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| Home / Engines / Kohler Engines / Kohler CH20S |
Kohler Command CH20S Maintenance
| Engine Model: Kohler Command CH20S |
| Engine Type: 4-cycle V-twin cylinder horizontal shaft gasoline engine |
| Total Displacement: 39.1 cu.in (624 cc) |
| Rated Engine Power: 20.5 Hp (15.3 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) .............. 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 .............. 24 050 13-S
Air Filter Element Part Number (Std) .............. 47 083 03-S
Air Filter Pre-Cleaner Part Number (Std) .............. 24 083 02-S
Primary Air Filter Part Number (HD) .............. 25 083 01-S
Secondary Air Filter Part Number (HD) .............. 25 083 04-S
| Carburetor Adjustment |
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)
Spark Plug Thread Size, mm (in) .............. 14 (0.55)
Spark Plug Torque, Nm (ft-lb) .............. 27 (20)
| Service Intervals |
Service Air Pre-Cleaner (Std) .............. Every 25 hours
Replace Air Cleaner Element (Std) .............. Every 100 hours
Change Engine Oil .............. Every 100 hours
Clean Cooling Areas .............. Every 100 hours
Change Oil Filter .............. Every 200 hours
Check Spark Plug Gap .............. Every 200 hours
Replace Fuel Filter .............. Every 200 hours
Replace Primary Air Cleaner Element (HD) .............. Every 250 hours
Check Secondary Air Cleaner Element (HD) .............. Every 250 hours
Check Carburetor Adjustment .............. Every 300 hours
Check and Adjust Valve Clearance .............. Every 300 hours
Replace Spark Plug .............. Every 500 hours
Replace Secondary Air Cleaner Element (HD) .............. Every 500 hours
| Tightening Torques |
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 |