......................................... 20-22  
Maintenance (Engine)........................................ 23-24  
Preparation for Long-Term Storage .........................25  
Troubleshooting (Pump)...........................................26  
Troubleshooting (Pump/Engine) ..............................27  
Explanation Of Code In Remarks Column ...............28  
Suggested Spare Parts ............................................29  
Control Assembly ............................................... 46-47  
Crankcase Cover Assembly............................... 48-49  
Crankshaft Assembly ......................................... 50-51  
Cylinder Barrel Assembly................................... 52-53  
Cylinder Head Assembly.................................... 54-55  
Fan Cover Assembly .......................................... 56-57  
Flywheel Assembly ............................................ 58-59  
Fuel Tank Assembly ........................................... 60-61  
Ignition Coil Assembly ........................................ 62-63  
Muffler Assembly ............................................... 64-65  
Piston Assembly................................................. 66-67  
Recoil Starter Assembly..................................... 68-69  
Gasket Kit Assembly .......................................... 70-71  
Labels ................................................................ 72-73  
Terms and Condition Of Sale  
Parts .................... 74  
ComponentDrawings  
Water Box and Groove Assy. (2-inch) ................ 30-31  
Pump Assy. (2-inch) ........................................... 32-33  
Water Box and Groove Assy. (3-inch) ................ 34-35  
Pump Assy. (3-inch) ........................................... 36-37  
Axle, Handle, Engine Mtg. and Bumper Assy. ... 38-39  
As a continuing effort to update  
our parts book, contact the  
STOW literature department for  
the latest revision of your  
"Operation and Parts Manual"  
Specification and part number  
NOTE  
are subject to change without  
notice.  
PAGE 4 — STOW SDP-2 / SDP-3 DIAPHRAGM PUMP — PARTS MANUAL — REV. #2 (12/16/03)  
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PARTS ORDERING PROCEDURES  
When ordering parts,  
please supply the following information:  
Dealeraccountnumber  
Dealernameandaddress  
Shipping address (if different than billing address)  
Returnfaxnumber  
Applicable model number  
Quantity,part number and description of each part  
Specifypreferredmethodofshipment:  
FedEx or UPS Ground  
FedEx or UPS Second Day or Third Day  
FedEx or UPS Next Day  
Federal Express Priority One  
DHL  
Note:Unlessotherwiseindicatedbycustomer, all  
orders are treated as “Standard Orders”, and will  
ship within 24 hours.We will make every effort to  
ship “Air Shipments” the same day that the order is  
received, if prior to 2PM west coast time. “Stock  
Orders” must be so noted on fax or web forms.  
Truck  
Place Your Parts Order Via Web or Fax  
For Even More Savings!  
Here’s how to get help...  
Please have the model and serial number on  
hand when calling.  
Parts Department  
Extra Discounts!  
800-427-1244  
310-537-3700  
Fax:800-672-7877  
Fax:310-637-3284  
All parts orders which include complete part numbers  
and are received by our automated web parts order  
system, or by fax qualify for the following extra  
discounts:  
Service Department  
800-478-1244  
310-537-3700  
Fax:310-537-4259  
Ordered  
via  
Standard  
orders  
Stock orders  
($750 list and above)  
Technical Assistance  
800-478-1244  
Fax  
3%  
5%  
10%  
10%  
Fax:310-631-5032  
Fax:310-537-1173  
Web  
Warranty Department  
800-421-1244, Ext. 279  
310-537-3700, Ext. 279  
Special freight allowances  
when you order 10 or more  
line items via Web or Fax!**  
FedEx Ground Service at no charge for freight  
Sales Department  
310-661-4242  
877-289-7869 (877-BUY-STOW)  
Fax:310-604-9237  
No other allowances on freight shipped by any other  
carrier.  
NOTE:DISCOUNTSARESUBJECTTOCHANGE  
STOWCONSTRUCTIONEQUIPMENT  
A DIVISION OF MULTIQUIP INC.  
POST OFFICE BOX 6254  
Direct TOLL-FREE access  
to our Parts Department:  
Toll-free nationwide — 800-427-1244  
CARSON, CA 90749  
310-537-3700 • 888-252-STOW [888-252-7869]  
FAX:310-537-1986 • FAX:800-556-1986  
E-MAIL: stow@multiquip.com • WWW: stowmfg.com  
STOW SDP-2 / SDP-3 DIAPHRAGM PUMP — PARTS MANUAL— REV. #2 (12/16/03) — PAGE 5  
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STOW SDP-2/SDP-3 — SPECIFICATIONS (PUMP/ENGINE)  
Table 1. Specifications (Pump)  
Type  
SDP-2 Diaphragm Pump  
SDP-3 Diaphragm Pump  
Suction & Discharge  
Size  
2.00 in. (50.8 mm.)  
3.00 in. (76.2 mm.)  
Maximum Pumping  
Capacity  
3,000 gallons/hour  
(11,340 liters/hour)  
5,100 gallons/hour  
(19,320 liters/hour)  
Pump  
Max. Soilds Diameter  
Max Lift  
1 in. (25.4 mm)  
26 ft. (7.92 meters)  
51 ft. (15.54 meters)  
140 lbs. (63 Kg.)  
2 in (50.8 mm)  
26 ft. (7.92 meters)  
51 ft. (15.54 meters)  
160 lbs. (72 Kg.)  
Max. Head  
Dry Net Weight  
Table 2. Specifications (Engine)  
Model  
HONDA GX120K1QX2  
Air-cooled 4 stroke, Single  
Cylinder, OHV, Horizontal  
Shaft Gasoline Engine  
Type  
2.4 in. x 1.7 in.  
(60 mm x 42 mm)  
Bore X Stroke  
Displacement  
Max Output  
119 cc (7.2 cu-in)  
4.0 H.P./3600 R.P.M.  
0.66 US gal. (2.5 liters)  
Engine  
Fuel Tank Capacity  
Unleaded Automobile  
Gasoline  
Fuel  
Lube Oil Capacity  
.60 liters (0.63 qts)  
Centrifugal Fly-weight Type  
Recoil Start  
Speed Control  
Method  
Starting Method  
11.7 x 13.4 x 12.5 in.  
(297 x 341 x 318 mm)  
Dimension  
(L x W x H)  
Dry  
Net Weight  
28.7 lbs (13 Kg.)  
PAGE 6 — STOW SDP-2 / SDP-3 DIAPHRAGM PUMP — PARTS MANUAL — REV. #2 (12/16/03)  
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STOW SDP-2/SDP-3 — DIMENSIONS (PUMP)  
Figure 1. STOW SDP-2/SDP-3 Pump Dimensions  
Table 3. Dimensions  
A
B
C
D
E
MODEL  
SDP-2  
SDP-3  
LENGTH  
HEIGHT  
WIDTH  
DISCHARGE  
SUCTION  
39.87 in.  
(101.1 cm.)  
24.75 in.  
(62.86 cm.)  
24.75 in.  
(62.86 cm.)  
4.93 in.  
(12.52 cm.)  
4.25 in.  
(10.80 cm.)  
39.87 in.  
(101.1 cm.)  
23.68 in.  
(60.14 cm.)  
29.25 in.  
(74.30 cm.)  
5.25 in.  
(13.33 cm.)  
5.43 in.  
(13.80 cm.)  
STOW SDP-2 / SDP-3 DIAPHRAGM PUMP — PARTS MANUAL— REV. #2 (12/16/03) — PAGE 7  
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STOW SDP-2/SDP-3 — SAFETY MESSAGE ALERT SYMBOLS  
FORYOUR SAFETY ANDTHE SAFETY OF OTHERS!  
HAZARD SYMBOLS  
Safety precautions should be followed at all times when operating  
this equipment. Failure to read and understand the Safety  
Messages and Operating Instructions could result in injury to  
yourself and others.  
Lethal Exhaust Gases  
Engine exhaust gases contain poisonous  
This Owner's Manual has been  
developed to provide complete  
instructions for the safe and  
carbon monoxide. This gas is colorless and  
odorless, and can cause death if inhaled.  
NEVER operate this equipment in a confined  
area or enclosed structure that does not  
provide ample free flow air.  
efficient operation of the STOW  
Model SDP-2 and SDP-3  
Diaphragm Pumps. Refer to the  
engine manufacturers instructions  
for data relative to its safe  
operation.  
Explosive Fuel  
Before using these pumps, ensure that the operating  
individual has read and understands all instructions in this  
manual.  
GASOLINE is extremely flammable, and its  
vapors can cause an explosion if ignited. DO  
NOT start the engine near spilled fuel or  
combustible fluids. DO NOT fill the fuel tank  
while the engine is running or hot. DO NOT  
overfill tank, since spilled fuel could ignite if it  
comes into contact with hot engine parts or  
sparks from the ignition system. Store fuel in  
approved containers, in well-ventilated areas  
and away from sparks and flames. NEVER  
SAFETY MESSAGE ALERT SYMBOLS  
The three (3) Safety Messages shown below will inform you  
about potential hazards that could injure you or others. The  
Safety Messages specifically address the level of exposure to  
the operator, and are preceded by one of three words: DANGER,  
WARNING, or CAUTION.  
Burn Hazards  
DANGER: You WILL be KILLED or  
SERIOUSLY injured if you do not follow  
Engine components can generate extreme heat.  
To prevent burns, DO NOT touch these areas  
while the engine is running or immediately after  
operations. Never operate the engine with heat  
shields or heat guards removed.  
WARNING: You CAN be KILLED or  
SERIOUSLY injured if you do not follow  
directions.  
Rotating Parts  
CAUTION: You CAN be injured if you  
do not follow directions.  
NEVER operate equipment with covers, or  
guards removed. Keep fingers, hands, hair and  
clothing away from all moving parts to prevent  
injury.  
Potential hazards associated with the STOW SDP-2/SDP-3  
diaphragm pumps operation will be referenced with Hazard  
Symbols which appear throughout this manual, and will be  
referenced in conjunction with Safety Message Alert Symbols.  
PAGE 8 — STOW SDP-2 / SDP-3 DIAPHRAGM PUMP — PARTS MANUAL — REV. #2 (12/16/03)  
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STOW SDP-2/SDP-3 — SAFETY MESSAGE ALERT SYMBOLS  
Accidental Starting  
Respiratory Hazard  
ALWAYS place the engine ON/OFF switch in  
the OFF position when the pump is not in use.  
ALWAYS wear approved respiratory  
protection.  
Equipment Damage Messages  
Sight and Hearing hazard  
Other important messages are provided throughout this manual  
to help prevent damage to your pump, other property, or the  
surrounding environment.  
ALWAYS wear approved eye and hearing  
protection.  
This pump, other property, or the  
surrounding environment could be  
damaged if you do not follow  
instructions.  
WARNING  
To avoid injuries and damage to the  
equipment, ALWAYS read and understand  
contents of operation manual before operating  
equipment.  
STOW SDP-2 / SDP-3 DIAPHRAGM PUMP — PARTS MANUAL— REV. #2 (12/16/03) — PAGE 9  
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STOW SDP-2/SDP-3 — RULES FOR SAFE OPERATION  
NEVER touch the hot exhaust manifold,  
muffler or cylinder.Allow these parts to  
DANGER:  
Failure to follow instructions in this manual may  
lead to serious injury or even death! This  
equipment is to be operated by trained and  
qualified personnel only!This equipment is for  
industrial use only.  
The following safety guidelines should always be used when  
operating the Diaphragm Pump:  
HighTemperatures – Allow the engine to cool before adding  
fuel or performing service and maintenance functions. Contact  
with hot components can cause serious burns.  
GENERAL SAFETY  
DO NOT operate or service this equipment before  
readingthisentiremanual.  
The engine of this pump requires an adequate free flow of  
cooling air. NEVER! operate the pump in any enclosed or  
narrow area where free flow of the air is restricted. If the air  
flow is restricted it will cause  
This equipment should not be operated by  
persons under 18 years of age.  
NEVER operate this equipment without proper  
protective clothing, shatterproof glasses, steel-  
toed boots and other protective devices required  
by the job.  
serious damage to the  
pump or engine and may  
cause injury to people and  
property. Remember the  
pump's engine gives off  
DEADLY gases.  
