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
drawings online on GENservice at www.generac.com.
www.generac.com or 1-888-436-3722
Engine
389cc ENGINE
ITEM PART NO. QTY. DESCRIPTION
1 0G8442C 1 ENGINE G390FA
2
3
4
5
0J00620100
0H9761
0G84420194
0G8442C112
1
1
1
1
BOLT, FLANGE M5*10
COVER, DUST
BOLT, FLANGE M6*12
BRACKET, AIR CLEANER
2
Cylinder Head
389cc ENGINE
ITEM PART NO. QTY. DESCRIPTION
1 0J39340111 6 BOLT, FLANGE
2 0J39340112 1 COVER, HEAD
3 0J39340113 1 GASKET, HEAD COVER
4 0J39340114 1 TUBE, BREATHER
5 0G84420211 4 BOLT, FLANGE, 10×80
6 0G84420210 2 BOLT, STUD, EXHAUST
7 0J00620106 1 SPARK PLUG
8 0J39340115 1 CYLINDER HEAD
9 0J39340116 1 GASKET, CYLINDER
10 0G84420212 2 DOWEL, PIN
11 0K0090 2 BOLT, STUD, INTAKE
12 0G84420194 1 BOLT, FLANGE M6×12
13 0J39340117 1 SHROUD
3
Crankcase
389cc ENGINE
ITEM PART NO. QTY. DESCRIPTION
1 0G84420217 2 BOLT, FLANGE, 6×14
2 0G84420105 1 SWITCH ASSY., OIL LEVEL
3 0G84420118 1 BEARING, RADIAL BALL, 6202
4 0G84420218 1 WASHER,8*16*1.2
5 0G84420219 1 PIN, LOCK, 10MM
6 0G84420220 1 SHAFT, GOVERNOR ARM
7 0G84420108 1 OIL SEAL, 8×14×4
8 0G84420110 2 BOLT, DRAIN PLUG
9 0G84420109 2 WASHER
10 0G8442C110 1 CRANKCASE
11 0G84420267 1 CLIP
12 0G84420194 1 BOLT, FLANGE, 6×12
13 0G84420112 1 ALERT UNIT, OIL
14 0G84420194 1 BOLT, FLANGE, 6×12
4
Crankcase Cover
389cc ENGINE
ITEM PART NO. QTY. DESCRIPTION
1 0G9799 1 CAP COMP., OIL FILLER
2 0G84420221 1 GOVERNOR ASSY.
3 0G84420118 1 BEARING, RADIAL BALL 6202
4 0G84420117 1 BEARING, RADIAL BALL 6207
5 0G84420228 2 PIN, DOWEL 8×12
6 0G84420115 1 GASKET, CASE COVER
7 0G84420111 1 OIL SEAL 35×52×7
8 0G84420227 1 CRANKCASE COVER
9 0G84420229 7 BOLT, FLANGE M8×40
5
Crankshaft and Piston
389cc ENGINE
ITEM PART NO. QTY. DESCRIPTION
1 0J39430121 1 RING SET, PISTON
2 0G84420237 2 CLIP, PISTON PIN
3 0J39430122 1 PISTON
4 0G84420238 1 PIN, PISTON
5 0G84420235 1 CONNECTING ROD ASSY
6 0G84420236 2 BOLT, CONNECTING ROD
7 0G84420230 1 CRANKSHAFT ASSY
8 0J39430123 1 KEY, SPECIAL WOODRUFF
9 0G84420232 1 WEIGHT, BALANCER
6
Rocker and Camshaft
389cc ENGINE
ITEM PART NO. QTY. DESCRIPTION
1 0J39430124 1 ROCKER ARM ASSY.
2 0J39430125 1 ROCKER ARM ASSY.
3 0G84420122 2 ROTATOR, VALVE
4 0J35240114 4 VALVE LOCKER
5 0G84420123 2 RETAINER, VALVE SPRING
6 0G84420124 2 SPRING, VALVE
7 0G84420125 1 SEAT, VALVE SPRING
8 0J39430126 1 VALVE ASSY.
9 0G84420128 1 SEAL, VALVE STEM
10 0J39430127 2 PUSH ROD
11 0G84420174 2 LIFTER, VALVE
12 0G84420175 1 CAMSHAFT ASSY
7
Starter
389cc ENGINE
ITEM PART NO. QTY. DESCRIPTION
1
2
7
8
9
0G8442A114 1 STARTER ASSY.
0G84420194 5 BOLT, FLANGE
0G9911 1 ENGINE SWITCH
0G8442A115 1 BLOWER HOUSING, RECOIL STARTER
0G9798 1 ASSY, RECOIL STARTER
8
Flywheel
389cc ENGINE
ITEM PART NO. QTY. DESCRIPTION
1
3 0G84420147 1 FAN COOLING
4 0G84420148 1 PULLEY, STARTER
5 0G84420149 1 NUT SPECIAL, M16
6 0G84420150 1 COIL ASSY., IGNITION
7 0G84420268 2 BOLT, FLANGE
0J25910111 1 FLYWHEEL
9
Air Cleaner and Carburetor
389cc ENGINE
ITEM PART NO. QTY. DESCRIPTION
1 0G84420144 1 GASKET, CARBURETOR
2 0J25910112 1 SPACER, CARBURETOR
3 0G9916 1 GASKET, CARBURETOR
4 0G8442A111 1 CARBURETOR ASSY.
5 0G9757B 1 TUBE, FUEL
6 0G9757A 1 TUBE, FUEL
7 0G9914 1 FILTER
8 048031B 4 CLAMP
9 0G84420156 1 GASKET, CARBURETOR
10 0G8442C111 1 AIR CLEANER
"Not
Shown"
0G84420151 1 AIR CLEANER ELEMENT
10
Control System
389cc ENGINE
ITEM PART NO. QTY. DESCRIPTION
1 0J39430130 1 CONTORL ASSY.
2 0G84420194 3 BOLT, FLANGE, 6×12
3 0J39430131 1 SPRING, GOVERNOR A
4 0J39430132 1 SPRING, GOVERNOR B
5 0J39430133 1 ROD, GOVERNOR
6 0G84420196 1 NUT, FLANGE, M6
7 0G84420197 1 BOLT, GOVERNOR ARM
8 0G84420198 1 ARM, GOVERNOR
11
©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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