Kohler COMMAND CH20 Service Manual

1.12
Section 1
Safety and General Information
Ignition
Spark Plug Type (Champion
®
or Equivalent) ..................................................... RC12YC, XC12YC, or Platinum 3071
Spark Plug Gap ....................................................................................................... 0.76 mm (0.030 in.)
Spark Plug Torque .................................................................................................. 24.4-29.8 N·m (18-22 ft. lb.)
Ignition Module Air Gap ....................................................................................... 0.28/0.33 mm (0.011/0.013 in.)
Ignition Module Fastener Torque ......................................................................... 4.0-6.2 N·m (35-55 in. lb.)
Speed Sensor Air Gap (EFI engines) ..................................................................... 1.50 ± 0.25 mm (0.059 ± 0.010 in.)
Muffler
Muffler Retaining Nut Torque .............................................................................. 24.4 N·m (216 in. lb.)
Oil Filter
Oil Filter Torque ...................................................................................................... 3/4-1 turn after gasket contact
Oil Cooler
Oil Cooler/Adapter Nipple Torque ...................................................................... 27 N·m (20 ft. lb.)
Piston, Piston Rings, and Piston Pin
Piston-to-Piston Pin Running Clearance ............................................................ 0.006/0.017 mm (0.0002/0.0007 in.)
Piston Pin Bore I.D.
New .................................................................................................................. 17.006/17.012 mm (0.6695/0.6698 in.)
Max. Wear Limit ............................................................................................. 17.025 mm (0.6703 in.)
Piston Pin O.D.
New .................................................................................................................. 16.995/17.000 mm (0.6691/0.6693 in.)
Max. Wear Limit ............................................................................................. 16.994 mm (0.6691 in.)
Top Compression Ring-to-Groove Side Clearance
CH18, CH20, CH22 (624 cc) ........................................................................... 0.040/0.080 mm (0.0016/0.0031 in.)
CH22/23 (674 cc) ............................................................................................. 0.030/0.076 mm (0.0012/0.0030 in.)
CH25, CH26, CH730-750 ............................................................................... 0.025/0.048 mm (0.0010/0.0019 in.)
Middle Compression Ring-to-Groove Side Clearance
CH18, CH20, CH22 (624 cc) ........................................................................... 0.040/0.080 mm (0.0016/0.0031 in.)
CH22/23 (674 cc) ............................................................................................. 0.030/0.076 mm (0.0012/0.0030 in.)
CH25, CH26, CH730-750 ............................................................................... 0.015/0.037 mm (0.0006/0.0015 in.)
Oil Control Ring-to-Groove Side Clearance
CH18, CH20, CH22 (624 cc) ........................................................................... 0.060/0.202 mm (0.0024/0.0080 in.)
CH22/23 (674 cc) ............................................................................................. 0.046/0.196 mm (0.0018/0.0077 in.)
CH25, CH26, CH730-750 ............................................................................... 0.026/0.176 mm (0.0010/0.0070 in.)

Kohler COMMAND CH20 Specifications

General

Brand	Kohler
Model	COMMAND CH20
Category	Engine
Language	English