Owner/Operator
Manual
2-Cycle Trimmer
• Safety
• Assembly
• Operation
• Maintenance
Models
TB2000 – 22.5cc Curved Shaft
©2000 MTD SOUTHWEST INC
FORM 182821 (1/01) (10201 rev. A)
Printed in U.S.A.
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Service Information
SERVICE INFORMATION
Service on this unit both within and after the warranty period should be performed only by an authorized and
approved service dealer.
Dial:
• 1-800-345-8746 for authorized service dealers in the United States
Or
• 1-800-668-1238 in Canada to obtain the listing of the authorized service dealer nearest you.
DO NOT RETURN THE UNIT TO THE RETAILER.
NOTE: PROOF OF PURCHASE WILL BE REQUIRED FOR WARRANTY SERVICE.
Make sure this manual is carefully read and understood before starting or operating this equipment.
THIS PRODUCT IS COVERED BY ONE OR MORE US PATENTS, OTHER PATENTS PENDING.
WARNING:
Engine Exhaust, some of its constituents, and certain vehicle components contain or
emit chemicals known to State of California to cause cancer and birth defects or other reproductive harm.
SPARK ARRESTER INFORMATION
NOTE: For users on U.S. Forest Land and in the states of California, Maine, Oregon and Washington. All
U.S. Forest Land and the state of California (Public Resources Codes 4442 and 4443), Oregon and Washington
require, by law that certain internal combustion engines operated on forest brush and/or grass-covered areas be
equipped with a spark arrestor, maintained in effective working order, or the engine be constructed, equipped and
maintained for the prevention of fire. Check with your state or local authorities for regulations pertaining to these
requirements. Failure to follow these requirements could subject you to liability or a fine. This unit is factory
equipped with a spark arrestor. If it requires replacement, ask your LOCAL SERVICE dealer to install the
Accessory Part #181696 Spark Arrestor Kit.
Identification Numbers
Before you start assembling your new equipment, please locate the model plate on the unit and copy the
information from it to the space provided below. The information on the model plate is very important if you need
help from our Customer Support Department or an authorized dealer.
• You can locate the model number on the shaft housing of the unit next to the On/Off Stop Control Switch.
A sample model plate is explained below. For future reference, please copy the model number and the serial
number of the equipment in the space below.
Copy the model / parent
part number here:
Copy the serial number here:
3
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Section 1
Safety
The purpose of safety symbols is to attract your
attention to possible dangers. The safety symbols,
and their explanations, deserve your careful attention
and understanding. The safety warnings do not by
themselves eliminate any danger. The instructions or
warnings they give are not substitutes for proper
accident prevention measures.
Failure to obey a safety warning will result in
serious injury to yourself or to others. Always fol-
low the safety precautions to reduce the risk of
fire, electric shock, and personal injury.
SYMBOL
MEANING
SAFETY ALERT SYMBOL: Indicates
danger, warning, or caution. Attention is
required in order to avoid serious personal
injury. May be used in conjunction with
other symbols or pictographs.
Failure to obey a safety warning can result in
injury to yourself and others. Always follow the
safety precautions to reduce the risk of fire,
electric shock, and personal injury.
NOTE:Advises you of information or instructions
vital to the operation or maintenance of the
equipment.
Failure to obey a safety warning may result in
property damage or personal injury to yourself
or to others. Always follow the safety precau-
tions to reduce the risk of fire, electric shock,
and personal injury.
• IMPORTANT SAFETY INFORMATION •
• Clear the area to be cut before each use. Remove all
READ ALL INSTRUCTIONS
objects such as rocks, broken glass, nails, wire, or
string which can be thrown or become entangled in
the cutting attachment. Clear the area of children,
bystanders, and pets. At a minimum, keep all chil-
dren, bystanders and pets outside a 50 feet (15 m)
radius; there still may be a risk to bystanders from
thrown objects. Bystanders should wear eye protec-
tion. If you are approached, stop the engine and
cutting attachment immediately.
BEFORE OPERATING
• Read the instructions carefully. Be familiar with the
controls and proper use of the unit.
• Do not operate this unit when tired, ill, or under the
influence of alcohol, drugs, or medication.
• Children and teens under the age of 15 must not use
the unit, except for teens guided by an adult.
• Squeeze the throttle control and check that it returns
automatically to the idle position. Make all adjust-
ments or repairs before using unit.
• Inspect the unit before use. Replace damaged parts.
Check for fuel leaks. Make sure all fasteners are in
place and secure. Replace cutting attachment parts
that are cracked, chipped, or damaged in any way.
Make sure the cutting attachment is properly
installed and securely fastened. Be sure the cutting
attachment shield is properly attached, and posi-
tioned as recommended. Failure to so can result in
personal injury to the operator and bystanders, as
well as damage to the unit.
• This unit was not designed to be used as a brush
cutter. Do not attach or operate this unit with any
type of brush cutting blade or brush cutting attach-
ment.
SAFETY WARNINGS FOR GAS TRIMMERS
WARNING: Gasoline is highly flammable, and its
vapors can explode if ignited. Take the following pre-
cautions:
• Use only 0.095 inch (2.41 mm) diameter genuine
manufacturer’s replacement line. Never use metal-
reinforced line, wire, chain, or rope, etc. These can
break off and become a dangerous projectile.
