Specifi cations
10 24 690 34 Rev. DKohlerEngines.com
CLEARANCE SPECIFICATIONS
3
CH682 CH732 CH742 CH752
Governor
Governor Cross Shaft-to-Crankcase
Running Clearancet 0.025/0.126 mm (0.0009/0.0049 in.)
Cross Shaft O.D.
New
Max. Wear Limit
7.949/8.000 mm (0.3129/0.3149 in.)
7.936 mm (0.3124 in.)
Governor Gear Shaft-to-Governor Gear
Running Clearance
0.015/0.140 mm (0.0006/0.0055 in.)
Gear Shaft O.D.
New
Max. Wear Limit
5.990/6.000 mm (0.2358/0.2362 in.)
5.977 mm (0.2353 in.)
Ignition
Spark Plug Gap 0.76 mm (0.030 in.)
Module Air Gap 0.203/0.305 mm (0.008/0.012 in.)
Piston, Piston Rings, and Piston Pin
Piston-to-Piston Pin Running Clearance 0.006/0.017 mm (0.0002/0.0007 in.)
Pin Bore I.D.
New
Max. Wear Limit
17.006/17.012 mm (0.6695/0.6698 in.)
17.025 mm (0.6703 in.)
Pin O.D.
New
Max. Wear Limit
16.995/17.000 mm (0.6691/0.6693 in.)
16.994 mm (0.6691 in.)
Top Compression Ring-to-Groove Side Clearance 0.030/0.070 mm (0.001/0.0026 in.)
Middle Compression Ring-to-Groove Side Clearance 00.030/0.070 mm (0.001/0.0026 in.)
Oil Control Ring-to-Groove Side Clearance 0.060/0.190 mm (0.0022/0.0073 in.)
Top Compression Ring End Gap
New Bore 0.100/
0.279 mm
(0.0039/
0.0110 in.)
0.189/0.277 mm
(0.0074/0.0109 in.)
Used Bore (Max) 0.490 mm
(0.0192 in.)
0.531 mm (0.0209 in.)
Middle Compression Ring End Gap
New Bore 1.400/
1.679 mm
(0.0551/
0.0661 in.)
1.519/1.797 mm
(0.0598/0.0708 in.)
Used Bore (Max) 1.941 mm
(0.0764 in.)
2.051 mm (0.0808 in.)
Thrust Face O.D.
New 79.966 mm
(3.1483 in.)
8
82.978 mm (3.2668 in.)
7
Max. Wear Limit 79.821 mm
(3.1426 in.)
8
82.833 mm (3.2611 in.)
7
Piston Thrust Face-to-Cylinder Bore Running
Clearance
New
0.025/
0.068 mm
(0.0010/
0.0027 in.)
8
0.019/0.062 mm (0.0007/0.0024 in.)
7
3
Values are in Metric units. Values in parentheses are English equivalents.
7
Measure 6 mm (0.2362 in.) above bottom of piston skirt at right angles to piston pin.
8
Measure 13 mm (0.5118 in.) above bottom of piston skirt at right angles to piston pin.
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