Specifi cations
8 24 690 06 Rev. CKohlerEngines.com
TORQUE SPECIFICATIONS
3,5
CH18/CH20/
CH22/
CH620-CH640
CH22/CH23/
CH670-CH680
CH25/
CH730/CH740
CH750
Connecting Rod
Cap Fastener (torque in increments)
8 mm straight shank
8 mm step-down
6 mm straight shank
22.7 N·m (200 in. lb.)
14.7 N·m (130 in. lb.)
11.3 N·m (100 in. lb.)
Crankcase
Breather Cover Fastener 7.3 N·m (65 in. lb.)
Oil Drain Plug 13.6 N·m (10 ft. lb.)
Cylinder Head
Fastener (torque in 2 increments)
Nut fi rst to 16.9 N·m (150 in. lb.)
fi nally to 33.9 N·m (300 in. lb.)
Bolt (torque in 2 increments) fi rst to 22.6 N·m (200 in. lb.)
fi nally to 41.8 N·m (370 in. lb.)
Rocker Arm Screw 11.3 N·m (100 in. lb.)
Flywheel
Fan Fastener 9.9 N·m (88 in. lb.)
Flywheel Retaining Screw 66.4 N·m (49 ft. lb.)
Fuel Pump-Pulse
Fastener 2.3 N·m (20 in. lb.)
Governor
Lever Nut 6.8 N·m (60 in. lb.)
Ignition
Spark Plug 27 N·m (20 ft. lb.)
Module Fastener 4.0-6.2 N·m (35-55 in. lb.)
Rectifi er-Regulator Fastener 1.4 N·m (12.6 in. lb.)
Muffl er
Retaining Nut 24.4 N·m (216 in. lb.)
Oil Cooler
Adapter Nipple 27 N·m (20 ft. lb.)
Oil Sentry
™
Pressure Switch 4.5 N·m (40 in. lb.)
Solenoid (Starter)
Mounting Hardware
Nippondenso Starter
Delco-Remy Starter
6.0-9.0 N·m (53-79 in. lb.)
4.0-6.0 N·m (35-53 in. lb.)
Nut, Positive (+) Brush Lead
Nippondenso Starter
Delco-Remy Starter
8.0-12.0 N·m (71-106 in. lb.)
8.0-11.0 N·m (71-97 in. lb.)
Speed Control Bracket
Fastener 10.7 N·m (95 in. lb.) into new holes
7.3 N·m (65 in. lb.) into used holes
3
Values are in Metric units. Values in parentheses are English equivalents.
5
Lubricate threads with engine oil prior to assembly.