NEVER operate this equipment when not feeling  
well due to fatigue, illness or taking medicine.  
ALWAYS refuel in a well-ventilated area, away from sparks  
and open flames.  
NEVER operate this equipment under the  
influence or drugs or alcohol.  
ALWAYS use extreme caution when working with flammable  
liquids. When refueling, stop the engine and allow it to cool.  
DO NOT smoke around or near the machine. Fire or explosion  
could result from fuel vapors, or if fuel is spilled on a hot  
engine.  
Whenever necessary, replace nameplate, operation and safety  
decals when they become difficult read.  
NEVER operate the pump in an explosive  
atmosphere or near combustible  
materials. An explosion or fire could result  
causing severe bodily harm or even  
death.  
ALWAYS check the machine for loosened threads or bolts  
before starting.  
ALWAYS wear proper respiratory (mask) hearing and eye  
protection equipment when operating the pump.  
Topping-off to filler port is dangerous, as it tends to spill fuel.  
Refer to the Engine Owner's Manual for engine technical  
questions or information.  
NEVER use accessories or attachments, which are not  
recommended by Multiquip for this equipment. Damage to  
the equipment and/or injury to user may result.  
Manufacturer does not assume responsibility for any accident  
due to equipment modifications.  
PAGE 10 — STOW SDP-2 / SDP-3 DIAPHRAGM PUMP — PARTS MANUAL — REV. #2 (12/16/03)  
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STOW SDP-2/SDP-3 — RULES FOR SAFE OPERATION  
NEVER Run engine without air cleaner. Severe engine  
High Temperatures – Always stop engine and allow the  
engine to cool before adding fuel, oil or performing service  
and maintenance functions. Contact with hot components can  
cause serious burns.  
damage may occur.  
ALWAYS read, understand, and follow procedures in  
Operator’s Manual before attempting to operate equipment.  
NEVER disconnect any "emergency or safety devices".  
These devices are intended for operator safety. Disconnection  
of these devices can cause severe injury, bodily harm or even  
death! Disconnection of any of these devices will void all  
warranties.  
ALWAYS be sure the operator is familiar with proper safety  
precautions and operation techniques before using pump.  
ALWAYS store equipment properly when it is not being used.  
Equipment should be stored in a clean, dry location out of the  
reach of children.  
Maintenance Safety  
NEVER leave the pump unattended, turn off engine when  
unattended.  
NEVER lubricate components or attempt service on a running  
machine.  
Unauthorized equipment modifications will void all  
warranties.  
ALWAYS allow the machine a proper amount of time to cool  
before servicing.  
NEVER pump volatile, explosive, flammable or low flash point  
fluids.These fluids could ignite or explode.  
Keep the machinery in proper running condition.  
Fix damage to the machine immediately and always replace  
broken parts, or missing decals.  
NEVER operate the pump in an explosive atmosphere.  
Before starting the pump, check that the clean-out cover is  
securely fasten.  
Dispose of hazardous waste properly.Examples of potentially  
hazardous waste are used motor oil, fuel and fuel filters.  
ALWAYS ensure pump is on level ground before use.  
DO NOT use food or plastic containers to dispose of  
hazardous waste.  
Become familiar with the components of the pump before  
operating.  
DO NOT pour waste, oil or fuel directly onto the ground,  
down a drain or into any water source.  
ALWAYS replace any worn or damaged warning decals.  
NEVER pump corrosive chemicals or water containing toxic  
substances. These fluids could create serious health and  
environmental hazards. Contact local authorities for  
assistance.  
Emergencies  
ALWAYS know the location of the  
nearest fire extinguisher.  
NEVER open the priming plug when pump is hot. Hot water  
inside could be pressurized much like the radiator of an  
automobile. Allow pump to cool to the touch before loosening  
plug.  
ALWAYS know the location of the nearest  
first aid kit.  
NEVER open the pump housing during operation or start the  
pump with the clean-out cover removed.The rotating impeller  
inside the pump can cut or sever objects caught in it.  
In emergencies always know the location of the  
nearest phone or keep a phone on the job site.  
Also know the phone numbers of the nearest  
ambulance, doctor and fire department. This  
information will be invaluable in the case of an  
emergency.  
NEVER block or restrict flow from discharge hose. Remove  
kinks from discharge line before starting pump. Operation  
with a blocked discharge line can cause water inside pump  
to overheat.  
ALWAYS fill the pump casing with water before starting the  
engine. Failure to maintain water inside the pump housing  
will cause severe damage to the pump.  
In winter drain water from pump housing to prevent freezing.  
STOW SDP-2 / SDP-3 DIAPHRAGM PUMP — PARTS MANUAL— REV. #2 (12/16/03) — PAGE 11  
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STOW SDP-2/SDP-3 — GENERAL INFORMATION  
Elevation  
APPLICATION  
Higher elevations will effect the performance of the pump. Due to  
less atmospheric pressure at higher altitudes, pumps DO NOT  
have the priming ability that they have at sea level. This is due to  
the “thinner air” or lack of oxygen at higher altitudes.  
The STOW Model SDP-2 and SDP-3 diaphragm pumps are  
designed to be used for de-watering applications. The suction  
and discharge ports on the SDP-2 use a 2-inch diameter opening,  
which allows the pump to pump at rate of approximately 3,000  
gallons/hour (gph) or 11,340 liters/hour (lph). The suction and  
discharge ports on the SDP-3 use a 3-inch diameter opening,  
which allows the pump to pump at rate of approximately 5,100  
gallons/hour (gph) or 19,320 liters/hour (lph).  
A general rule of thumb is that for every 1,000 feet of elevation  
above sea level a pump will lose one foot of priming ability.  
For example, in Flagstaff, Arizona where the elevation is  
approximately 7,000 feet, the pump would have a suction lift of  
only 18 feet rather than the 25 feet at sea level. Table 3 shows  
suction lift at various elevations.  
Diaphragm pumps use a positive displacement design rather  
than centrifugal force to move water through the casing. This  
means the pump will deliver a specific amount of flow per stroke,  
revolution or cycle. These pumps are commonly referred to as  
mud hogs, mud hens and mud suckers.Their names reflect their  
popularity for use in applications where shallow depths and slurry  
water render centrifugal pumps ineffective  
Table 3. Suction Lift at Various Elevations  
Altitude  
Suction Lift in Feet (Meters)  
Feet (Meters)  
Sea Level  
10.0 (3.048) 15.0 (4.572) 20.0 (6.096) 25.0 (7.620)  
8.80 (2.680) 13.2 (4.023) 17.6 (5.364) 22.0 (6.705)  
7.80 (2.377) 11.7 (3.566) 15.6 (4.754) 19.5 (5.943)  
6.90 (2.103) 10.4 (3.169) 13.8 (4.206) 17.3 (5.273)  
6.20 (1.889) 9.30 (2.834) 12.4 (3.779) 15.5 (4.724)  
Power Plant  
2,000 (610)  
4,000 (1,219)  
6,000 (1,829)  
8,000 (2,438)  
These diaphragm pumps are powered by an 4.0 horsepower air  
cooled, 4-stroke, single cylinder HONDA GX-120 gasoline engine  
that incorporates a low "Oil Alert Feature" .The drive shaft of the  
engine is coupled to an offset connecting rod that is coupled to a  
flexible diaphragm. The connecting rod alternately raises  
(expands) and lowers (contracts) the diaphragm at a rate  
between 40 and 65 strokes per minute depending on engine  
speed.  
10,000 (3,048) 5.70 (1.737) 8.60 (2.621) 11.4 (3.474) 14.3 (4.358)  
Table 4 shows percentage drops in performance as elevation  
increases.  
Oil Alert Feature  
In the event of low oil or no oil, the HONDA GX-120 engine has  
a built-in oil alarm engine shut-down feature. In the event the oil  
level is low the engine will automatically shut-down.  
Table 4. Performance Loss at Various  
Elevations  
Suction Lift  
Altitude  
Feet (Meters  
This pump is intended to be used for dewatering applications  
and is capable of suction lifts up to 25 feet at sea level. For optimal  
suction lift performance keep the suction hose or line as short as  
possible. In general always place the pump as close to the water  
as possible.  
Discharge Flow  
Discharge Head  
Sea Level  
100%  
97%  
95%  
93%  
91%  
88%  
100%  
95%  
91%  
87%  
83%  
78%  
2,000 (610)  
4,000 (1,219)  
6,000 (1,829)  
8,000 (2,438)  
10,000 (3,048)  
Pump Support  
The pump should always be placed on solid stationary ground  
in a level position.  
NEVER place the pump on soft soil. The suction hose or pipe  
connection should always be checked for tightness and leaks. A  
small suction leak in the hose or fittings could prevent the pump  
from priming.  
PAGE 12 — STOW SDP-2 / SDP-3 DIAPHRAGM PUMP — PARTS MANUAL — REV. #2 (12/16/03)  
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STOW SDP-2/SDP-3 — PUMP COMPONENTS  
Figure 2 shows a typical application using the STOW SDP-2 or SDP-3 diaphragm pump. Please note that this pump is intended for  
the removal of clean water and water containing some debris and solids. Maximum size of solids should not exceed 1 inch (25 mm)  
in diameter. DO NOT set strainer on bottom of water bed. Placing the strainer above the water bed will prevent the pump from  
drawing in excessive amount
Contact your nearest Multiquip  
dealer for quick disconnect hoses  
and fittings.  
1. Pump The STOW Mo
and 3-inch diaphragm p
general de-watering a
applications consist of cleaning out cesspools and septic  
tanks, draining slow seepage from small excavations,  
6. Suction Port – Connect either a 2-inch or 3-inch inlet  
trenches and construction sites, or pumping out industrial  
waste.  
hose to this port depending on pump model. Use two worm  
clamps to secure the hose.  
2. Fill Cap – Prior to operation, the pump casing should be  
7. Suction Hose – Connect a flexible rubber hose to the  
filled with water.Remove this cap to add water to the pump.  
suction port on the pump. Make sure that the hose lays flat  
After the initial prime, a sufficient amount of water will be  
and is not kinked. Use only recommended type suction hose.  
retained in the casing so that the operator will not need to  
Contact Multiquip parts department for ordering information  
re-prime later.  
8. Strainer Always attach a strainer to bottom side of the  
If the casing is dry or has insufficient water, the pump will  
have difficulty in priming which could lead to premature  
suction hose to prevent large objects and debris from  
entering the pump. Strainer should be positioned so that it  
mechanical seal wear thus causing damage to the pump.  
will remain completely under water.Running the pump with  
3. Discharge Port – Connect a either a 2-inch, and 3-inch  
the strainer above water for long periods can damage pump.  
discharge hose to this port depending on pump model.  
9. Transmission Oil Fill Plug – Remove this plug to add  
4. Worm Clamp – Used to secure the hose to the inlet and  
SAE 80/90 EP gear oil to the transmission.Transmission oil  
capacity is 1-1/4 pints (550 ml.).  
outlet ports on the pump. Use two clamps to secure the  
hose on the inlet side of the pump.  
10. Connecting Rod Grease Access Hole – Grease  
5. Discharge Hose – Connect a flexible rubber hose to the  
connecting rod bearing through this access hole. Grease  
connecting rod bearing every 25 hours of operation.  
discharge port on the pump. Make sure that the hose lays  
flat and is not kinked. Use only recommended type  
discharge hose. Contact Multiquip parts department for  
ordering information.  
STOW SDP-2 / SDP-3 DIAPHRAGM PUMP — PARTS MANUAL— REV. #2 (12/16/03) — PAGE 13  
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STOW SDP-2/SDP-3 — BASIC ENGINE  
Figure 3. Engine Controls and Components  
INITIAL SERVICING  
6. Choke Lever – Used in the starting of a cold engine, or in  
cold weather conditions. The choke enriches the fuel  
mixture.  
The engine (Figure 3) must be checked for proper lubrication and  
filled with fuel prior to operation. Refer to the manufacturers engine  
manual for instructions & details of operation and servicing. The  
engine shown above is a HONDA engine, operation for other  
types of engines may vary somewhat.  
7. Air Cleaner – Prevents dirt and other debris from entering  
the fuel system. Remove wing-nut on top of air filter  
cannister to gain access to filter element.  