• Store fuel only in containers specifically designed
and approved for the storage of such materials.
• Be aware of the risk of injury to the head, hands and
feet.
4
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Safety (continued)
• Always stop the engine and allow it to cool before
filling the fuel tank. Never remove the cap of the fuel
tank, or add fuel, when the engine is hot. Never
operate the unit without the fuel cap securely in
place. Loosen the fuel tank cap slowly to relieve any
pressure in the tank.
• Always hold the unit with both hands when operat-
ing. Keep a firm grip on both the front and rear han-
dle or grips.
• Keep hands, face, and feet at a distance from all
moving parts. Do not touch or try to stop the cutting
attachment when it is rotating.
• Add fuel in a clean, well-ventilated area outdoors
where there are no sparks or flames. Slowly remove
the fuel cap only after stopping engine. Do not
smoke while fueling or mixing fuel. Wipe up any
spilled fuel from the unit immediately.
• Do not touch the engine, gear housing or muffler.
These parts get extremely hot from operation. When
turned off they remain hot for a short time.
• Do not operate the engine faster than the speed
needed to cut, trim or edge. Do not run the engine at
high speed when not cutting.
• Avoid creating a source of ignition for spilled fuel. Do
not start the engine until fuel vapors dissipate.
• Always stop the engine when cutting is delayed or
when walking from one cutting location to another.
• Move the unit at least 30 feet (9.1 m) from the fueling
source and site before starting the engine. Do not
smoke, keep sparks and open flames from the area
while adding fuel or operating the unit.
• If you strike or become entangled with a foreign
object, stop the engine immediately and check for
damage. Do not operate before repairing damage.
Do not operate the unit with loose or damaged parts.
WHILE OPERATING
• Never start or run the unit inside a closed room or
building. Breathing exhaust fumes can kill. Operate
this unit only in a well ventilated area outdoors.
• Stop and switch the engine to off for maintenance,
repair, or for changing the cutting attachment or
other attachments.
• Wear safety glasses or goggles that are marked as
meeting ANSI Z87.1 standards, and ear/hearing pro-
tection when operating this unit. Wear a face or dust
mask if the operation is dusty.
• Use only genuine manufacturer’s replacement parts
and accessories for this unit. These are available
from your authorized service dealer. Use of any parts
or accessories not authorized by the manufacturer
could lead to serious injury to the user, or damage to
the unit, and void your warranty.
• Wear heavy, long pants, boots, gloves and a long
sleeve shirt. Do not wear loose clothing, jewelry,
short pants, sandals or go barefoot. Secure hair
above shoulder level.
• Keep unit clean of vegetation and other materials.
They may become lodged between the cutting
attachment and shield.
• The cutting attachment shield must always be in
place while operating the unit. Do not operate unit
without both trimming lines extended, and the proper
line installed. Do not extend the trimming line beyond
the length of the shield.
• To reduce fire hazard, replace faulty muffler and
spark arrestor, keep the engine and muffler free from
grass, leaves, excessive grease or carbon build up.
OTHER SAFETY WARNINGS
• Never store the unit, with fuel in the tank, inside a
building where fumes may reach an open flame or
spark.
• This unit has a clutch. The cutting attachment
remains stationary when the engine is idling. If it
does not, have the unit adjusted by an authorized
service technician.
• Allow the engine to cool before storing or transport-
ing. Be sure to secure the unit while transporting.
• Adjust the D-Handle to your size to provide the best
grip.
• Store the unit in a dry area, locked up or up high
to prevent unauthorized use or damage, out of the
reach of children.
• Be sure the cutting attachment is not in contact with
anything before starting the unit.
• Use the unit only in daylight or good artificial light.
• Never douse or squirt the unit with water or any other
liquid. Keep handles dry, clean and free from debris.
Clean after each use, see Cleaning and Storage
instructions.
• Avoid accidental starting. Be in the starting position
whenever pulling the starter rope. The operator and
unit must be in a stable position while starting. See
Section 5, Operation.
• Keep these instructions. Refer to them often and use
them to instruct other users. If you loan someone this
unit, also loan them these instructions.
• Use the right tool. Only use this tool for the purpose
intended.
• Do not overreach. Always keep proper footing and
balance.
SAVE THESE INSTRUCTIONS
5
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Safety (continued)
SAFETY AND INTERNATIONAL SYMBOLS
This operator's manual describes safety and international symbols and pictographs that may appear on this product.
Read the operator's manual for complete safety, assembly, operating and maintenance and repair information.
SYMBOL
MEANING
• SAFETY ALERT SYMBOL
Indicates danger, warning, or caution. May be used in conjunction with other
symbols or pictographs.
• WARNING - READ OPERATOR'S MANUAL
Read the Operator’s Manual(s) and follow all warnings and safety instructions.
Failure to do so can result in serious injury to the operator and/or bystanders.
