Engine Parts Manual
389cc (G19)
NOTICE!
The information in this manual is known to be accurate as of the date of release shown on the cover. However,
engineering changes can occur without notice. To obtain the proper parts, please be sure to use the serial
number of the unit being serviced when ordering from this manual. Always to refer to any parts notes and
changes before ordering. All other parts not shown in this manual can be found on Generac’s exploded view
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389cc ENGINE
Cylinder Head
ITEM PART NO.
QTY. DESCRIPTION
1
0J39340111
0J39340112
0J39340113
0J39340114
0G84420211
0G84420210
0J00620106
0J39340115
0J39340116
0G84420212
0K0090
6
1
1
1
4
2
1
1
1
2
2
1
1
BOLT, FLANGE
2
COVER, HEAD
3
GASKET, HEAD COVER
TUBE, BREATHER
BOLT, FLANGE, 10×80
BOLT, STUD, EXHAUST
SPARK PLUG
4
5
6
7
8
CYLINDER HEAD
GASKET, CYLINDER
DOWEL, PIN
9
10
11
12
13
BOLT, STUD, INTAKE
BOLT, FLANGE M6×12
SHROUD
0G84420194
0J39340117
3
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389cc ENGINE
Crankcase
ITEM PART NO.
QTY. DESCRIPTION
1
0G84420217
0G84420105
0G84420118
0G84420218
0G84420219
0G84420220
0G84420108
0G84420110
0G84420109
0G8442C110
0G84420267
0G84420194
0G84420112
0G84420194
2
1
1
1
1
1
1
2
2
1
1
1
1
1
BOLT, FLANGE, 6×14
SWITCH ASSY., OIL LEVEL
2
3
BEARING, RADIAL BALL, 6202
WASHER,8*16*1.2
PIN, LOCK, 10MM
SHAFT, GOVERNOR ARM
OIL SEAL, 8×14×4
BOLT, DRAIN PLUG
WASHER
4
5
6
7
8
9
10
11
12
13
14
CRANKCASE
CLIP
BOLT, FLANGE, 6×12
ALERT UNIT, OIL
BOLT, FLANGE, 6×12
4
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389cc ENGINE
Crankcase Cover
ITEM PART NO.
QTY. DESCRIPTION
1
2
3
4
5
6
7
8
9
0G9799
1
1
1
1
2
1
1
1
7
CAP COMP., OIL FILLER
GOVERNOR ASSY.
0G84420221
0G84420118
0G84420117
0G84420228
0G84420115
0G84420111
0G84420227
0G84420229
BEARING, RADIAL BALL 6202
BEARING, RADIAL BALL 6207
PIN, DOWEL 8×12
GASKET, CASE COVER
OIL SEAL 35×52×7
CRANKCASE COVER
BOLT, FLANGE M8×40
5
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389cc ENGINE
Crankshaft and Piston
ITEM PART NO.
QTY. DESCRIPTION
1
2
3
4
5
6
7
8
9
0J39430121
0G84420237
0J39430122
0G84420238
0G84420235
0G84420236
0G84420230
0J39430123
0G84420232
1
2
1
1
1
2
1
1
1
RING SET, PISTON
CLIP, PISTON PIN
PISTON
PIN, PISTON
CONNECTING ROD ASSY
BOLT, CONNECTING ROD
CRANKSHAFT ASSY
KEY, SPECIAL WOODRUFF
WEIGHT, BALANCER
6
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389cc ENGINE
Rocker and Camshaft
ITEM PART NO.
QTY. DESCRIPTION
1
0J39430124
0J39430125
0G84420122
0J35240114
0G84420123
0G84420124
0G84420125
0J39430126
0G84420128
0J39430127
0G84420174
0G84420175
1
1
2
4
2
2
1
1
1
2
2
1
ROCKER ARM ASSY.
ROCKER ARM ASSY.
ROTATOR, VALVE
VALVE LOCKER
2
3
4
5
RETAINER, VALVE SPRING
SPRING, VALVE
6
7
SEAT, VALVE SPRING
VALVE ASSY.
8
9
SEAL, VALVE STEM
PUSH ROD
10
11
12
LIFTER, VALVE
CAMSHAFT ASSY
7
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389cc ENGINE
Starter
ITEM PART NO.
QTY. DESCRIPTION
1
0G8442A114
1
5
1
1
1
STARTER ASSY.
BOLT, FLANGE
ENGINE SWITCH
2
0G84420194
7
0G9911
8
0G8442A115
BLOWER HOUSING, RECOIL STARTER
ASSY, RECOIL STARTER
9
0G9798
8
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389cc ENGINE
Flywheel
ITEM PART NO.
QTY. DESCRIPTION
1
0J25910111
1
1
1
1
1
2
FLYWHEEL
3
4
5
6
7
0G84420147
0G84420148
0G84420149
0G84420150
0G84420268
FAN COOLING
PULLEY, STARTER
NUT SPECIAL, M16
COIL ASSY., IGNITION
BOLT, FLANGE
9
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389cc ENGINE
Air Cleaner and Carburetor
ITEM PART NO.
QTY. DESCRIPTION
1
2
3
4
5
6
7
8
9
10
0G84420144
0J25910112
0G9916
1
1
1
1
1
1
1
4
1
1
1
GASKET, CARBURETOR
SPACER, CARBURETOR
GASKET, CARBURETOR
CARBURETOR ASSY.
TUBE, FUEL
0G8442A111
0G9757B
0G9757A
TUBE, FUEL
0G9914
FILTER
048031B
CLAMP
0G84420156
0G8442C111
0G84420151
GASKET, CARBURETOR
AIR CLEANER
"Not
Shown"
AIR CLEANER ELEMENT
10
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389cc ENGINE
Control System
ITEM PART NO.
QTY. DESCRIPTION
1
2
3
4
5
6
7
8
0J39430130
0G84420194
0J39430131
0J39430132
0J39430133
0G84420196
0G84420197
0G84420198
1
3
1
1
1
1
1
1
CONTORL ASSY.
BOLT, FLANGE, 6×12
SPRING, GOVERNOR A
SPRING, GOVERNOR B
ROD, GOVERNOR
NUT, FLANGE, M6
BOLT, GOVERNOR ARM
ARM, GOVERNOR
11
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©2012 Generac Power Systems, Inc. All rights reserved.
Specifications are subject to change without notice
No reproduction allowed in any form without prior written consent from Generac Power Systems, Inc.
Manual No. 0G8442CPMNL
Revision A (09/13/12)
Printed In U.S.A.
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