1. Fuel Filler Cap – Remove this cap to add unleaded  
gasoline to the fuel tank. Make sure cap is tightened  
securely. DO NOT over fill.  
Operating the engine without an  
air filter, with a damaged air filter,  
or a filter in need of replacement  
will allow dirt to enter the engine,  
causing rapid engine wear.  
DANGER  
Adding fuel to the tank should be done only when  
the engine is stopped and has had an opportunity to  
cool down. In the event of a fuel spill, DO NOT attempt to start the  
engine until the fuel residue has been completely wiped up, and the  
area surrounding the engine is dry.  
8. Spark Plug – Provides spark to the ignition system. Set  
spark plug gap to 0.6 - 0.7 mm (0.028 - 0.031 inch) Clean  
spark plug once a week.  
9. Muffler Used to reduce noise and emissions.  
2. Throttle Lever – Used to adjust engine RPM speed (lever  
advanced forward SLOW, lever back toward operator  
FAST).  
WARNING  
3. Engine ON/OFF Switch – ON position permits engine  
Engine components can generate extreme heat.  
To prevent burns, DO NOT touch these areas  
starting, OFF position stops engine operations.  
4. Recoil Starter (pull rope) – Manual-starting method. Pull  
the starter grip until resistance is felt, then pull briskly and  
smoothly.  
while the engine is running or immediately after operating. NEVER  
operate the engine with the muffler removed.  
10. Fuel Tank – Holds unleaded gasoline. For additional  
5. FuelValve Lever – OPEN to let fuel flow, CLOSE to stop  
information refer to engine owner's manual.  
the flow of fuel.  
PAGE 14 — STOW SDP-2 / SDP-3 DIAPHRAGM PUMP — PARTS MANUAL — REV. #2 (12/16/03)  
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STOW SDP-2/SDP-3 — PRE-INSPECTION (ENGINE)  
3. Insertandremovethedipstickwithoutscrewingitintothefiller  
neck. Check the oil level shown on the dipstick.  
CAUTION  
NEVER operate the pump in  
a confined area or enclosed  
area structure that does not  
provide ample free flow of  
air.  
4. If the oil level is low (Figure 5), fill to the edge of the oil filler  
holewiththerecommendedoiltype(Table5).Maximum oil  
capacity is 1.16 quarts (1.1 liters)  
ALWAYS wear approved eye and hearing  
protection before operating the pump.  
Before Starting  
Figure 5. Engine Oil Dipstick (Oil Level)  
Table 5. Oil Type  
1.  
Read safety instructions at the  
beginning of manual.  
2.  
Clean the pump, removing dirt and  
dust, particularly the engine  
cooling air inlet, carburetor and air  
cleaner.  
Season  
Summer  
Spring/Fall  
Winter  
Temperature  
25°C or Higher  
25°C~10°C  
Oil Type  
SAE 10W-30  
SAE 10W-30/20  
SAE 10W-10  
3.  
4.  
5.  
Check the air filter for dirt and dust. If air filter is dirty, replace  
air filter with a new one as required.  
0°C or Lower  
Check carburetor for external dirt and dust. Clean with dry  
compressed air.  
Check fastening nuts and bolts for tightness.  
Explosive Fuel  
DANGER  
Engine Oil Check  
1.  
To check the engine oil level, place the pump on secure  
level ground with the engine stopped.  
Motor fuels are highly flammable and can be  
dangerous if mishandled. DO NOT smoke  
while refueling. DO NOT attempt to refuel the  
pump if the engine is hot! or running.  
2.  
Remove the filler dipstick from the engine oil filler hole  
(Figure 4) and wipe clean.  
Fuel Check  
1. Remove the gasoline cap located on top of fuel tank.  
2. Visually inspect to see if the fuel level is low. If fuel is low,  
replenish with unleaded fuel.  
3. When refueling, be sure to use a strainer for filtration. DO  
NOT top-off fuel. Wipe up any spilled fuel immediately!  
Figure 4. Engine Oil Dipstick (Removal)  
STOW SDP-2 / SDP-3 DIAPHRAGM PUMP — PARTS MANUAL— REV. #2 (12/16/03) — PAGE 15  
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STOW SDP-2/SDP-3 — PRE-SETUP (PUMP)  
Before Starting  
Suction and discharge hoses are  
NOTE  
1. Read safety instructions at the  
beginning of manual.  
available from Multiquip. Contact  
your nearest dealer for more  
information.  
2. Place pump as near to water as  
possible,onafirmflat,levelsurface.  
5. The discharge hose is usually a collapsible (thin-walled)  
3. Toprimepump,removefillcap(Figure2)andfillpumpcasing  
with water.If the pump casing is not filled with water before  
starting, it will not begin pumping.  
hose, however if a thin-walled discharge hose is not avail-  
able, a rigid suction hose can be substituted in its place.  
6. Make sure the suction strainer (Figure 2) is clean and  
securely attached to the water end of the suction hose. The  
strainer is designed to protect the pump by preventing large  
objects from being pulled into the pump.  
CAUTION :  
Pump casing must be filled with water  
before using pump. Otherwise pump will not  
be able to begin pumping.  
CAUTION :  
The strainer should be positioned so it will  
remain completely under water. Running the  
pump with the strainer above water for long  
periods can damage the pump.  
WARNING :  
DO NOT open fill cap if pump is hot! Water  
inside may be under pressure.  
CAUTION :  
DO NOT pump flammable fluids, corrosive chemicals or fluids  
containing toxic substances. These fluids can create potentially  
dangerous health and environmental hazards. Contact local  
authorities for assistance.  
4. Checkforleaksbetweenpumpandengine.Ifwaterisleaking  
between the pump and engine housing, the seal inside the  
pumpmaybewornordamaged.Continued operationofthe  
pumpisnot recommended.Furtherusageofthe pumpunder  
theseconditionsmaycauseseverewaterdamagetoengine.  
Hoses and Clamps  
CAUTION :  
This pump uses a water-cooled mechanical  
seal to prevent water from seeping into the  
engine.The passage of water through the pump  
casing lubricates the seal and prevents it from  
overheating. NEVER! operate the pump without  
water in the casing as this will cause damage to the mechanical  
seal.  
1. Check that all hoses are securely attached to the pump.  
Make certain suction hose (Figure 2) does not have any air  
leakage.Tighten hose clamps and couplings as required.  
2. Itisrecommendedthat 2 clampsbeusedwhensecuringthe  
suction hose to the inlet side (suction) of the pump.  
3. Remember suction hoses must be rigid enough not to  
collapse when the pump is in operation.  
4. Check that the discharge hose (Figure 2) is not restricted.  
Place hose so that it lays as straight as it is possible on the  
ground. Remove any twists or sharp bends from hose which  
may block the flow of water.  
PAGE 16 — STOW SDP-2 / SDP-3 DIAPHRAGM PUMP — PARTS MANUAL — REV. #2 (12/16/03)  
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STOW SDP-2/SDP-3 — PRE-SETUP (PUMP)  
Connecting Rod Bearing Lubrication  
Gear Reduction Oil (Transmission)  
1. Grease connecting rod bearing thru the acess hole  
1.  
Remove the transmission oil level plug (Figure 6). If oil  
begins to seep out as the plug is being removed, then it  
can be assumed that the transmission oil is at the proper  
operating level.  
(Figure 7) every 25 hours of operation.  
2.  
Use only premium lithium based grease, conforming to  
NLG1 Grade #2 consistency.  
2.  
If oil does not seep out as the oil level plug is being removed,  
then remove the transmission oil fill plug and fill with  
SAE 80/90 EP gear oil to the proper operating level.  
Transmission oil capacity is capacity is 1-1/4 pints (590 ml.).  
Figure 7. Connecting Rod Bearing Lubrication  
Helpful Hints  
The capacity of this diaphragm pump will vary greatly depending on  
the height of the suction lift and length of the discharge hose. A  
discharge hose which is too small, long or high will cause the  
following:  
Figure 6.Transmission Oil Level  
Diaphragm pumps will handle fluids  
containing considerable solids (not to  
exceed 1.00 inch/25 mm), however, if  
the mixture is too heavy to be pumped,  
water must be added until the mixture  
becomes sufficently fluid for pumping.  
Excessive bulging of diaphragm on the down stroke.  
Valves closing with a lould snap.  
Rough operation.  
NOTE  
Engine overloads and slow downs.  
Reduced efficiency  
STOW SDP-2 / SDP-3 DIAPHRAGM PUMP — PARTS MANUAL— REV. #2 (12/16/03) — PAGE 17  
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STOW SDP-2/SDP-3 — INITIAL START-UP (ENGINE)  
4. Placethechokelever(Figure 9)inthe"CLOSED"position  
CAUTION :  
if starting a warm engine or the temperature is warm.  
DO NOT attempt to operate the pump until the Safety, General  
Information and Inspection sections of this manual have been  
read and thoroughly understood.  
This section is intended to assist the operator with the initial  
start-up of the trash pump. It is extremely important that this  
section be read carefully before attempting to use the pump in  
the field.  
Figure 11. Engine Choke Lever (Closed)  
Starting the Engine (HONDA engine)  
1. Place the engine fuel valve lever (Figure 8) to the "ON"  
5. Place the engine ON/OFF switch (Figure 12) in the "ON "  
position.  
position.  
Figure 8. Engine FuelValve Lever (ON Position)  
2. Move the throttle lever (Figure 9) away from the slow  
position, about 1/3 of the way toward the fast position.  
Figure 12. Engine ON/OFF Switch (ON Position)  
6. Grasp the starter grip (Figure 13) and slowly pull it out.The  
resistancebecomesthehardestatacertainposition,corre-  
spondingtothecompressionpoint.Pullthestartergripbriskly  
andsmoothlyforstarting.  
Figure 9. Throttle Lever (1/3 Start Position)  
3. Place thechokelever(Figure10)inthe"OPEN"positionif  
starting a cold engine.  
Figure 13. Starter Grip  
Figure 10. Engine  
Choke Lever (Open)  
PAGE 18 — STOW SDP-2 / SDP-3 DIAPHRAGM PUMP — PARTS MANUAL — REV. #2 (12/16/03)  
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STOW SDP-2/SDP-3 — INITIAL START-UP (ENGINE)  
7. If the engine has started, slowly return the choke lever Stopping The Engine  
(Figure14)totheCLOSEDposition.Iftheenginehasnot  
started repeat steps 1 through 6.  
Normal Shutdown  
1. Movethethrottlelever tothe IDLEposition (Figure16)and  
run the engine for three minutes at low speed.  
Figure 16.Throttle Lever (Idle)  
2. Aftertheenginecools,turntheengineON/OFFswitchtothe  
OFF” position (Figure 17).  
Figure 14. Choke Lever (Closed)  
8. Beforethepumpisplacedintooperation,runtheenginefor  
severalminutes. Checkfor fuelleaks,andnoisesthatwould  
associate with a lose component.  
9. To begin pumping, place the throttle lever (Figure 15) in the  
"RUN" position.  
Figure 17. Engine ON/OFF Switch (OFF)  
3. Place the fuel shut-off lever (Figure 18) in the ”OFF”  
position.  
Figure 15.Throttle Lever (Run)  
Figure 18. FuelValve Lever (OFF)  
Emergency Showdown  
1. Move the throttle lever quickly to the IDLEposition, and  
Pump speed can be regulated with  
the engine throttle control from full  
place the engine ON/OFF switch in the “OFF” position.  
volume, 65 strokes per pinute, to  
about 40 strokes per minute for  
lesser volume seepage.Smoothest  
operation can be determined by trying to pump at several speeds.  
Limit maximum speed to 65 strokes per minute of the diaphragm  
(2,800 RPM engine speed).  
STOW SDP-2 / SDP-3 DIAPHRAGM PUMP — PARTS MANUAL— REV. #2 (12/16/03) — PAGE 19  
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NOTE PAGE  
PAGE 20 — STOW SDP-2 / SDP-3 DIAPHRAGM PUMP — PARTS MANUAL — REV. #2 (12/16/03)  
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STOW SDP-2/SDP-3 — MAINTENANCE (PUMP)  
Pump Vacuum Test  
Pump Cleaning  
After pumping water containing large amounts of dirt and  
debris, perform the following:  
CAUTION:  
DO NOT attempt to start the engine unless the  
pump has previously been primed with water.  