• FOR SERVICE INFORMATION, CALL:
USA: 1-800-345-8746
CANADA: 1-800-668-1238
• WEAR EYE AND HEARING PROTECTION
WARNING: Thrown objects and loud noise can cause severe eye injury and hearing
loss. Wear eye protection meeting ANSI Z87.1 standards and ear protection when
operating this unit.
• KEEP BYSTANDERS AWAY
WARNING: Keep all bystanders, especially children and pets, at least 50 feet (15 m)
from the operating area.
• PRIMER BULB
Push primer bulb, fully and slowly, 5 to 7 times.
• UNLEADED FUEL
Always use clean, fresh unleaded fuel.
• OIL
Refer to operator's manual for the proper type of oil.
• THROWN OBJECTS AND ROTATING CUTTER CAN CAUSE SEVERE INJURY
WARNING: Do not operate without the cutting attachment shield in place.
Keep away from the rotating cutting attachment.
6
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Safety (continued)
SYMBOL
MEANING
• ON/OFF STOP CONTROL
ON / START / RUN
• ON/OFF STOP CONTROL
OFF OR STOP
• HOT SURFACE WARNING
Do not touch a hot muffler, gear housing or cylinder. You may get burned. These parts
get extremely hot from operation. When turned off they remain hot for a short time.
• SHARP BLADE
WARNING: Sharp blade on cutting attachment shield. To prevent serious injury, do not
touch line cutting blade.
• CHOKE CONTROL
A • START position.
B • RUN position.
• DO NOT USE BLADES
WARNING: To prevent serious personal injury, do not attach or operate the
unit with any type of blade.
WARNING: The operation of any power tool can cause foreign objects to be thrown
into your eyes. This can lead to severe eye damage. Before commencing power tool
operation, always wear safety glasses or goggles that are marked as meeting ANSI
Z87.1 standards, and a full face shield when needed.
7
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Section 2
Know Your Unit
APPLICATIONS
As a trimmer;
•
•
•
Cutting grass and light weeds.
Edging
Decorative trimming around trees, fences, etc.
Spark Plug
Starter Rope Grip
Gas Cap
Shaft Grip
Air Filter Cover
Throttle Control
On/Off Stop Control
D-Handle
Shaft Housing
Choke Lever
Primer Bulb
Cutting Attachment
Line Cutting Blade
Cutting Attachment Shield
8
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Section 3
Assembly
(4) Screws
(4) Screws
Shaft Grip
Shaft
Housing
Fig. 3-4
Minimum 6 inches
(15.24 cm)
On some units, the D-handle may be preinstalled and
only require loosening the screws and adjusting the
D-handle to the operator. Go to step 4 for adjusting the
D-handle if preinstalled.
D-Handle
Bottom Clamp
INSTALLING AND ADJUSTING THE D-HANDLE
1. Remove the screws, nuts and bottom clamp piece
that were installed on the D-handle for shipping.
(4) Nuts
Fig. 3-1
2. Place D-handle the over the shaft housing and onto
the bottom clamp (Fig. 3-1). Place it a minimum of
6 inches (15.24 cm) from the end of the shaft grip.
3. Hold each hex nut in the bottom clamp recess with
a finger. Start screws with a large Phillips screw-
driver. Do not tighten until you make the handle
adjustment.
4. If it was preinstalled, loosen the screws on the
D-handle just enough to move the D-handle.
5. While holding the unit in the operating position
(Fig. 3-2), position the D-handle to the location
that provides you the best grip.
6. Tighten the clamp screws evenly, until the D-handle
is secure.
INSTALLING THE CUTTING ATTACHMENT
SHIELD
Fig. 3-2
Use the following instructions if the cutting attachment
shield on your unit is not installed.
Shaft Housing
Never operate the trimmer without the cutting
attachment shield in place to prevent serious
personal injury.
1. Place the cutting attachment shield onto the shaft
housing above the clamp assembly (Fig. 3-3).
Clamp
2. Push the cutting attachment shield down to the top
of the cutting attachment assembly and then rotate
the cutting attachment shield until the screw holes
align and the guard fits into the recessed pocket
(Fig. 3-3).
Cutting Attachment
Shield
Cutting Attachment
Fig. 3-3
3. Install the four (4) screws with a Phillips screwdriver
(Fig. 3-4).
9
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Section 4
Oil and Fuel
If unavailable, use a good 2-cycle oil designed for
air-cooled engines along with a fuel additive, such as
STA-BIL® Gas Stabilizer or an equivalent. Add 0.8 oz.
(23 ml) of fuel additive per gallon of fuel according to
the instructions on the container. NEVER add fuel addi-
tives directly to the unit's fuel tank.
+
For proper engine operation and maximum relia-
bility, pay strict attention to the oil and fuel mix-
ing instructions on the 2-cycle oil container.
Using improperly mixed fuel can severely dam-
age the engine.
UNLEADED GAS
TROY-BILT 2 CYCLE OIL
1 US. GALLON
(3.8 LITERS)
+
4.0 FL. OZ.
(118 ml)
Thoroughly mix the proper ratio of 2-cycle engine oil
with unleaded gasoline in a separate fuel can. Use a
32:1 fuel/oil ratio. Do not mix them directly in the
engine fuel tank. See Figure 4-1 for specific gas and oil
mixing ratios.
