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| Home / Engines / Kohler Engines / Kohler CH670 |
Kohler Command CH670 Maintenance
| Engine Model: Kohler Command CH670 |
| Engine Type: 4-cycle twin-cylinder horizontal shaft gasoline engine |
| Total Displacement: 41.1 cu.in (674 cc) |
| Rated Engine Power: 22 Hp (16.4 kW) at 3600 rpm |
| Fuel System: One barrel carburetor with fixed main jet |
| Engine Oil and Filters |
Engine Oil Type (Summer Time) .................. SAE 10W-30
Engine Oil Type (Winter Time) .................. SAE 5W-30
Oil Classification (API Service) .................. SJ or higher
Oil Capacity (w/o Filter), L (qts) .................. 1.6 (1.7)
Oil Capacity (with New Filter), L (qts) .................. 1.8 (1.9)
Oil Filter Part Number .............. 52 050 02-S or 12 050 01-S
Fuel Filter Part Number .............. 25 050 22-S
Air Filter Element Part Number .............. 24 083 03-S
Air Filter Pre-Cleaner Part Number .............. 24 083 05-S
| Carburetor Adjustments |
Main Fuel .................. 2-1/2 turns
Idle Fuel .................. 3/4 to 1 full turn
Low Idle Speed, rpm .................. 1200±75
High Idle Speed, rpm .................. 3600±50
| Ignition System |
Spark Plug Type .................. Champion RC12YC
Spark Plug Gap, mm (in) .................. 0.76 (0.030)
Module Air Gap, mm (in) .................. 0.28-0.33 (0.011-0.013)
Thread Size, mm (in) .................. 14 (0.55)
Reach, mm (in) .................. 19.1 (0.75)
Spark Plug Torque, Nm (ft-lbs) .................. 27 (20)
| Service Intervals |
Service Low-Profile Precleaner .................. Every 25 hours
Replace Air Cleaner Element .................. Every 100 hours
Change Engine Oil .................. Every 100 hours
Clean Oil Cooler Fins .................. Every 100 hours
Change Oil Filter .................. Every 200 hours
Replace Fuel Filter .................. Every 200 hours
Check Carburetor Adjustment .................. Every 200 hours
Check and Adjust Valve Clearance .................. Every 500 hours
Check Spark Plug Condition and Gap .................. Every 500 hours
Replace Spark Plug .................. Every 500 hours
| Tightening Torque Specs |
Cylinder Head Nut, Nm (ft-lb) .................. 16.9-33.9 (12.5-25.1)
Cylinder Head Bolt, Nm (ft-lb) .................. 22.6-41.8 (16.7-30.8)
Rocker Arm Screw, Nm (ft-lb) .................. 11.3 (8.3)
Connecting Rod Cap, Nm (ft-lb) .................. 11.3 (8.3)
Flywheel Retaining Screw, Nm (ft-lb) .................. 66.4 (49.1)
Intake Manifold Mounting, Nm (ft-lb) .................. 7.4 (5.5)
Carburetor Mounting Nut, Nm (ft-lb) .................. 6.2-7.3 (4.6-5.4)
Closure Plate, Nm (ft-lb) .................. 24.4 (18.1)
Oil Drain Plug, Nm (ft-lb) .................. 13.6 (10.1)
Governor Lever Nut, Nm (ft-lb) .................. 6.8 (5.1)
Ignition Module, Nm (ft-lb) .................. 4.0-6.2 (2.9-4.6)
Muffler Retaining Nut, Nm (ft-lb) .................. 24.4 (18.1)
Fuel Pump Screw, Nm (ft-lb) .................. 2.3 (1.7)
Spark Plug, Nm (ft-lb) .................. 27 (20.1)
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| Engines Technical Specifications |