1. Remove the drain plug from the pump housing (Figure 2)  
and drain any water left in the pump.  
Severe pump damage will occur if pump has  
not been primed.  
3. Clean and remove dirt, debris from pump casing.Inspect  
impeller and volute for wear. Replace any damaged or  
worn parts.  
To perform the pump vacuum test do the following:  
Gear Reduction Oil (Transmission)  
1. Remove the pump fill cap (Figure 2), and fill the pump  
with water.  
1.  
Change transmission oil after the first 40 hours of  
operation. Use SAE 80/90 EP gear oil. Transmission oil  
capacity is 1-1/4 pints (590 ml.). Check oil level periodically  
and change oil after every 400 hours of operation.  
2. Start the engine as outlined in the initial start-up section,  
and wait for the pump to begin pumping.  
3. As shown in Figure 19 (next page), place a water hose  
inside the discharge opening of the pump, and turn on  
the water.This flow of water into the discharge opening  
will prevent the pump from running dry.  
Connecting Rod Bearing Lubrication  
1. Grease connecting rod bearing thru the access  
hole (Figure 7) every 25 hours of operation.  
2.  
Use only premium lithium based grease, conforming to  
NLG1 Grade #2 consistency.  
4. Place the Pump Vacuum Tester (P/N 7000030) over  
the pump suction (inlet) opening (Figure 19) with the  
vacuum gauge facing upwards. It may be necessary to  
apply a small amount of water around the rubber seal of  
the vacuum tester to make a good suction fit.  
Connecting Rod Bearing Lubrication  
1. Keep interior of pump and valves clean. Flush out  
pump with clear water after operation.  
2. Remove connecting rod guard occasionally and wipe  
up excess grease from connecting rod bearing.  
5. Check and make sure that there are no air leaks between  
the vacuum tester and the inlet port on the pump. If air  
leaks are present reseat vacuum tester.  
6. Run the pump for a few minutes while monitoring the  
vacuum gauge. If the gauge indicates a reading between  
-25 and -20 in. Hg. (inches of mercury) then it can be  
assumed that the pump is working correctly.  
25 in. Hg (inches of mercury)  
translates into 25 feet of lift at sea  
level.  
7. If the vacuum tester gauge indicates a reading  
below -20 in. Hg, it can then be assumed that the pump  
is not functioning correctly, and corrective action needs  
to be taken.  
6. To test the flapper valve, shut down the engine. The  
vacuum tester should remain attached to the pump  
suction inlet port by vacuum. This indicates the pump's  
flapper valve is seating properly to hold water in the  
suction hose when the engine is stopped.This prevents  
backflow and allows for faster priming when the engine  
is restarted.  
STOW SDP-2 / SDP-3 DIAPHRAGM PUMP — PARTS MANUAL— REV. #2 (12/16/03) — PAGE 21  
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STOW SDP-2/SDP-3 — MAINTENANCE (PUMP)  
Pressure reading may vary depending on  
altitude. See Tables 3 and 4 on page 12.  
Figure 19. PumpVacuumTester  
PAGE 22 — STOW SDP-2 / SDP-3 DIAPHRAGM PUMP — PARTS MANUAL — REV. #2 (12/16/03)  
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STOW SDP-2/SDP-3 — MAINTENANCE (ENGINE)  
Engine Maintenance  
Perform engine maintenance procedures as referenced by  
Table 6 below:  
Table 6. Engine Maintenance Schedule  
FIRST  
EVERY  
EVERY  
EVERY  
YEAR  
OR  
EVERY  
2 YEARS  
OR  
MONTH 3 MONTHS 6 MONTHS  
OR  
DESCRIPTION (3)  
OPERATION  
BEFORE  
OR  
OR  
10 HRS.  
25 HRS.  
50 HRS.  
100 HRS.  
200 HRS.  
CHECK  
CHANGE  
CHECK  
X
Engine Oil  
X
X
X
Air Cleaner  
All Nuts & Bolts  
Spark Plug  
CHANGE  
X (1)  
Re-tighten If  
Necessary  
CHECK-CLEAN  
REPLACE  
CHECK  
X
X
X
Cooling Fins  
Spark Arrester  
Fuel Tank  
CLEAN  
X
X
CLEAN  
Fuel Filter  
CHECK  
X
Idle Speed  
CHECK-ADJUST  
CHECK-ADJUST  
CHECK  
X (2)  
Valve Clearance  
Fuel lines  
X (2)  
Every 2 years (replace if necessary) (2)  
(1) Service more frequently when used in DUSTY areas.  
(2) These items should be serviced by your servic dealer, unless you have the proper tools and are mechanically  
proficient. Refer to the HONDA shop Manual for service procedures  
(3) For commercial use, log hours of operation to determine proper maintenance intervals.  
Reference manufacturer engine  
manual for specific servicing  
instructions.  
STOW SDP-2 / SDP-3 DIAPHRAGM PUMP — PARTS MANUAL— REV. #2 (12/16/03) — PAGE 23  
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STOW SDP-2/SDP-3 — MAINTENANCE (ENGINE)  
DANGER :  
Maintenance  
Performtheenginemaintenanceproceduresasindicatedbelow:  
DO NOT use gasoline as a cleaning solvent,  
because that would create a risk of fire or  
explosion.  
DAILY  
Thoroughly remove dirt and oil from the engine and control  
area.Clean or replace the air cleaner elements as necessary.  
Check and retighten all fasteners as necessary. Check the  
spring box and bellows for oil leaks. Repair or replace as  
needed.  
ENGINEAIRCLEANER  
1. Remove the air cleaner cover and foam filter element as  
shown in Figure 22.  
WEEKLY  
Remove the fuel filter cap and clean the inside of the fuel  
tank.  
2. Tap the paper filter element (Figure 22) several times on a  
hard surface to remove dirt, or blow compressed air [not  
exceeding 30 psi (207 kPa, 2.1 kgf/cm2)] through the filter  
elementfromtheaircleanercaseside.NEVER brushoffdirt.  
Brushingwillforcedirtintothefibers.Replacethepaperfilter  
element if it is excessively dirty.  
Remove or clean the filter at the bottom of the tank.  
Remove and clean the spark plug (Figure 20), then adjust  
the spark gap to 0.028 ~0.031 inch (0.6~0.7 mm).This unit  
has electronic ignition, which requires no adjustments.  
3. Cleanfoamelementinwarm,soapywaterornonflammable  
solvent. Rinseanddrythoroughly. Diptheelementinclean  
engineoilandcompletelysqueezeouttheexcessoilfromthe  
element before installing.  
Figure 20. Spark Plug Gap  
ENGINEOIL  
1. Drain the engine oil when the oil is warm as shown in  
Figure 21.  
2. Remove the oil drain bolt and sealing washer and allow  
the oil to drain into a suitable container.  
3. Replace engine oil with recommended type oil as listed  
in Table 5. Engine oil capacity is 1.16 quarts (1.1 liters).  
DO NOT overfill.  
4. Install drain bolt with sealing washer and tighten se-  
curely.  
Figure 22. Engine Air Cleaner  
Figure 21. Engine Oil (Draining)  
PAGE 24 — STOW SDP-2 / SDP-3 DIAPHRAGM PUMP — PARTS MANUAL — REV. #2 (12/16/03)  
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STOW SDP-2/SDP-3 — PREPARATION FOR LONG -TERM STORAGE  
Pump Storage  
For storage of the pump for over 30 days, the following is  
required:  
z
z
z
Drain the fuel tank completely.  
Run the engine until the fuel is completely consumed.  
Completely drain used oil from the engine crankcase  
and fill with fresh clean oil, then follow the procedures  
described in the engine manual for engine storage.  
z
Remove the pump cover and clean inside of pump  
housing. Coat inside of pump housing with a light film of  
oil to reduce corrosion. A spray can of oil works well for  
this application.  
z
z
z
Cover suction and discharge ports with duct tape to  
prevent any foreign matter from falling into pump.  
Cover pump and engine with plastic covering or  
equivalent and store in a clean, dry place.  
To protect the water cooled-seals, place one-half pint of  
lubricating oil (new or used) through the discharge opening  
on the pump and crank the engine several times. This  
will prevent excessive corrosion and also keep the  
mechanical seal lubricated.  
STOW SDP-2 / SDP-3 DIAPHRAGM PUMP — PARTS MANUAL— REV. #2 (12/16/03) — PAGE 25  
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STOW SDP-2/SDP-3 — TROUBLESHOOTING (ENGINE)  
TABLE 7. ENGINE TROUBLESHOOTING  
SYMPTOM  
Difficult to start  
POSSIBLE PROBLEM  
SOLUTION  
Ignition plug being bridge?  
Carbon deposit at ignition?  
Check ignition system.  
Clean or replace ignition.  
Replace insulators.  
Fuel is available but spark plug  
will not ignite. (Power available  
at high tension cable).  
Short circuit due to defective  
insulators?  
Improper spark gap?  
Set spark plug gap to the correct gap.  
Check stop switch circuit. Replace stop switch if defective.  
Replace ignition coil.  
Short circuit at stop switch?  
Ignition coil defective?  
Fuel is available but spark plug  
will not ignite. (Power NOT  
available at high tension cable).  
Muffler clogged with carbon  
deposits?  
Clean or replace muffler.  
Mixed fuel quality is  
inadequate?  
Check fuel to oil mixture.  
Fuel is available and spark plug  
ignites (compression normal).  
Fuel in use inadequate (water,  
dust)?  
Flush fuel sytem and replace with fresh fuel.  
Air Cleaner clogged?  
Defective cylinder head gasket?  
Cylinder worn?  
Clean or replace air cleaner.  
Tighten cylinder head bolts or replace head gasket.  
Replace cylinder.  
Fuel is available and spark plug  
ignites (compression low ).  
Spark plug loose?  
Tighen spark plug.  
Operation not satisfactory  
Air cleaner clogged?  
Air in fuel line?  
Clean or replace air cleaner.  
Bleed (remove air) from fuel line.  
Not enough power available  
(compression normal, no miss-  
firing).  
Fuel level in carbureator float  
chamber improper?  
Adjust carbureator float  
Carbon deposits in cylinder?  
Ignition coil defective?  
Clean or replace cylinder  
Flush fuel sytem and replace with fresh fuel.  
Replace ignition wires, clean ignition.  
Flush fuel sytem and replace with fresh fuel.  
Not enough power available  
(compression normal, miss-  
firing).  
Ignition plug often shorts?  
Fuel in use inadequate (water,  
dust)?  
Excessive carbon depostion in  
combustion chamber?  
Clean or replace crankcase.  
Clean or replace muffler.  
Engine overheats.  
Exhaust or muffler clogged with  
carbon.  
Spark plug heat value incorrect? Replace spark plug with correct type spark plug.  
PAGE 26 — STOW SDP-2 / SDP-3 DIAPHRAGM PUMP — PARTS MANUAL — REV. #2 (12/16/03)  
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STOW SDP-2/SDP-3 — TROUBLESHOOTING (ENGINE/PUMP)  
TABLE 7. ENGINE TROUBLESHOOTING (Continued)  
SYMPTOM  
POSSIBLE PROBLEM  
SOLUTION  
Operation not satisfactory  
Governor adjustment improper?  
Governor spring defective?  
Fuel flow erratic?  
Adjust governor to correct lever.  
Clean or replace ignition.  
Check fuel line.  
Rotational speed fluctuates.  
Air taken in through suction  
line?  
Check suction line.  
Dust in rotating part?  
Spring spring failure?  
Clean recoil starter assembly.  
Replace sprial spring.  
Recoil starter not working  
properly.  
TABLE 8. PUMP TROUBLESHOOTING  
SYMPTOM  
POSSIBLE PROBLEM  
SOLUTION  
Not enough priming water in the housing?  
Engine speed too low?  
Add water.  
Increase throttle.  
Clean strainer.  
Strainner plugged?  
Suction hose damaged?  
Replace or repair hose, and clamps  
Check that fittings are tight and properly sealed.  
Move pump closer to water.  
Air leak at suction port?  
Pump is located too high above water line?  
Debris collecting in pump housing?  
Pump does not take on water.  
Clean pump housing.  