MIXING RATIO - 32:1
Fig. 4-1
Oil and Gas Mixing Instructions
NOTE: One gallon (3.8 liters) of unleaded gasoline
mixed with one 4 oz. (118 ml) bottle of TROY-BILT
2-CYCLE OIL makes a 32:1 fuel/oil ratio.
Old and/or improperly mixed fuel are the main
reasons for the unit not running properly. Be sure to
use fresh, clean unleaded fuel. Follow the instructions
carefully for the proper fuel/oil mixture.
Definition of Blended Fuels
Gasoline is extremely flammable. Ignited Vapors
may explode. Always stop the engine and allow it
to cool before filling the fuel tank. Do not smoke
while filling the tank. Keep sparks and open
flames at a distance from the area.
Today's fuels are often a blend of gasoline and
oxygenates such as ethanol, methanol or MTBE (ether).
Alcohol-blended fuel absorbs water. As little as 1%
water in the fuel can make fuel and oil separate. It
forms acids when stored. When using alcohol-blended
fuel, use fresh fuel (less than 60 days old).
Remove fuel cap slowly to avoid injury from fuel
spray. Never operate the unit without the fuel cap
securely in place.
Using Blended Fuels
If you choose to use a blended fuel, or its use is
unavoidable, follow recommended precautions.
• Always use fresh fuel mix per your operator's manu-
al.
• Always agitate the fuel mix before fueling the unit.
Add fuel in a clean, well ventilated area outdoors.
Wipe up any spilled fuel immediately. Avoid creat-
ing a source of ignition for spilt fuel. Do not start
the engine until fuel vapors dissipate.
• Drain the tank and run the engine dry before storing
the unit.
Using Fuel Additives
The bottle of TROY-BILT 2-Cycle oil that came with
your unit contains a fuel additive which will help inhibit
corrosion and minimize the formation of gum
deposits.It is recommended that you use only
TROY-BILT 2-Cycle oil with this unit.
NOTE: Dispose of the old fuel/oil mix in accordance to
Federal, State, and Local regulations.
10
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Section 5
Operation
Avoid accidental starting. Be in the starting
position whenever pulling the starting rope. To
avoid serious personal injury, the operator and
unit must be in a stable position while starting.
Start/
On (I)
STARTING INSTRUCTIONS
1. Mix gas with oil. Fill fuel tank with fuel/oil mixture.
See Section 4, Oil and Fuel.
Stop/
Off (O)
On/Off Stop Control
2. Put the On/Off Stop Control in the START (I)
Fig. 5-1
position (Fig. 5-1).
3. Fully press and release primer bulb slowly 5 to 7
times. Fuel should be felt and visible in the bulb
(Fig. 5-2). If fuel hasn’t entered the bulb, press
three more times, or until it does.
4. Place the choke lever in the START (A) position
(Fig. 5-2).
Choke Lever
5. With the unit on the ground, squeeze the throttle
control and hold. Pull starter rope briskly (Fig. 5-3).
Continue pulling until the engine sounds as though
it wants to run (normally 2 to 5 pulls).
Run (B)
Start (A)
NOTE: Squeeze the throttle control until the engine
has started and warmed up.
Primer Bulb
Fig. 5-2
6. Place the choke lever in the RUN (B) position
(Fig. 5-2).
7. Pull starter rope briskly 1 to 3 times to start the
engine (Fig. 5-3).
8. If the engine does not start, repeat steps
4 through 7.
NOTE: If the engine floods while trying to start,
place the choke lever in the RUN (B) position.
Squeeze the throttle control. Pull the starter rope
briskly. The engine should start within three (3) to
eight (8) pulls.
Starter Rope
9. Squeeze the throttle control to warm up engine for
5 to 10 seconds. Place the choke lever in the RUN
(B) position (Fig. 5-2).
NOTE: Choking is unnecessary when starting a
warm engine. Put the On/Off Stop Control in the
START (I) position (Fig. 5-1), and the choke lever in
the RUN (B) position (Fig. 5-2).
Throttle Control
Fig. 5-3
STOPPING INSTRUCTIONS
STARTING INSTRUCTIONS
1. Release your hand from the throttle control
(Fig. 5-3). Allow the engine to idle.
2. To stop the engine, put the On/Off Stop Control in
the STOP [ ] position (Fig. 5-1).
O
Operate this unit only in a well ventilated area
outdoors. Carbon monoxide exhaust fumes can
be lethal in a confined area.
11
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Operation (continued)
Do not remove or alter the line cutting blade
assembly. Excessive line length will make the
clutch overheat. This may lead to serious person-
al injury or damage to the unit.
Some line breakage will occur from:
•
•
•
•
Entanglement with foreign matter
Normal line fatigue
Attempting to cut thick, stalky weeds
Forcing the line into objects such as walls or fence
posts
TIPS FOR BEST TRIMMING RESULTS
•
Keep the cutting attachment parallel to the ground.
Fig. 5-4
•
Do not force the cutting attachment. Allow the tip
of the line to do the cutting, especially along walls.
Cutting with more than the tip will reduce cutting
efficiency and may overload the engine.
