® Engine Parts Manual 420cc (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.
420cc ENGINE Cylinder Head ITEM PART NO. QTY. DESCRIPTION 1 0J35240147 6 BOLT, FLANGE 2 0J39340112 1 COVER, VALVE 3 0J39340113 1 GASKET, VALVE COVER 4 0J39340114 1 TUBE, BREATHER 5 0G84420211 4 BOLT, HEAD FLNG.
420cc ENGINE Crankcase ITEM PART NO. QTY. DESCRIPTION 1 0G84420217 2 BOLT, FLANGE 2 0G84420105 1 SWITCH ASSY., OIL LEVEL 3 0G84420118 1 BEARING, RADIAL BALL 6202 4 0G84420218 1 WASHER, FLAT 8*16*1.2 5 0G84420219 1 PIN, LOCK, 10MM 6 0G84420220 1 SHAFT, GOVERNOR ARM 7 0G84420108 1 SEAL, OIL 8 0G84420110 2 BOLT, DRAIN PLUG 9 0G84420109 2 WASHER, DRAIN PLUG, 12MM 10 0H98380100 1 CRANKCASE, (ELECT.
20cc ENGINE Crankcase Cover ITEM PART NO. QTY. DESCRIPTION 1 0G9799 2 DIPSTICK/CAP ASSY 2 0G84420221 1 GOVERNOR ASSY.
420cc ENGINE Crankshaft and Piston ITEM PART NO. QTY.
420cc ENGINE Rocker and Camshaft ITEM PART NO. QTY. DESCRIPTION 1 0J39430124 1 ROCKER ARM EXH. 2 0J39430125 1 ROCKER ARM INT. 3 0J93060101 2 VALVE ROCKER SHAFT 4 0J39430127 2 PUSH ROD 5 0G84420174 2 LIFTER, VALVE 6 0G84420122 2 ROTATOR, VALVE 7 0G84420239 4 LOCKER, VALVE 8 0G84420123 2 RETAINER, VALVE SPRING 9 0G84420124 2 SPRING, VALVE 10 0G84420125 1 SEAT, VALVE SPRING 11 0G84420128 1 SEAL, VALVE STEM 12 0J39430126 1 VALVE ASSY.
420cc ENGINE Starter ITEM PART NO. QTY. DESCRIPTION 1 0H9838D102 1 STARTER, RECOIL W/HSNG. 2 0G84420241 4 BOLT, FLANGE 6×8 3 0J0813AST15 1 STARTER ASSY. 4 0G8442A115 1 COVER COMP.
420cc ENGINE Flywheel and Ignition ITEM PART NO. QTY. DESCRIPTION 1 0G84420150 1 COIL ASSY. , IGNITION 2 0G84420267 1 GROMMET, CORD 3 0G84420268 2 BOLT, FLANGE, M6X25 4 0H98380104 1 FLYWHEEL, (ELECT. START) COMP.
420cc ENGINE Air Cleaner and Carburetor ITEM PART NO. QTY. DESCRIPTION 1 0G84420144 1 GASKET, INSULATOR 2 0J25910112 1 SPACER, CARBURETOR 3 0G9916 1 GASKET, CARB. TO SPACER 4 0H9838E110 1 CARBURETOR ASSY 5 0K65110119 1 HOSE, FUEL 6 0K65110118 1 FILTER, FUEL(IN-LINE) 7 0H9838C110 2 CLAMP, HOSE 8 0G84420156 1 GASKET, CARB.
420cc ENGINE Control System ITEM PART NO. QTY. DESCRIPTION 1 0G8442G111 1 CONTROL ASSY.
420cc ENGINE Exhaust Manifold ITEM PART NO. QTY. DESCRIPTION 1 0J4535A 1 MANIFOLD, EXH. PIPE 2 0J35220161 5 NUT, HEX.
420cc ENGINE Starter Motor ITEM PART NO. 1 0H9838E111 1 MOTOR ASSY., STARTER 2 0H98380103 2 BOLT, FLANGE, 3 0H98380101 1 MOTOR, STARTER 4 0H98380102 1 CONTACTOR ASSY 5 0J4968 2 BOLT, FLANGE, Manual No. 0H9838EPMNL QTY. DESCRIPTION Revision A (06/19/14) Printed In U.S.A.