Water leaking out weep hole between pump and Check condition of mechanical seal and gaskets,  
engine?  
between pump end and engine housing.  
Check that valves are seated correctly. Pour water in  
in suction chamber to help seal valves.  
Valves not seated correctly?  
Pump does not prime correctly?  
Engine speed too low?  
Check diaphragm for breaks or leaks.  
Increase throttle speed.  
Clean strainer.  
Pump takes in water, little or no  
discharge.  
Suction strainer partially plugged?  
Tighten, replace or add clamp. (Keep extra seals on  
pump)  
Fittings/clamps are not sealed properly?  
Suction hose leaks at inlet.  
Hose diameter is too large?  
Pressure too high?  
Use smaller diameter hose or replace hose.  
Check pressure, add additional clamp.  
Check hose.  
Discharge hose does not stay  
on coupling.  
Hose kinked or end blocked?  
STOW SDP-2 / SDP-3 DIAPHRAGM PUMP — PARTS MANUAL— REV. #2 (12/16/03) — PAGE 27  
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STOW SDP-2/SDP-3 — EXPLANATION OF CODE IN REMARKS COLUMN  
How to read the marks and remarks used in this parts  
book.  
he contents of this catalog are  
ubject to change without notice.  
Items Found In the “Remarks” Column  
Serial Numbers-Where indicated, this indicates a serial  
number range (inclusive) where a particular part is used.  
Model Number-Where indicated, this shows that the  
corresponding part is utilized only with this specific model  
number or model number variant.  
Items Found In the “Items NumberColumn  
All parts with same symbol in the number column, , #,  
or <, belong to the same assembly or kit.  
+, %,  
*
If more than one of the same  
reference number is listed, the  
last one listed indicates newest  
(or latest) part available.  
PAGE 28 — STOW SDP-2 / SDP-3 DIAPHRAGM PUMP — PARTS MANUAL — REV. #2 (12/16/03)  
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STOW SDP-2/SDP-3 — SUGGESTED SPARE PARTS  
STOW SDP-2/SDP-3 DIAPHRAGM PUMP  
1TO 3 UNITS WITH  
HONDA GX120K1QX2 ENGINE  
Qty.  
P/N  
Description  
3 ............ 17210ZE0505 ....... ELEMENT AIR CLEANER DUAL  
3 ............ 9807955846 .......... SPARK PLUG  
1 ............ 17620ZH7023 ....... CAP, FUEL WITH GASKET  
1 ............ 28462ZH8003 ....... ROPE STARTER  
1 ............ 2022331 ................ DIAPHRAGM 2-INCH  
1 ............ SP2726TPE .......... DIAPHRAGM 3-INCH  
2 ............ 2023356 ................ FLAP VALVE 2-INCH  
2 ............ SP3311N .............. FLAP VALVE 3-INCH  
1 ............ 2023322 ................ PLUG, 2 & 3-INCH FILL  
1 ............ 2023323 ................ GASKET, 2 & 3-INCH PLUG  
1 ............ 0742304050 .......... STRAINER 2-INCH  
Part number on this Suggested  
Spare Parts List may super cede/  
replace the P/N shown in the text  
pages of this book.  
STOW SDP-2 / SDP-3 DIAPHRAGM PUMP — PARTS MANUAL— REV. #2 (12/16/03) — PAGE 29  
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STOW SDP-2 — WATERBOX & GROOVE ASSY. (2-INCH)  
WATERBOX & GROOVE ASSY. (2-INCH)  
PAGE 30 — STOW SDP-2 / SDP-3 DIAPHRAGM PUMP — PARTS MANUAL — REV. #2 (12/16/03)  
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STOW SDP-2 — WATERBOX & GROOVE ASSY. (2-INCH)  
WATERBOX & GROOVE ASSY. (2-INCH)  
NO.  
1
2
3
4
5
5A  
6
7
8
PART NO.  
SP3354A1  
SP3322  
SP3323  
SP3015  
PART NAME  
SUCTION CONN & GROOVE PIN ASSY.  
2” FILL PLUG  
QTY. REMARKS  
1
1
1
2
4
4
2
2
2
2
4
1
1
3
3
1
1
1
3
2” PLUG GASKET  
EXTRA HEAVY NIPPLE  
3/8”X1-1/2” HEX SCREW  
3/8LOCKWASHER  
1/8”X3/8” SPRING PIN  
VALVE WEIGHT  
FLAP VALVE  
VALVE BINDER  
RD. HD. MACH. SCREW #10-32X1/2”  
WATERBOX & GROOVE PIN ASSY.  
DISCHARGE CONNECTION  
STUD, 3/8”-16 X 2 UNC  
HEX NUT, 3/8”-16  
DIAPHRAGM BOTTOM  
DIAPHRAGM  
2023812  
2023800  
2021838  
2023358  
2023356  
2023357  
2021032  
SP3351A1  
SP3355A1  
2023458  
2061213  
SP3353A1  
SP2331TPE  
0742304050  
2023816  
9
10  
11  
12  
13  
13A  
14  
15  
16  
17  
STRAINER  
NUT, HEX 3/8”-16 UNC  
STOW SDP-2 / SDP-3 DIAPHRAGM PUMP — PARTS MANUAL— REV. #2 (12/16/03) — PAGE 31  
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STOW SDP-2 — PUMP ASSY. (2-INCH)  
2-INCH PUMP ASSY.  
PAGE 32 — STOW SDP-2 / SDP-3 DIAPHRAGM PUMP — PARTS MANUAL — REV. #2 (12/16/03)  
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STOW SDP-2 — PUMP ASSY. (2-INCH)  
2-INCH PUMP ASSY.  
NO.  
16  
16A  
17  
18  
19  
19A  
20  
21  
22  
23  
24  
25  
26  
27  
28  
29  
30  
31  
32  
33  
34  
35  
36  
37  
38  
39  
40  
41  
42  
43  
43A  
44  
45  
46  
47  
48  
48A  
49  
50  
51  
51A  
52  
53  
53A  
54  
63  
64  
65  
PART NO.  
2021214  
2061213  
SP3350  
2025818  
3051213  
2021200  
2023212  
SP3360  
SP3352  
2020316  
SP4864  
2020807  
SP4895  
2021232  
2021211  
2025656  
2024540  
SP4850  
2024858  
2063070  
2024853  
2025058  
2063040  
2024852  
2023417  
2023020  
2021434  
SP4851  
SP3321  
2021420  
2021402  
2061880  
2024854  
2025100  
2029106  
3051421  
2021421  
2021827  
2024859  
2025162  
2025167  
SP4856  
2025160  
2025165  
2025601  
SP3691  
2021012  
2021402  
PART NAME  
QTY. REMARKS  
SCREW, 1/2”X2-1/4” HEX, HN  
HEX NUT, 1/2” -13 UNC  
PUMP FRAME  
2
2
1
1
4
4
6
2
1
1
1
2
1
1
1
1
1
1
1
1
1
1
2
1
1
1
2
1
1
2
2
1
1
1
1
9
9
2
1
4
4
1
4
4
1
1
2
2
JAM NUT, 5/8-18 UNF  
HEX SCREW 1/2”-13 UNC X 1-3/4”  
WASHER, LOCK 1/2”  
SCREW, #10-32X3/8” FT. HD. MACH  
RETAININGWASHER  
CONNECTING ROD  
GREASE FITTING, 3/16” DRIVE TYPE STR.  
BEARING, CONNECTING ROD  
WOODRUFF KEY  
CRANK ARM  
OIL SEAL  
SCREW, HEX 1/2”X1-1/2”-13 UNC  
SCREW, SOCKET SET 5/16”X5/16” -18 UNC  
PLUG, 3/8” VENTED PIPE, PLASTIC  
CASE  
GASKET, GEAR CASE  
BEARING, BALL  
GEAR SHAFT  
GEAR, 79TOOTH  
BEARING, BALL  
PINION, 11TOOTH  
GEAR, 85 TOOTH INTERNAL  
BEARING, BALL  
PIN, 1/4”X3/4” DOWEL  
COVER  
LIFTING HOOK  
SCREW, HEX 1/4”-20 UNC X 1-1/4”  
WASHER, LOCK 1/4”  
NEEDLE BEARING  
14T PINION (3/4” BORE)  
RETAINING RING  
BEARING, BALL  
SCREW, 1/4-20” UNC X1”  
WASHER, LOCK 1/4”  
PLUG, 1/8” NPT SQ. HD. PIPE  
O-RING  
SCREW, HEX 5/16”-24 UNF X1”  
WASHER, LOCK 5/16”  
ENGINE ADAPTER  
SCREW, SOCKET HD. 5/16”-18 UNC X1”  
LOCK WASHER CSW/INTERNALTOOTH  
KEY 3/16” SQ. X 1” LG  
GUARD  
SELF TAPPING MACH. SCREWS  
WASHER, FLAT 1/4”  
STOW SDP-2 / SDP-3 DIAPHRAGM PUMP — PARTS MANUAL— REV. #2 (12/16/03) — PAGE 33  
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STOW SDP-3 — WATERBOX & GROOVE ASSY. (3-INCH)  
WATERBOX & GROOVE ASSY. (3-INCH)  
PAGE 34 — STOW SDP-2 / SDP-3 DIAPHRAGM PUMP — PARTS MANUAL — REV. #2 (12/16/03)  
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STOW SDP-3 — WATERBOX & GROOVE ASSY. (3-INCH)  
WATERBOX & GROOVE ASSY. (3-INCH)  
NO.  
1
2
3
4
5
5A  
6
7
8
PART NO.  
SP3309A1  
SP3322  
SP3323  
SP3041  
AO100500175  
2023800  
2021838  
SP3313  
SP3311N  
SP3312  
PART NAME  
PIN, SUCTION CONN & GROOVE ASSY.  
PLUG, 2” FILL  
QTY. REMARKS  
1
1
1
2
4
4
2
2
2
2
GASKET, 2” PLUG  
NIPPLE, EXTRA HEAVY  
SCREW, 1/2”-13 X 1-3/4” HX  
3/8LOCKWASHER  
PIN, 1/8”X3/8” SPRING  
VALVE WEIGHT  
FLAP VALVE  
VALVE BINDER  
9
10  
11  
12  
13  
2021032  
RD. HD. MACH. SCREW #10-32X1/2”  
PIN, WATERBOX & GROOVE ASSY.  
DISCHARGE CONNECTION  
BOLT, 1/2” X 2” CARR.  
SP3308A1  
SP3310A1  
AO200500200ZC  
1
1
3
14  
15  
16  
17  
SP3306A1  
SP2726TPE  
SP3364  
DIAPHRAGM BOTTOM  
DIAPHRAGM  
STRAINER  
1
1
1
3
2023816  
NUT, HEX 3/8”-16 UNC  
STOW SDP-2 / SDP-3 DIAPHRAGM PUMP — PARTS MANUAL— REV. #2 (12/16/03) — PAGE 35  
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STOW SDP-3 — PUMP ASSY.  
3-INCH PUMP ASSY.  
PAGE 36 — STOW SDP-2 / SDP-3 DIAPHRAGM PUMP — PARTS MANUAL — REV. #2 (12/16/03)  
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STOW SDP-3 — PUMP ASSY.  
3-INCH PUMP ASSY.  
NO.  
16  
16A  
17  
18  
19  
19A  
20  
21  
22  
23  
24  
25  
26  
27  
28  
29  
30  
31  
32  
33  
34  
35  
36  
37  
38  
39  
40  
41  
42  
43  
43A  
44  
45  
46  
47  
48  
48A  
49  
50  
51  
51A  
52  
53  
53A  
54  
63  
64  
65  
PART NO.  
2021214  
2061213  
SP4771  
OEBX  
PART NAME  
QTY. REMARKS  
SCREW, 1/2”X2-1/4” HEX, HN  
HEX NUT, 1/2” -13 UNC  
PUMP FRAME  
2
2
1
1
4
4
6
2
1
NUT, 3/4-16 UNF. JAM  
HEX SCREW 1/2”-13 UNC X 1-3/4”  
WASHER, LOCK 1/2”  
SCREW, #10-32X3/8” FT. HD. MACH  
WASHER, RETAINING  
CONNECTING ROD  
GREASE FITTING, 3/16” DRIVE TYPE STR.  