HOLDING THE TRIMMER
•
•
•
Cut grass over 8 inches (200 mm) by working from
top to bottom in small increments to avoid prema-
ture line wear or engine drag.
Always wear eye, hearing, foot and body protec-
tion to reduce the risk of injury when operating
this unit.
Cut from left to right whenever possible. Cutting to
the right improves the unit's cutting efficiency.
Clippings are thrown away from the operator.
Slowly move the trimmer into and out of the cutting
area at the desired height. Move either in a for-
ward-backward or side-to-side motion. Cutting
shorter lengths produces the best results.
Before operating the unit, stand in the operating posi-
tion (Fig. 5-4). Check for the following:
•
•
•
The operator is wearing eye protection and proper
clothing.
•
•
Trim only when grass and weeds are dry.
The right arm is slightly bent, and the hand is hold-
ing the shaft grip.
The life of your cutting line is dependent upon;
•
•
•
Following the previous trimming techniques
What vegetation is being cut
Where it’s being cut
The left arm is straight, and the hand is holding the
D-handle.
•
•
The unit is at waist level.
For example, the line will wear faster when trimming
against a foundation wall as opposed to trimming
around a tree.
The cutting attachment is parallel to the ground and
easily contacts the vegetation to be cut without the
operator having to bend over.
ADJUSTING TRIMMING LINE LENGTH
The AFS™ cutting attachment (Automatic Feed
System) automatically feeds out cutting line as needed.
A blade on the cutting attachment shield will cut the
line to the proper length if excess line is released.
NOTE: If the lines stops feeding, this is usually a
sign that the cutting attachment requires new line.
See Section 6, Maintenace, Line Installation.
NOTE: Do not rest the AFS cutting attachment on
the ground while the unit is running .
12
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Operation (continued)
DECORATIVE TRIMMING
Decorative trimming is accomplished by removing all
vegetation around trees, posts, fences, etc.
Rotate the whole unit so that the cutting attachment is
at a 30° angle to the ground (Fig. 5-5).
Fig. 5-5
Section 6
MAINTENANCE
NOTE: Some maintenance procedures may require
special tools or skills. If you are unsure about these
procedures take your unit to an authorized service
dealer.
To prevent serious injury, never do maintenance
or repairs with unit running. Always do mainte-
nance and repairs on a cool unit. Disconnect
spark plug wire to ensure the unit will not start.
MAINTENANCE SCHEDULE
These required maintenance procedures should be
performed at the frequency stated in the table. They
should also be included as part of any seasonal tune-
up.
WHEN
MAINTENANCE NEEDED
GO TO:
Page 10
Page 16
Page 17
Before Starting Engine
Every 10 Hours
Fill fuel tank with correct oil and fuel mixture.
Clean and re-oil air filter.
Every 50 Hours
Check spark plug condition and gap
13
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Maintenance (continued)
LINE INSTALLATION
This section covers both Membrane line and standard
single line installation.
Always use manufacturer’s 0.080 inch (2.03 mm)
replacement line. Line other than specified may make
the engine overheat or fail.
Tab
Never use metal-reinforced line, wire, chain, or
rope, etc. These can break off and become a
dangerous projectile.
PRESS TABS
TO REMOVE
There are two methods to replace the trimming line.
• Wind the inner reel with new line
• Install a prewound inner reel
Fig. 6-1
Outer Spool
Inner Reel
Winding the Existing Inner Reel
1. Press the tabs in and remove the bottom cover
(Fig. 6-1).
Bottom Cover
2. Remove the inner reel from the outer spool
(Fig. 6-2).
3. Use a clean cloth to clean the inner reel.
4. Check the pawl for cracking or pin wear (Fig. 6-3).
5. If the pawl shows any sign of cracking or has
excessive pin wear, then replace the pawl. See
Section 6, Maintenace, Pawl Replacement.
Pawl
Single Line Installation
Go To Step 9 for Membrane Line Installation
6. Take two equal lengths of approximately 10 feet
Fig. 6-2
(3 m) of new trimming line.
7. Holding the two pieces together with the ends
even,insert the lines into the slotted hole in the
inner reel (Fig. 6-4). Only about 1/2 inch of line will
fit in hole. Do not force line in hole.
NOTE: Take care when starting to wind the line as
not to pull either piece out of the slotted hole.
Pin
Pawl
8. Wind the lines in tight even layers, onto the inner
reel (Fig. 6-5). Wind the line in the direction indicat-
ed on the inner reel. Place your index finger
between the two lines to stop the lines from over-
lapping. Do not overlap the ends of the line.
Proceed to step 11.
Cracking
Pin Wear
Membrane Line Installation
9. Take approximately 10 feet (3 m) of new trimming
line. Insert one end of the line into the slotted hole
in the inner reel (Fig. 6-4). Only about 1/2 inch of
line will fit in hole. Do not force line in hole.
Fig. 6-3
10. Before winding, split the other end of the line back
about 6 inches.
11. Wind the line in tight even layers in the direction
indicated on the inner reel. Do not twist the line
while winding.
NOTE: Failure to wind the line in the direction indi-
cated will cause the cutting line not to advance.
