Generac Power Systems MC User Manual
Page 7
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1.1.6-ENGINE SPECIFICATIONS
INCHES
METRIC
Spark Plug Gap
0.035
0.009 mm
Valve Spring Length
1.2995
33.000 mm
Valve Spring Compression Length
1.0236
26.000 mm
Valve Seat Width
0.039-
0.079
1-2 mm
Valve Tappet Clearance
0.0039-
0.0078
0.1-0.2 mm
Crankshaft End Play
0.0039-
0.0118
0.1-0.3 mm
Piston Diameter (at skirt)
3.067-
3.068
77.91-
77.93 mm
Piston Pin Diameter
0.7080-
0.7086
17.989 mm-
18.000 mm
Width of Compression Grooves
0.0797-
0.0805
2.025 mm-
2.045 ram
Width of Oil Ring Groove
0.1584-
0.1593
4.025 mm-
4.045 mm
Width of Compression Rings
0.0775-
0.0784
1.970 mm-
1.990 mm
Width of Oil Ring
0.1560-
0.1570
3.970 mm-
3.990 mm
Ring End Gap
0.0078-
0.0157
0.2 - 0.4
mm
Maximum Permissible Out-of-Roundness
of Crankpin
0.002
0.05 mm
Connecting Rod to Crankpin Clearance
0.001-
0.002
0.030-
0.050 mm
Valve Spring Force
14.81-
19.76 lbs
kilograms
6.72-8.96
1
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