BEARING, CONNECTING ROD  
WOODRUFF KEY  
CRANK ARM  
OIL SEAL  
SCREW, HEX 1/2”X1-1/2”-13 UNC  
SCREW, SOCKET SET 5/16”X5/16” -18 UNC  
PLUG, 3/8” VENTED PIPE, PLASTIC  
CASE  
3051213  
2021200  
2023212  
SP3360  
SP3352  
2020316  
SP5581  
2020807  
SP5583  
2021232  
2021211  
2025656  
2024540  
SP4850  
2024858  
2063070  
2024853  
2025058  
2063040  
2024852  
2023417  
2023020  
2021434  
SP4851  
SP3321  
2021420  
2021402  
2061880  
2024854  
2025100  
2029106  
3051421  
2021421  
2021827  
2024859  
2025162  
2025167  
SP4856  
2025160  
2025165  
2025601  
SP3691  
DC290X19050FZ  
2021402  
1
1
2
1
1
1
1
1
1
1
1
1
1
2
1
1
1
2
1
1
2
2
1
1
1
1
9
9
2
1
4
4
1
4
4
1
1
2
2
GASKET, GEAR CASE  
BEARING, BALL  
GEAR SHAFT  
GEAR, 79TOOTH  
BEARING, BALL  
PINION, 11TOOTH  
GEAR, 85 TOOTH INTERNAL  
BEARING, BALL  
PIN, 1/4”X3/4” DOWEL  
COVER  
LIFTING HOOK  
SCREW, HEX 1/4”-20 UNC X 1-1/4”  
WASHER, LOCK 1/4”  
NEEDLE BEARING  
14T PINION (3/4” BORE)  
RETAINING RING  
BEARING, BALL  
SCREW, 1/4-20” UNC X1”  
WASHER, LOCK 1/4”  
PLUG, 1/8” NPT SQ. HD. PIPE  
O-RING  
SCREW, HEX 5/16”-24 UNF X1”  
WASHER, LOCK 5/16”  
ENGINE ADAPTER  
SCREW, SOCKET HD. 5/16”-18 UNC X1”  
LOCK WASHER CSW/INTERNALTOOTH  
KEY 3/16” SQ. X 1” LG  
GUARD  
SCREW, 10-24X1/2” SELF TAPPING  
WASHER, FLAT 1/4”  
STOW SDP-2 / SDP-3 DIAPHRAGM PUMP — PARTS MANUAL— REV. #2 (12/16/03) — PAGE 37  
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STOW SDP-2/3 — AXLE, HANDLE, ENGINE MTG. AND BUMPER ASSY.  
AXLE, HANDLE, ENGINE MOUNTING AND BUMPER ASSY.  
PAGE 38 — STOW SDP-2 / SDP-3 DIAPHRAGM PUMP — PARTS MANUAL — REV. #2 (12/16/03)  
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STOW SDP-2/3 — AXLE, HANDLE, ENGINE MTG. AND BUMPER ASSY.  
AXLE, HANDLE, ENGINE MOUNTING AND BUMPER ASSY.  
NO.  
1
PART NO.  
2020274A  
2023400  
2023161  
2023816  
2023039  
2023800  
2063816  
2023320A  
2021213  
2021200  
2025111  
2025167  
3055160  
2022676  
2023327  
2025169  
GX160K1QX2  
PART NAME  
QTY. REMARKS  
WHEELS SEMI-PNEUMATIC  
WASHER, FLAT 3/4” SAE  
COTTER PIN, 3/16” X 1-1/4” LG  
SCREW, HEX 3/8”-16 UNC X 1-1/4”  
AXLE CLAMP  
2
2
2
2
2
2
2
1
2
4
4
4
8
4
1
2
1
2
3
4
5
6
WASHER LOCK  
NUT HEX 3/8”-16 UNC  
HANDLE  
SCREW HEX 1/2”-13 UNC X 2-1/2”  
WASHER, LOCK  
NUT HEX 5/16””-18 UNC  
WASHER, LOCK 5/16”  
WASHER, FLAT 5/16”  
WASHER, SLOTTED HOLE 1/32THK  
BUMPER  
7
8
9
10  
11  
12  
13  
14  
15  
16  
17  
SCREW, HEX 5/16”-18 UNC X 2”  
HONDA ENGINE 4.0 HP  
STOW SDP-2 / SDP-3 DIAPHRAGM PUMP — PARTS MANUAL— REV. #2 (12/16/03) — PAGE 39  
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HONDA GX120K1QX2 ENGINE — AIR CLEANER ASSY.  
AIR CLEANER ASSY.  
PAGE 40 — STOW SDP-2 / SDP-3 DIAPHRAGM PUMP — PARTS MANUAL — REV. #2 (12/16/03)  
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HONDA GX120K1QX2 ENGINE — AIR CLEANER ASSY.  
AIR CLEANER ASSY.  
NO.  
1
2
3
*
4
PART NO.  
PART NAME  
QTY.  
REMARKS  
16271ZE1000  
17210ZE0505  
17218ZE0505  
17230ZE0820  
17232891000  
17238ZE0010  
17239ZE1000  
17410ZE0030  
90325044000  
957010602000  
9405006000  
GASKET, ELBOW  
1
ELEMENT, AIR CLEANER (DUAL) ................... 1.............INCLUDES ITEMS W/  
FILTER, OUTER  
COVER, AIR CLEANER (DUAL)  
GROMMET, AIR CLEANER  
COLLAR, AIR CLEANER  
COLLAR B, AIR CLEANER  
ELBOW, AIR CLEANER ................................... 1.............INCLUDES ITEMS W/  
WINGNUT, TOOL BOX SETTING  
BOLT, FLANGE 6X20  
*
1
1
1
2
1
5
*
7
8
9
#
#
#
12  
13  
14  
2
1
2
NUT, FLANGE 6MM  
STOW SDP-2 / SDP-3 DIAPHRAGM PUMP — PARTS MANUAL— REV. #2 (12/16/03) — PAGE 41  
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HONDA GX120K1QX2 ENGINE — CAMSHAFT ASSY.  
CAMSHAFT ASSY.  
PAGE 42 — STOW SDP-2 / SDP-3 DIAPHRAGM PUMP — PARTS MANUAL — REV. #2 (12/16/03)  
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HONDA GX120K1QX2 ENGINE — CAMSHAFT ASSY.  
CAMSHAFT ASSY.  
NO.  
1
2
3
4
PART NO.  
PART NAME  
QTY.  
REMARKS  
14100ZE0812  
14410ZE0010  
14431ZE1000  
14441ZE1010  
14451ZE1013  
14568ZE1000  
14711ZF0010  
14721ZF0000  
14751ZF1000  
14771ZE1000  
14773ZE1000  
14781ZE1000  
14791ZE0010  
90012ZE0010  
90206ZE1000  
CAMSHAFT ASSEMBLY.................................. 1.............INCLUDES ITEMS W/  
*
ROD, PUSH  
ARM, VALVE ROCKER  
LIFTER, VALVE  
PIVOT, ROCKER ARM  
SPRING, WEIGHT RETURN  
VALVE, IN.  
VALVE, EX.  
SPRING, VALVE  
RETAINER, IN. VALVE SPRING  
RETAINER, EX. VALVE SPRING  
ROTATOR, VALVE  
PLATE, PUSH ROD GUIDE  
BOLT, PIVOT 8MM  
2
2
2
2
1
1
1
2
1
1
1
1
2
2
5
6
*
7
8
9
10  
11  
12  
13  
14  
15  
NUT, PIVOT ADJ.  
STOW SDP-2 / SDP-3 DIAPHRAGM PUMP — PARTS MANUAL— REV. #2 (12/16/03) — PAGE 43  
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HONDA GX120K1QX2 ENGINE — CARBURETOR ASSY.  
CARBURETOR ASSY.  
PAGE 44 — STOW SDP-2 / SDP-3 DIAPHRAGM PUMP — PARTS MANUAL — REV. #2 (12/16/03)  
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HONDA GX120K1QX2 ENGINE — CARBURETOR ASSY.  
CARBURETOR ASSY.  
NO.  
PART NO.  
PART NAME  
QTY.  
REMARKS  
1
*
2
*
3
*
4
*
5
*
6
*
7
*
8
*
9
16010ZE1812  
16011ZE0005  
16013ZE0005  
16015ZE1811  
16016ZH7W01  
16024ZE1811  
16028ZE0005  
16044ZE0005  
16100ZH7W51  
16124ZE0005  
16166ZH7W50  
16173001004  
16211ZE0000  
16212ZH7800  
16220ZE1020  
16221ZH8801  
16610ZE1000  
16953ZE1812  
16954ZE1811  
16956ZE1811  
16957ZE1812  
16967ZE0811  
93500030080G  
9430520122  
GASKET SET  
1
1
1
1
1
1
1
1
VALVE SET, FLOAT  
FLOAT SET  
CHAMBER SET, FLOAT  
SCREW SET  
SCREW SET, DRAIN  
SCREW SET B  
CHOKE SET  
CARBURETOR ASSEMBLY, BE60B B............. 1.............INCLUDES ITEMS W/  
SCREW, THROTTLE STOP  
NOZZLE, MAIN  
GASKET, FUEL STRAINER CUP  
INSULATOR, CARBURETOR  
GASKET, INSULATOR  
SPACER, CARBURETOR  
GASKET, CARBURETOR  
*
10  
1
1
1
1
1
1
1
*
11  
*
12  
*
13  
14  
15  
16  
17  
LEVER, CHOKE (STANDARD) ......................... 1.............INCLUDES ITEMS W/+  
LEVER,VALVE  
18  
1
1
1
1
1
2
1
1
1
1
1
*
19  
*
PLATE, LEVER SETTING  
SPRING, VALVE LEVER  
GASKET, VALVE  
CUP, FUEL STRAINER  
SCREW, PAN (3 X 6)  
PIN, SPRING (2 X 12)  
JET, MAIN (#55) (OPTIONAL)  
JET, MAIN (#58) (OPTIONAL)  
JET, MAIN (#60)  
20  
*
21  
*
22  
*
23  
*
24  
25  
25  
25  
26  
#
99101ZH80550  
99101ZH80580  
99101ZH80600  
99204ZE00350  
*
*
JET, SET, PILOT (#35)  
STOW SDP-2 / SDP-3 DIAPHRAGM PUMP — PARTS MANUAL— REV. #2 (12/16/03) — PAGE 45  
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HONDA GX120K1QX2 ENGINE — CONTROL ASSY.  
CONTROL ASSY.  
PAGE 46 — STOW SDP-2 / SDP-3 DIAPHRAGM PUMP — PARTS MANUAL — REV. #2 (12/16/03)  
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HONDA GX120K1QX2 ENGINE — CONTROL ASSY.  
CONTROL ASSY.  
NO.  
3
4
5
6
PART NO.  
PART NAME  
QTY.  
REMARKS  
16500ZH7820  
16551ZE0010  
16555ZE0000  
16561ZE0020  
16562ZE0020  
16571ZH7000  
16574ZE1000  
16575ZH8000  
16576891000  
16578ZE1000  
16580ZH7810  
16584883300  
16592ZE1810  
90013883000  
90015ZE5010  
90022888010  
90114SA0000  
93500050250H  
93500050160A  
9405006000  
CONTROL ASSEMBLY (REMOTE) ........... 1 ............ INCLUDES ITEMS W/  
#
ARM, GOVERNOR  
ROD, GOVERNOR  
SPRING, GOVERNOR  
SPRING,THROTTLE RETURN  
LEVER, CONTROL  
SPRING, LEVER  
WASHER, CONTROL LEVER  
HOLDER, CABLE  
SPACER, CONTROL LEVER  
BASE CONTROL  
SPRING, CONTROL ADJUSTING  
SPRING, CABLE RETURN  
BOLT, FLANGE 6X12 (CT200)  
BOLT, GOVERNOR ARM  
BOLT, FLANGE 6X20 (CT200)  
NUT, SELF- LOCK 6MM  
SCREW, PAN 5X25  
1
1
1
1
1
1
1
7
8#  
#
9
10  
11  
12  
14  
15  
16  
18  
19  
20  
21  
24  
25  
26  
#
#
#
#
#
#
1
1
1
1
1
1
1
1
1
1
#
#
#
SCREW, PAN  
NUT, FLANGE 6MM  
STOW SDP-2 / SDP-3 DIAPHRAGM PUMP — PARTS MANUAL— REV. #2 (12/16/03) — PAGE 47  
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HONDA GX120K1QX2 ENGINE — CRANKCASE COVER ASSY.  