14
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Maintenance (continued)
12. Insert the ends of the line into the two holding slots
(Fig. 6-6). Leave about 4 inches (102 mm) of line
beyond the holding slots.
Slotted
Hole
13. Insert the ends of the line through the eyelets in the
outer spool and place inner reel inside the outer
spool (Fig. 6-7).
14. While holding the inner reel and outer spool, grasp
the ends and pull firmly to release the line from the
holding slots in the inner reel.
15. Push the bottom cover into the outer spool until it
snaps into place
Fig. 6-4
INSTALLING A PREWOUND REEL
1. Press the tabs in and remove the bottom cover
(Fig. 6-1).
2. Remove the old inner reel from the outer spool
(Fig. 6-1).
3. Take the prewound inner reel and Insert the ends of
the line through the eyelets in the outer spool
(Fig. 6-7).
4. While holding the inner reel and outer spool, grasp
the ends and pull firmly to release the line from the
holding slots in the inner reel.
Fig. 6-5
5. Push the bottom cover into the outer spool until it
snaps into place
Replacement Parts:
See Accessories / Replacement Parts on page 18.
Holding
Slot
PAWL REPLACEMENT
If the pawl in the cutting attachment requires replace-
ment due to cracking or wear, use the following
instructions.
Holding
Slot
1. Position the pawl so that it is hooked by the spring
(Fig. 6-8).
2. Position a medium sized flat bladed screwdriver
through the tab hole in the outer spool and under the
pawl as shown in figure 6-8. The end of the screw-
driver needs to be right next to the pawl shaft.
Fig. 6-6
3. Turn the screwdriver to remove the pawl from it’s
retaining hole in the outer spool.
4. Replace with a new pawl. Press the pawl in firmly
until it snaps into place.
Pawl Shaft
Eyelet
Position Pawl
Tab Hole
Eyelet
Fig. 6-7
Screwdriver
Fig. 6-8
15
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Maintenance (continued)
AIR FILTER MAINTENANCE
Cleaning the Air Filter
Carburetor/ Air
Filter Cover
To avoid serious personal injury, always turn your
trimmer off and allow it to cool before you clean
or do any maintenance on it.
Tab
Clean and re-oil the air filter every 10 hours of opera-
tion. It is an important item to maintain. Not maintain-
ing the air filter will VOID the warranty.
1. Remove the carburetor/air filter cover by pushing
on the tab on top of the cover (Fig. 6-9).
Fig. 6-9
2. Remove the air filter (Fig. 6-10).
3. Wash the filter in detergent and water. Rinse the
filter thoroughly and allow it to dry.
4. Apply enough clean SAE 30 motor oil to lightly coat
the filter (Fig. 6-11).
5. Squeeze the filter to spread and remove excess oil
(Fig. 6-11).
6. Reinstall the filter (Fig. 6-10) and air filter cover
(Fig. 6-9).
Air Filter
NOTE: If the unit is operated without the air filter,
you will VOID the warranty.
Fig. 6-10
CARBURETOR ADJUSTMENT
The idle speed of the engine is adjustable by the screw
next to the air filter cover (Fig 6-12).
NOTE: Careless adjustments can seriously damage
your unit. An authorized service dealer should make
carburetor adjustments.
Check Fuel Mixture
Old and/or improperly mixed fuel is usually the reason
for the unit not running properly. Drain and refill the
tank with fresh, properly mixed fuel prior to making any
adjustments. See Section 5, Oil and Fuel.
Clean Air Filter
The condition of the air filter is important to the opera-
tion of the unit. A dirty air filter will restrict air flow and
change the air/fuel mixture. This is often mistaken for
an out of adjustment carburetor. Check the condition of
the air filter before adjusting the idle speed screw. See
Section 6, Maintenance.
Fig. 6-11
Idle Speed Screw
Adjust Idle Speed Screw
The cutting attachment may be spinning during
idle speed adjustment. Wear protective clothing
and observe all safety instructions to prevent
serious personal injury.
Fig. 6-12
16
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Maintenance (continued)
If after checking the fuel mixture and cleaning the air
filter the engine still will not idle, adjust the idle speed
screw as follows.
1. Start the engine and let it run at a high idle for a
minute to warm up.
REPLACING THE SPARK PLUG
Use a Champion RCJ6Y spark plug (or equivalent). The
correct air gap is 0.025 inch (0.655 mm). Remove the
plug after every 50 hours of operation and check its
condition.
2. Release the throttle trigger and let the engine idle. If
the engine stops, insert a small phillips or flat blade
screwdriver into the screw next to the air filter
cover (Fig. 6-12). Turn the idle speed screw in,
clockwise, 1/8 of a turn at a time (as needed) until
the engine idles smoothly.
1. Stop the engine and allow it to cool. Grasp the plug
wire firmly and pull the cap from the spark plug.
2. Clean dirt from around the spark plug. Remove the
spark plug from the cylinder head by turning a 5/8
inch socket counterclockwise.
3. Replace cracked, fouled or dirty spark plug. Set the
air gap at 0.025 inch (0.655 mm) using a feeler
gauge (Fig. 6-13).
NOTE: The cutting attachment should not rotate
when the engine idles.
