Generac Power Systems OHVI GSH 220 - Crankcase Assembly Specifications; Crankcase Cover Assembly Specifications; Crankshaft Specifications

14-2
SECTION 14: SPECIFICATIONS - SMALL FRAME ENGINES
CRANKCASE ASSEMBLY
MODEL GN-190 GN-191 GN/GSH-220
CYLINDER BORE DIAMETER
2.756-2.757 INCH
(70.000-70.025MM)
2.756-2.757 INCH
(70.000-70.025MM)
2.953-2.954 INCH
(75.000-75.025MM)
VALVE TAPPET BORE DIAMETER
0.295-0.296 INCH
(7.494-7.520MM)
0.295-0.296 INCH
(7.494-7.520MM)
0.295-0.296 INCH
(7.494-7.520MM)
CRANKSHAFT SLEEVE BEARING
DESIGN DIAMETER
*(WHERE APPLICABLE)
1.104-1.106 INCH
(28.044-28.099MM)
1.104-1.106 INCH
(28.044-28.099MM)
1.104-1.106 INCH
(28.044-28.099MM)
GOVERNOR ARM BORE
DIAMETER
0.239-0.240 INCH
(6.07-6.10MM)
0.239-0.240 INCH
(6.07-6.10MM)
0.239-0.240 INCH
(6.07-6.10MM)
CAMSHAFT BEARING
DIAMETER
1.024-1.025 INCH
(26.00-26.03MM)
1.024-1.025 INCH
(26.00-26.03MM)
1.024-1.025 INCH
(26.00-26.03MM)
GOVERNOR ARM DIAMETER
0.235-0.237 INCH
(5.97-6.03MM)
0.235-0.237 INCH
(5.97-6.03MM)
0.235-0.237 INCH
(5.97-6.03MM)
*Later model small frame GN engines have no crankshaft sleeve bearing.
CRANKCASE COVER ASSEMBLY
MODEL GN-190 GN-191 GN/GSH-220
CRANKSHAFT BEARING
BORE DIAMETER
1.104-1.105 inch
(28.040-28.065mm)
1.104-1.105 inch
(28.040-28.065mm)
1.104-1.105 inch
(28.040-28.065mm)
CAMSHAFT BEARING BORE
DIAMETER
1.299-1.300 inch
(33.00-33.03mm)
1.299-1.300 inch
(33.00-33.03mm)
1.299-1.300 inch
(33.00-33.03mm)
GOVERNOR GEAR SHAFT
DIAMETER
0.236-0.237 inch
(6.004-6.012mm)
0.236-0.237 inch
(6.004-6.012mm)
0.236-0.237 inch
(6.004-6.012mm)
OIL PUMP INNER ROTOR
SHAFT DIAMETER
DIAMETER
0.353-0.354 inch
(8.969-8.987mm)
0.353-0.354 inch
(8.969-8.987mm)
0.353-0.354 inch
(8.969-8.987mm)
CRANKSHAFT
MODEL GN-190 GN-191 GN/GSH-220
ALLOWABLE END PLAY
0.006-0.023 inch
(0.14-0.60mm)
0.006-0.023 inch
(0.14-0.60mm)
0.006-0.023 inch
(0.14-0.60mm)
CRANKPIN DIAMETER
1.180-1.181 inch
(29.99-30.01mm)
1.180-1.181 inch
(29.99-30.01mm)
1.180-1.181 inch
(29.99-30.01mm)
MAIN BEARING DIAMETER
(FLYWHEEL END)
1.102-1.103 inch
(28.000-28.012mm)
1.102-1.103 inch
(28.000-28.012mm)
1.102-1.103 inch
(28.000-28.012mm)
MAIN BEARING DIAMETER
(PTO END)
1.102-1.103 inch
(28.000-28.012mm)
1.102-1.103 inch
(28.000-28.012mm)
1.102-1.103 inch
(28.000-28.012mm)
0C1103Arev0.indd 2 6/22/2006 10:51:55 AM