CRANKCASE COVER ASSY.  
PAGE 48 — STOW SDP-2 / SDP-3 DIAPHRAGM PUMP — PARTS MANUAL — REV. #2 (12/16/03)  
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HONDA GX120K1QX2 ENGINE — CRANKCASE COVER ASSY.  
CRANKCASE COVER ASSY.  
NO.  
1
2
PART NO.  
PART NAME  
QTY.  
REMARKS  
11300ZE0640  
11381ZH7800  
15600ZE1003  
15600ZG4003  
15625ZE1003  
15625ZE1003  
90015883000  
91001878003  
91203ZE0003  
9430108140  
COVER ASSEMBLY, CRANKCASE (W- TYPE)....... 1 ..............INCLUDES ITEMS W/  
*
#
GASKET, CASE COVER  
CAP ASSEMBLY, OIL FILLER ................................ 1 ..............INCLUDES ITEMS W/  
CAP ASSEMBLY, OIL FILLER ................................ 1 ..............INCLUDES ITEMS W/+  
GASKET, OIL FILLER CAP  
GASKET, OIL FILLER CAP  
BOLT, FLANGE 6X28  
BEARING, RADIAL BALL  
OIL SEAL 22X41X6  
1
3
4
7#  
1
1
7
1
1
2
8+  
9
10  
*
11  
12  
*
PIN A, DOWEL 8X14  
STOW SDP-2 / SDP-3 DIAPHRAGM PUMP — PARTS MANUAL— REV. #2 (12/16/03) — PAGE 49  
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HONDA GX120K1QX2 ENGINE — CRANKSHAFT ASSY.  
CRANKSHAFT ASSY.  
PAGE 50 — STOW SDP-2 / SDP-3 DIAPHRAGM PUMP — PARTS MANUAL — REV. #2 (12/16/03)  
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HONDA GX120K1QX2 ENGINE — CRANKSHAFT ASSY.  
CRANKSHAFT ASSY.  
NO.  
1
2
PART NO.  
13310ZE0601  
90745ZE1600  
PART NAME  
CRANKSHAFT, H-TYPE  
KEY 4.78 X4.78X38  
QTY.  
1
1
REMARKS  
STOW SDP-2 / SDP-3 DIAPHRAGM PUMP — PARTS MANUAL— REV. #2 (12/16/03) — PAGE 51  
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HONDA GX120K1QX2 ENGINE — CYLINDER BARREL ASSY.  
CYLINDER BARREL ASSY.  
PAGE 52 — STOW SDP-2 / SDP-3 DIAPHRAGM PUMP — PARTS MANUAL — REV. #2 (12/16/03)  
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HONDA GX120K1QX2 ENGINE — CYLINDER BARREL ASSY.  
CYLINDER BARREL ASSY.  
NO.  
2
3
PART NO.  
PART NAME  
QTY.  
REMARKS  
120A0ZH7810  
15510ZE1033  
16510ZE1000  
16511ZE1000  
16512ZE1000  
16513ZE1000  
16531ZE1000  
16541ZE1000  
90131ZE1000  
90451ZE1000  
90601ZE1000  
90602ZE1000  
91001878003  
91202ZE6003  
91353671003  
9405010000  
CYLINDER ASSEMBLY (OIL ALERT) ........1 ............ INCLUDES ITEMS W/  
*
#
SWITCH ASSEMBLY, OIL LEVEL  
GOVERNOR ASSEMBLLY .........................1 ............ INCLUDES ITEMS W/  
1
4
5#  
6#  
7#  
8
9
WEIGHT, GOVERNOR  
HOLDER, GOVERNORWEIGHT  
PIN, GOVERNOR WEIGHT  
SLIDER, GOVERNOR  
SHAFT, GOVERNOR ARM  
BOLT, DRAIN PLUG  
WASHER, THRUST 6mm  
WASHER, DRAIN PLUG 10.2mm  
CLIP, GOVERNOR HOLDER  
BEARING, RADIAL BALL 62/22  
OIL SEAL 22X35X6  
O- RING 13.5X1.5 (ARAI)  
NUT, FLANGE 10mm  
2
1
2
1
1
2
1
2
1
1
1
1
1
2
1
2
10  
11  
12  
13  
14  
15  
16  
17  
18  
19  
20  
*
*
9410106800  
9425108000  
957010601200  
WASHER, PLAIN 6mm  
PIN, LOCK 8mm  
BOLT, FLANGE 6X12  
STOW SDP-2 / SDP-3 DIAPHRAGM PUMP — PARTS MANUAL— REV. #2 (12/16/03) — PAGE 53  
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HONDA GX120K1QX2 ENGINE — CYLINDER HEAD ASSY.  
CYLINDER HEAD ASSY.  
PAGE 54 — STOW SDP-2 / SDP-3 DIAPHRAGM PUMP — PARTS MANUAL — REV. #2 (12/16/03)  
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HONDA GX120K1QX2 ENGINE — CYLINDER HEAD ASSY.  
CYLINDER HEAD ASSY.  
NO.  
PART NO.  
PART NAME  
QTY.  
REMARKS  
1
12210ZH7000  
12204ZE1306  
12205ZE1315  
12216ZE5300  
12251ZH7800  
12310ZE1000  
12310ZE1010  
12391ZE1000  
15721ZH8000  
90013883000  
90043ZE1020  
90047ZE1000  
9430110160  
CYLINDER HEAD ..................................................1.............. INCLUDES ITEMS W/  
*
2
3
GUIDE, VALVE (OS) OPTIONAL  
GUIDE, EX. VALVE (OS) OPTIONAL ................... 1.............. INCLUDES ITEMS W/+  
CLIP, VALVE GUIDE  
GASKET, CYLINDER HEAD  
COVER, HEAD  
COVER, HEAD  
GASKET, CYLINDER HEAD COVER  
TUBE, BREATHER  
BOLT, FLANGE 6X12 (CT200)  
BOLT, STUD 6X109  
1
*
*
4 +  
1
1
1
1
1
1
4
2
2
2
4
1
*
5
6
6
7
8
9
10  
11  
12  
14  
15  
BOLT, STUD 8X32  
PIN, A, DOWEL 10X16  
BOLT, FLANGE 8X55  
SPARK PLUG BPR6ES (NGK)  
957230805500  
9807955846  
STOW SDP-2 / SDP-3 DIAPHRAGM PUMP — PARTS MANUAL— REV. #2 (12/16/03) — PAGE 55  
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HONDA GX120K1QX2 ENGINE — FAN COVER ASSY.  
FAN COVER ASSY.  
PAGE 56 — STOW SDP-2 / SDP-3 DIAPHRAGM PUMP — PARTS MANUAL — REV. #2 (12/16/03)  
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HONDA GX120K1QX2 ENGINE — FAN COVER ASSY.  
FAN COVER ASSY.  
NO.  
1
2
3
4
5
6
7
7
8
9
10  
11  
13  
PART NO.  
PART NAME  
QTY.  
REMARKS  
11347371300  
19610ZE0000ZE  
19611ZH7810  
90601ZH7013  
19630ZH7000  
32197ZH8003  
36100ZE1015  
36100ZH7003  
36101ZE1010  
90013883000  
90022888010  
34150ZH7003  
957010600800  
GROMMET, ADJUSTING COVER  
COVER, FAN *NH1* BLACK  
PLATE, SIDE (OIL ALERT)  
CLIP, HARNESS  
1
1
1
1
1
1
1
1
1
6
1
1
1
SHROUD  
SUB- HARNESS  
SWITCH ASSEMBLY, ENGINE STOP  
SWITCH ASSEMBLY, ENGINE STOP  
WIRE, STOP SWITCH 370MM  
BOLT, FLANGE 6X12 (CT200)  
BOLT, FLANGE 6X12 (CT200)  
ALERT UNIT, OIL  
BOLT, FLANGE 6X8  
STOW SDP-2 / SDP-3 DIAPHRAGM PUMP — PARTS MANUAL— REV. #2 (12/16/03) — PAGE 57  
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HONDA GX120K1QX2 ENGINE — FLYWHEEL ASSY.  
FLYWHEEL ASSY.  
PAGE 58 — STOW SDP-2 / SDP-3 DIAPHRAGM PUMP — PARTS MANUAL — REV. #2 (12/16/03)  
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HONDA GX120K1QX2 ENGINE — FLYWHEEL ASSY.  
FLYWHEEL ASSY.  
NO.  
1
2
4
5
PART NO.  
PART NAME  
KEY, SPECIAL WOODRUFF 25X18  
FAN, COOLING  
PULLEY, STARTER  
FLYWHEEL  
NUT, SPECIAL 14MM  
QTY.  
REMARKS  
13331357000  
19511ZE0000  
28451ZH8003  
31100ZE0010  
90201878003  
1
1
1
1
1
7
STOW SDP-2 / SDP-3 DIAPHRAGM PUMP — PARTS MANUAL— REV. #2 (12/16/03) — PAGE 59  
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HONDA GX120K1QX2 ENGINE — FUELTANK ASSY.  
FUEL TANK ASSY.  
PAGE 60 — STOW SDP-2 / SDP-3 DIAPHRAGM PUMP — PARTS MANUAL — REV. #2 (12/16/03)  
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HONDA GX120K1QX2 ENGINE — FUELTANK ASSY.  
FUEL TANK ASSY.  
NO.  
1
2
3
5
PART NO.  
PART NAME  
RUBBER, SUPPORTER 107MM  
JOINT, FUEL TANK  
TANK, FUEL *NH1* (BLACK)  
CAP, FUEL FILLER ..................................... 1 .......... INCLUDES ITEMS W/  
GASKET, FUEL FILLER CAP  
O- RING 13.5X1.5 (ARAI)  
NUT, FLANGE 6MM  
BULK HOSE, FUEL (4.5X3000) (4.5X140)  
CLIP, TUBE (B8)  
QTY.  
REMARKS  
16854ZH8000  
16955ZE1000  
17510ZE0020ZD  
17620ZH7023  
17631ZH7003  
91353671003  
9405006000  
1
1
1
*
6
1
1
2
1
2
1
*
11  
12  
13  
14  
15  
950014500360M  
9500202080  
90004ZH7003  
BOLT, FLANGE 6X29  
STOW SDP-2 / SDP-3 DIAPHRAGM PUMP — PARTS MANUAL— REV. #2 (12/16/03) — PAGE 61  
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HONDA GX120K1QX2 ENGINE — IGNITION COIL ASSY.  
IGNITION COIL ASSY.  
PAGE 62 — STOW SDP-2 / SDP-3 DIAPHRAGM PUMP — PARTS MANUAL — REV. #2 (12/16/03)  
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HONDA GX120K1QX2 ENGINE — IGNITION COIL ASSY.  
IGNITION COIL ASSY.  
NO.  
1
2
PART NO.  
PART NAME  
QTY.  
REMARKS  
30500ZE1033  
30700ZE1013  
90121952000  
COIL ASSEMBLY, IGNITION  
CAP ASSEMBLY, NOISE SUPPRESSOR  
BOLT, FLANGE 6X25  
1
1
2
8
STOW SDP-2 / SDP-3 DIAPHRAGM PUMP — PARTS MANUAL— REV. #2 (12/16/03) — PAGE 63  
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HONDA GX120K1QX2 ENGINE — MUFFLER ASSY.  
MUFFLER ASSY.  
PAGE 64 — STOW SDP-2 / SDP-3 DIAPHRAGM PUMP — PARTS MANUAL — REV. #2 (12/16/03)  
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HONDA GX120K1QX2 ENGINE — MUFFLER ASSY.  
MUFFLER ASSY.  
NO.  
1
3
7
10  
13  
PART NO.  
PART NAME  
QTY.  