3. If the cutting attachment rotates when the engine
idles, turn the idle speed screw counterclockwise
1/8 of a turn at a time (as needed), to reduce idle
speed.
Do not sand blast, scrape, or clean electrodes.
Grit in the engine could damage the cylinder.
Checking the fuel mixture, cleaning the air filter, and
adjusting the idle speed screw should solve most
engine problems.
4. Install a correctly gaped spark plug in the cylinder
head. Tighten by turning the 5/8 inch socket clock-
wise until snug.
If not and:
•
•
•
The engine will not idle,
If using a torque wrench torque to;
110-120 in.•lb. (12.3-13.5 N•m).
Do not over tighten.
The engine hesitates or stalls on acceleration,
There is a loss of engine power,
have the carburetor adjusted by an
authorized service dealer.
0.025 inch
(0.655 mm)
Fig. 6-13
17
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Maintenance (continued)
ACCESSORIES/REPLACEMENT PARTS
LONG TERM STORAGE
If the unit will be stored for an extended time,
Spark Plug . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 181765
Spark Arrestor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 182153
Replacement Line Cartridge . . . . . . . . . . . . . . . . 49U0333L063
Fuel Cap . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 180000
Shoulder Harness . . . . . . . . . . . . . . . . . . . . . . . . . . . . 682075
1. Drain all fuel from the gas tank into a container. Do
not use fuel that has been stored for more than 60
days. Dispose of the old fuel in accordance to
Federal, State, and Local regulations.
2. Start the engine and allow it to run until it stalls.
This ensures that all gasoline has been drained
from the carburetor.
These replacement parts can be purchased from your
local authorized dealer.
3. Allow the engine to cool. Remove the spark plug
and put 1 oz. (30 ml) of high quality motor oil into
the cylinder. Pull the starter rope slowly to distrib-
ute the oil. Reinstall the spark plug.
CLEANING
NOTE: Remove the spark plug and drain all of the
oil from the cylinder before attempting to start the
trimmer after storage.
To avoid serious personal injury, always turn your
trimmer off and allow it to cool before you clean
or do any maintenance on it.
4. Thoroughly clean the unit and inspect for any loose
or damaged parts. Repair or replace damaged
parts and tighten loose screws, nuts or bolts. The
unit is ready for storage.
Use a small brush to clean off the outside of the unit.
Do not use strong detergents. Household cleaners that
contain aromatic oils such as pine and lemon, and
such as kerosene, can damage plastic housing or han-
dle. Wipe off any moisture with a soft cloth.
TRANSPORTING
• Allow the engine to cool before transporting.
• Secure the unit while transporting.
• Drain the gas tank before transporting.
• Tighten gas cap before transporting.
STORAGE
• Never store the unit with gasoline in the tank where
fumes may reach an open flame or spark.
• Allow the engine to cool before storing.
• Store the unit locked up to prevent unauthorized use
or damage.
• Store the unit in a dry, well ventilated area.
• Store the unit out of the reach of children.
18
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Section 7
Troubleshooting
ENGINE WILL NOT START
C A U S E
A C T I O N
On/Off Stop Control is in STOP position
Turn On/Off Stop Control to START
Fill fuel tank with properly mixed fuel
Press primer bulb fully and slowly 5-7 times
Empty fuel tank
Primer bulb wasn't pressed enough
Engine flooded
Use starting procedure with choke lever in the
RUN position, Pg. 11
Old or improperly mixed fuel
Fouled spark plug
Drain gas tank / Add fresh fuel mixture
Replace or clean the spark plug
ENGINE WILL NOT IDLE
C A U S E
A C T I O N
Air Filter is Plugged
Replace or clean the air filter
Drain gas tank / Add fresh fuel mixture
Adjust per instruction Pg. 16
Old or improperly mixed fuel
Improper carburetor adjustment
ENGINE WILL NOT ACCELERATE
C A U S E
A C T I O N
Old or improperly mixed fuel
Drain gas tank / Add fresh fuel mixture
Improper carburetor adjustment
Take to an authorized service dealer for
carburetor adjustment
Cutting attachment bound with grass
Dirty air filter
Stop the engine and clean the cutting attachment
Clean or replace the air filter
ENGINE LACKS POWER OR STALLS WHEN CUTTING
C A U S E
A C T I O N
Old or improperly mixed fuel
Drain gas tank / Add fresh fuel mixture
Improper carburetor adjustment
Take to an authorized service dealer for
carburetor adjustment
CUTTING ATTACHMENT WILL NOT ADVANCE LINE
C A U S E
A C T I O N
Cutting attachment bound with grass
Cutting attachment out of line
Inner reel bound up
Stop the engine and clean cutting attachment
Refill with new line
Replace the inner reel
Cutting head dirty
Clean inner reel and outer spool
Line welded
Disassemble, remove the welded section
and rewind the line
Line twisted when refilled
Disassemble and rewind the line
CUTTING LINE ADVANCES UNCONTROLLABLY
C A U S E
A C T I O N
Pawl in cutting attachment is worn or broken
Disassemble and check pawl, replace if needed
19
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Section 8
Specifications
ENGINE
Engine Type . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Air-Cooled, 2-Cycle
Displacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.37 cu. in. (22.5 cc)
Clutch Type . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Centrifugal
Idle Speed RPM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2,600-3,600 rpm
Operating RPM (Trimmer( . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7,700-8,600 rpm
Ignition Type . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Electronic
On/Off Stop Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Toggle Switch
Lubrication . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Fuel/Oil Mixture
Fuel/Oil Ratio . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32:1
