Generac 420cc (G19) user guide
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.generac.com.
Cylinder Head
420cc ENGINE
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., 10×80
6 0G84420210 2 BOLT, STUD, EXHAUST
7 0J00620106 1 SPARK PLUG
8 0J39340115 1 HEAD, CYLINDER
9 0J00620107 1 GASKET, CYLINDER HEAD
10 0G84420212 2 PIN, DOWEL
11 0K0090 2 BOLT, STUD, INTAKE
2
Crankcase
420cc ENGINE
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. START)
11 0J35250337 1 CLEAT, CABLE
12 0G84420194 1 BOLT, FLANGE, 6×12
13 0G84420112 1 ALERT UNIT,OIL
14 0G84420194 1 BOLT, FLANGE, 6×12
15 0G84420116 1 SEAL, OIL
3
Crankcase Cover
420cc ENGINE
ITEM PART NO. QTY. DESCRIPTION
1 0G9799 2 DIPSTICK/CAP ASSY
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, CRANKCASE COVER
7 0G84420116 1 SEAL, OIL
8 0G84420227 1 CRANKCASE COVER
9 0G84420229 7 BOLT, FLANGE 8X40
4
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