REMARKS  
18310ZF1000  
18320ZF1H01  
18381ZH8800  
90050ZE1000  
94001080000S  
MUFFLER  
1
1
1
4
2
PROTECTOR, MUFFLER  
GASKET, MUFFLER  
SCREW, TAPPING 5X8  
NUT, HEX. 8MM  
STOW SDP-2 / SDP-3 DIAPHRAGM PUMP — PARTS MANUAL— REV. #2 (12/16/03) — PAGE 65  
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HONDA GX120K1QX2 ENGINE — PISTON ASSY.  
PISTON ASSY.  
PAGE 66 — STOW SDP-2 / SDP-3 DIAPHRAGM PUMP — PARTS MANUAL — REV. #2 (12/16/03)  
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HONDA GX120K1QX2 ENGINE — PISTON ASSY.  
PISTON ASSY.  
NO.  
1
1
1
1
2
2
2
2
3
4
4
5
*
6
PART NO.  
PART NAME  
QTY. REMARKS  
13010ZK7V01  
13011ZE6013  
13012ZK7V01  
13013ZK7V01  
13101ZH7000  
13102ZH7000  
13103ZH7000  
13104ZH7000  
13111ZE0000  
132A0ZE0000  
13200ZE0000  
90001ZE1000  
90551ZE0000  
RING SET, PISTON (STANDARD)  
RING SET, PISTON (OS 0.25), OPTIONAL  
RING SET, PISTON (OS 0.50) , OPTIONAL  
RING SET, PISTON (OS 0.75), OPTIONAL  
PISTON, STANDARD  
1
1
1
1
1
1
1
1
1
PISTON, OS 0.25  
PISTON, OS 0.50  
PISTON, 0.75  
PIN, PISTON  
ROD ASSY, CONNECTING (UNDER SIZE) .... 1 ...... INCLUDES ITEMS W/  
ROD ASSEMBLY, CONNECTING.................... 1 ...... INCLUDES ITEMS W/  
BOLT, CONNECTING ROD  
CLIP, PISTON PIN 13MM  
*
*
2
2
STOW SDP-2 / SDP-3 DIAPHRAGM PUMP — PARTS MANUAL— REV. #2 (12/16/03) — PAGE 67  
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HONDA GX120K1QX2 ENGINE — RECOIL STARTER ASSY.  
RECOIL STARTER ASSY.  
PAGE 68 — STOW SDP-2 / SDP-3 DIAPHRAGM PUMP — PARTS MANUAL — REV. #2 (12/16/03)  
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HONDA GX120K1QX2 ENGINE — RECOIL STARTER ASSY.  
RECOIL STARTER ASSY.  
NO.  
PART NO.  
PART NAME  
QTY.  
REMARKS  
1
28400ZH8013ZB  
28410ZH8003ZB  
28420ZH8013  
28422ZH8013  
28433ZH8003  
28441ZH8003  
28442ZH8003  
28443ZH8003  
28461ZH8003  
28462ZH8003  
90003ZH8003  
9008ZE2003  
STARTER ASSY., RECOIL *NH1* (BLACK) .......... 1.............. INCLUDES ITEMS W/  
*
2
CASE, RECOIL STARTER *NH1* (BLACK)  
REEL, RECOIL STARTER  
RATCHET, STARTER  
GUIDE, RATCHET  
SPRING, FRICTION  
SPRING, RECOIL STARTER  
SPRING, RETURN  
KNOB, RECOIL STARTER  
ROPE, RECOIL STARTER  
SCREW, SETTING  
1
1
2
1
1
1
2
1
1
1
3
*
3
*
4
*
5
*
6
*
7
*
8
*
9
*
10  
*
11  
*
12  
BOLT, FLANGE 6X10  
STOW SDP-2 / SDP-3 DIAPHRAGM PUMP — PARTS MANUAL— REV. #2 (12/16/03) — PAGE 69  
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HONDA GX120K1QX2 ENGINE — GASKET KIT ASSY.  
GASKET KIT ASSY.  
NO ARTWORK AVALIBLE  
PAGE 70 — STOW SDP-2 / SDP-3 DIAPHRAGM PUMP — PARTS MANUAL — REV. #2 (12/16/03)  
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HONDA GX120K1QX2 ENGINE — GASKET KIT ASSY.  
GASKET KIT ASSY.  
NO.  
PART NO.  
PART NAME  
QTY.  
REMARKS  
2
06111ZH7405  
11381ZH7800  
12251ZH7800  
12391ZE1000  
16212ZH7800  
16221ZH8801  
18381ZH8800  
GASKET KIT ......................................................... 1.............. INCLUDES ITEMS W/  
*
3
*
4
*
5
*
6
*
7
*
8
*
GASKET, CASE COVER  
GASKET, CYLINDER HEAD  
GASKET, CYLINDER HEAD COVER  
GASKET, INSULATOR  
GASKET, CARBURETOR  
GASKET, MUFFLER  
1
1
1
1
1
1
STOW SDP-2 / SDP-3 DIAPHRAGM PUMP — PARTS MANUAL— REV. #2 (12/16/03) — PAGE 71  
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HONDA GX120K1QX2 ENGINE — LABELS ASSY.  
LABELS ASSY.  
PAGE 72 — STOW SDP-2 / SDP-3 DIAPHRAGM PUMP — PARTS MANUAL — REV. #2 (12/16/03)  
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HONDA GX120K1QX2 ENGINE — LABELS ASSY.  
LABELS ASSY.  
NO.  
1
3
4
6
PART NO.  
PART NAME  
QTY.  
REMARKS  
87521ZH7020  
87522ZH9000  
87528ZE1810  
87532ZH8810  
EMBLEM  
1
1
1
1
LABEL, CAUTION  
MARK, CHOKE  
MARK, OIL ALERT (E)  
STOW SDP-2 / SDP-3 DIAPHRAGM PUMP — PARTS MANUAL— REV. #2 (12/16/03) — PAGE 73  
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Effective: July 15, 2003  
TERMS AND CONDITIONS OF SALE — PARTS  
Terms and Conditions of Sale  
STOW Construction Equipment  
DROP SHIPMENTS  
PAYMENT TERMS  
Terms of payment for unit sales are 2% 15  
days net 30 days from date of invoice unless  
otherwise specifically stated on our invoice.  
Parts invoices have terms of net 10 days.  
Minimum parts billing is $15.00 net.  
Applicable discounts will be computed on  
merchandise value only. Late charges will be  
assessed at prevailing rates. Cash discounts  
cannot be taken on current billings if any  
previously billed amounts are past due.  
STOW reserves the right to refuse Drop  
Shipments outside the normal service area of  
the purchasing dealer.  
The sender will be notified of any material  
received that does not meet the above  
provisions. Such material will be held for 30  
days from notification pending instructions. If a  
reply is not received within 30 days, the material  
will be returned to the sender at his expense  
with no credit issued.  
FIELDWAREHOUSES  
Field Warehouses are currently located in  
California, Georgia, Idaho, Iowa, and New  
Jersey  
PRICING, REBATES AND  
SPECIFICATIONS  
Every effort will be made to provide adequate  
notice of changes; however, prices and  
equipment specifications are subject to change  
without notice.  
SPECIAL EXPEDITING SERVICE  
The higher of a $35.00 surcharge or actual  
costs will be added to the invoice for special  
handling, including bus shipments, or in cases  
where STOW personnel must personally deliver  
the equipment or parts to the carrier.  
FREIGHT POLICY  
Freight policy is established to offer customers  
every advantage possible. Due to bulk freight  
ratings on some equipment and other shipping  
considerations, freight policies differ by  
equipment type. Actual back freight may be  
charged for shipments originating from other  
than specified FOB warehouses. See Freight  
Policy for details.  
All STOW domestic sales are FOB nearest  
available designated MQ/STOW warehouse.  
Export orders are ex-works factory located in  
Carson, CA or Boise, ID.  
Price changes are effective on a specific date  
and all orders received on or after that date will  
be billed at the revised price.  
RETURNED GOODS POLICY  
Return shipments may be accepted and credit  
allowed, subject to the following provisions.  
Rebates for price reductions and added charges  
for price increases will not be made for stock in  
dealer inventory at the time of a price change.  
1. A Returned Material Authorization (RMA)  
must be approved by STOW prior to  
shipment. Approvals for returned goods  
must be with just cause and are at the  
sole discretion of STOW. A copy of the  
Authorization must accompany the shipment  
to the designated Warehouse.  
STOW reserves the right to quote and sell direct  
to Government agencies and to Original  
Equipment Manufacturer accounts who use our  
products as integral parts of their own products.  
Additions to orders already shipped cannot be  
accepted for freight minimums.  
LIMITATION OF SELLER’S LIABILITY  
2. Parts being returned must be listed as  
currently supplied on the current parts list.  
STOW shall not be liable hereunder for damages  
in excess of the purchase price of the item with  
respect to which damages are claimed and in  
no event shall STOW be liable for loss of profit  
or good will or for any other special, consequential  
or incidental damages.  
Should STOW elect to make partial shipments  
of an order originally complying with the “freight  
allowed” requirements, transportation charges  
will be absorbed by STOW on any subsequent  
shipment applying to that order.  
3. Parts must be in new and resalable condition  
in the original package, with part numbers  
clearly marked.  
4. Units and accessories must be current  
models in the latest price list and in new and  
resalable condition.  
All other orders will be shipped collect or prepaid  
with charges added to the invoice. STOW’s  
responsibility ceases when a signed manifest  
has been obtained from the carrier, and any  
claim for shortage or damage must be settled  
between the consignee and the carrier.  
LIMITATION OF WARRANTIES  
There are no warranties, express or implied,  
made by STOW. hereunder on Products  
manufactured or distributed by it except the  
warranty against defects in material and  
workmanship on new Products to the original  
purchaser, as set forth in the STOW New  
Product Limited Warranty.  
5. Special order items are not returnable for  
credit.  
6. Credit on returned parts and units will be  
issued at actual dealer net price at time of  
purchase less 15% restocking charge.  
Parts: FOB Carson, California or Boise,  
Idaho. See Freight Policy for details and  
additional discounts.  
7. All returned shipments are to be made to  
the STOW designated receiving point,  
freight prepaid at the sender’s expense.  
STOW CONSTRUCTION EQUIPMENT  
POST OFFICE BOX 6254  
CARSON, CALIFORNIA 90749  
310-661-4242 • 877-BUY-STOW  
FAX:310-604-9237  
E-MAIL: stow@stowmfg.com  
Atlanta • Boise • Newark • Quebec, Canada  
Manchester, UK • Rio de Janeiro, BR • Puebla, MX  
PAGE 74 — STOW SDP-2 / SDP-3 DIAPHRAGM PUMP — PARTS MANUAL — REV. #2 (12/16/03)  
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NOTE PAGE  
STOW SDP-2 / SDP-3 DIAPHRAGM PUMP — PARTS MANUAL— REV. #2 (12/16/03) — PAGE 75  
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OPERATION AND PARTS MANUAL  
HERE'S HOW TO GET HELP  
PLEASE HAVE THE MODEL AND SERIAL  
NUMBER ON-HAND WHEN CALLING  
PARTSDEPARTMENT  
800-427-1244  
310-537-3700  
FAX: 800-672-7877  
FAX: 310-637-3284  
SERVICEDEPARTMENT  
800-478-1244  
310-537-3700  
FAX: 310-537-4259  
TECHNICALASSISTANCE  
800-478-1244  
FAX: 310-631-5032  
WARRANTYDEPARTMENT  
800-421-1244, EXT. 279 FAX: 310-537-1173  
310-537-3700, EXT. 279  
SALESDEPARTMENT  
310-661-4242  
FAX: 310-604-9237  
877-289-7869 (877-BUY-STOW)  
STOWCONSTRUCTIONEQUIPMENT  
A DIVISION OF MULTIQUIP INC.  
POST OFFICE BOX 6254  
PARTS DEPARTMENT:  
800-427-1244  
FAX: 800-672-7877  
SERVICE DEPARTMENT/TECHNICAL ASSISTANCE:  
800-478-1244  
CARSON, CA 90749  
310-537-3700 • 888-252-STOW [888-252-7869]  
FAX:310-537-1986 • FAX:800-556-1986  
E-MAIL: stow@multiquip.com • WWW: stowmfg.com  
FAX:310-631-5032  
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