Fuel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Unleaded
Carburetor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Diaphragm, All-Position
Starter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Auto Rewind
Muffler . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Baffled with Guard
Throttle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Manual Spring Return
Fuel Tank Capacity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 oz (591 ml)
DRIVE SHAFT & CUTTING ATTACHMENT
Drive Shaft Housing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Aluminum Tube
Throttle Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Finger-Tip Trigger
Unit Weight (No Fuel, with D-handle, Cutting attachment shield and Cutting attachment) . . . . . . . . . . . 9.3 lbs (4.22 kg)
Cutting Mechanism . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . AFS™ Dual String Cutting Head
Line Spool . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Automatic Line Feed Releaser
Line Spool Diameter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 inches (76.2 mm)
Trimming Line Diameter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.080 inches (2.03 mm)
Cutting Path Diameter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 inches (38.1 cm)
20
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Notes
21
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MANUFACTURER’S LIMITED WARRANTY FOR:
The limited warranty set forth below is given by MTD
No implied warranty, including any implied warranty of
merchantability or fitness for a particular purpose,
applies after the applicable period of express written
warranty above as to the parts as identified. No other
express warranty or guaranty, whether written or oral,
except as mentioned above, given by any person or
entity, including a dealer or retailer, with respect to any
product shall bind MTD. During the period of the
Warranty, the exclusive remedy is repair or replacement
of the product as set forth above. (Some states do not
allow limitations on how long an implied warranty lasts, so
the above limitation may not apply to you.)
SOUTHWEST INC (“MTD”) with respect with new
merchandise purchased and used in the United States, its
possessions and territories.
MTD warrants this product against defects in material and
workmanship for a period of two (2) years commencing on
the date of original purchase and will, at its option, repair or
replace, free of charge, any part found to be defective in
material or workmanship. This limited warranty shall only
apply if this product has been operated and maintained in
accordance with the Operator’s Manual furnished with the
product, and has not been subject to misuse, abuse,
commercial use, neglect, accident, improper maintenance,
alteration, vandalism, theft, fire, water or damage because
of other peril or natural disaster. Damage resulting from the
installation or use of any accessory or attachment not
approved by MTD for use with the product(s) covered by
this manual will void your warranty as to any resulting dam-
age. This warranty is limited to ninety (90) days from the
date of original retail purchase for any MTD product that is
used for rental or commercial purposes, or any other
income-producing purpose.
The provisions as set forth in this Warranty provide the
sole and exclusive remedy arising from the sales. MTD
shall not be liable for incidental or consequential loss or
damages including, without limitation, expenses
incurred for substitute or replacement lawn care servic-
es, for transportation or for related expenses, or for
rental expenses to temporarily replace a warranted
product. (Some states do not allow limitations on how long
an implied warranty lasts, so the above limitation may not
apply to you.)
HOW TO OBTAIN SERVICE: Warranty service is available,
WITH PROOF OF PURCHASE THROUGH YOUR LOCAL
AUTHORIZED SERVICE DEALER. To locate the dealer in
your area, please check for a listing in the Yellow Pages or
contact the Customer Service Department of MTD SOUTH-
WEST INC by calling 1-800-345-8746 or writing to 550 N.
54th Street, Chandler, Arizona 85226 or if in Canada call
1-800-668-1238. No product returned directly to the facto-
ry will be accepted unless prior written permission has been
extended by the Customer Service Department of MTD
SOUTHWEST INC.
In no event shall recovery of any kind be greater than the
amount of the purchase price of the product sold. Alteration
of the safety features of the product shall void this Warranty.
You assume the risk and liability for loss, damage, or injury
to you and your property and/or to others and their
property arising out of the use or misuse or inability to use
the product.
This limited warranty shall not extend to anyone other than
the original purchaser, original lessee or the person for
whom it was purchased as a gift.
How State Law Relates to this Warranty: This warranty
gives you specific legal rights, and you may also have other
rights which vary from state to state.
This limited warranty does not provide coverage in the
following cases:
A. Tune-ups - Spark Plugs, Carburetor Adjustments,
Filters
To locate your nearest service dealer dial
1-800-345-8746 in the United States or
1-800-668-1238 in Canada.
B. Wear items - Bump Knobs, Outer Spools, Cutting
Line, Inner Reels, Starter Pulley,Starter Ropes, Drive
Belts
C. MTD does not extend any warranty for products sold
or exported outside of the United States of America,
its possessions and territories, except those sold
through MTD’s authorized channels of export distri-
bution.
MTD Southwest Inc
550 N. 54th Street
Chandler, AZ 85226 U.S.A.
MTD reserves the right to change or improve the design of
any TROY-BILT Product without assuming any obligation to
modify any product previously manufactured.
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