________________________________________________________________________________________
Kohler Command CH20S Specs
| 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 Model .............. Kohler Command CH20S
Engine Type .............. 4-cycle V-Twin cylinder horizontal shaft air-cooled gasoline engine
Number of Cylinders .............. 2
Displacement, cc (cu.in) .............. 624 (39.1)
Piston Bore, mm (in) .............. 77.0 (3.03)
Engine Stroke, mm (in) .............. 67.0 (2.64)
Maximum Engine Power, hp (kW) .............. 20.5 (15.3)
Maximum Engine Speed, rpm .............. 3600
Peak Torque, Nm (ft-lb) .............. 44.3 (32.7)
Torque Speed, rpm .............. 2200
Compression Ratio .............. 8.5:1
Compression Ratio .............. 8.5:1
Lubrication System .............. Full pressure
Oil Filter Type .............. Full-flow
Air Cleaner Type .............. Replaceable, paper element
Ignition System .............. Electronic magneto
Starting System .............. Electric starter
Electrical System Rating, Volts .............. 12
Fuel System Type .............. Carburetor
Carburetor Model .............. Keihin
Carburetor Type .............. One-barrel, fixed main jet
Fuel Pump Type .............. Pulse, mechanical
Fuel Filter Type .............. In-line
Governor Type .............. Mechanical
Overall Length, mm (in) .............. 349 (13.8)
Overall Width, mm (in) .............. 448 (17.7)
Overall Height, mm (in) .............. 481 (19.0)
Dry weight, kg (lbs) .............. 41.0 (90)
Cylinder Bore Inside Diameter (Std), mm (in) .............. 77.000-77.025 (3.0315-3.0325)
Cylinder Bore Inside Diameter (Max), mm (in) .............. 77.063 (3.0340)
Cylinder Bore (Max Out of Round), mm (in) .............. 0.12 (0.0047)
Crankshaft End Play (Free), mm (in) .............. 0.070-0.590 (0.0028-0.0230)
Crankshaft Bore (Crankcase), mm (in) .............. 40.965-41.003 (1.6128-1.6143)
Crankshaft Bore (Closure Plate), mm (in) .............. 40.987-40.974 (1.6136-1.6131)
Crankshaft Bore to Crankshaft Clearance, mm (in) .............. 0.039-0.074 (0.0015-0.0029)
Connecting Rod Journal Outside Diameter, mm (in) .............. 35.955-35.973 (1.4156-1.4163)
Connecting Rod to Crankpin Clearance, mm (in) .............. 0.030-0.055 (0.0012-0.0022)
Connecting Rod to Crankpin Side Clearance, mm (in) .............. 0.26-0.63 (0.0102-0.0248)
Connecting Rod to Piston Pin Clearance, mm (in) .............. 0.015-0.028 (0.0006-0.0011)
Camshaft End Play, mm (in) .............. 0.076-0.127 (0.0030-0.0050)
Camshaft Clearance, mm (in) .............. 0.025-0.063 (0.0010-0.0025)
Camshaft Bore Inside Diameter, mm (in) .............. 20.000-20.025 (0.7874-0.7884)
Camshaft Bearing Outside Diameter, mm (in) .............. 19.962-19.975 (0.7859-0.7864)
Cylinder Head (Max Out of Flatness), mm (in) .............. 0.076 (0.003)
Hydraulic Valve Lifter to Crankcase Clearance, mm (in) .............. 0.0241-0.0501 (0.0009-0.0020)
Valve Stem to Valve Guide Clearance (Intake), mm (in) .............. 0.038-0.076 (0.0015-0.0030)
Valve Stem to Valve Guide Clearance (Exhaust), mm (in) .............. 0.050-0.088 (0.0020-0.0035)
Valve Guide Inside Diameter, mm (in) .............. 7.038-7.058 (0.2771-0.2779)
Valve Minimum Lift (Intake), mm (in) .............. 8.07 (0.3177)
Valve Minimum Lift (Exhaust), mm (in) .............. 8.07 (0.3177)
Valve Face Angle, degrees .............. 45
Valve Seat Angle, degrees .............. 89
Valve Insert Outside Diameter (Intake), mm (in) .............. 36.987-37.013 (1.4562-1.4572)
Valve Insert Outside Diameter (Exhaust), mm (in) .............. 32.987-33.013 (1.2987-1.2997)
Valve Guide Depth, mm (in) .............. 6.50 (0.2559)
Valve Head Diameter (Intake), mm (in) .............. 33.37-33.63 (1.3138-1.3240)
Valve Head Diameter (Exhaust), mm (in) .............. 29.37-29.63 (1.1563-1.1665)
Valve Stem Diameter (Intake), mm (in) .............. 6.982-7.000 (0.2749-0.2756)
Valve Stem Diameter (Exhaust), mm (in) .............. 6.970-6.988 (0.2744-0.2751)
Piston Outside Diameter (Std), mm (in) .............. 76.967-76.985 (3.0302-3.0309)
Piston Outside Diameter (Wear Limit), mm (in) .............. 76.840 (3.0252)
Piston to Cylinder Bore Clearance, mm (in) .............. 0.014-0.057 (0.0005-0.0022)
Piston to Piston Pin Clearance, mm (in) .............. 0.006-0.017 (0.0002-0.0007)
Piston Pin Bore Inside Diameter, mm (in) .............. 17.006-17.012 (0.6695-0.6698)
Piston Pin Outside Diameter, mm (in) .............. 16.995-17.000 (0.6691-0.6693)
Top Ring Groove Clearance, mm (in) .............. 0.040-0.080 (0.0016-0.0031)
Second Ring Groove Clearance, mm (in) .............. 0.040-0.080 (0.0016-0.0031)
Oil Ring Groove Clearance, mm (in) .............. 0.060-0.202 (0.0024-0.0080)
Top Ring End Gap, mm (in) .............. 0.25-0.45 (0.0100-0.0177)
Second Ring End Gap, mm (in) .............. 0.25-0.45 (0.0100-0.0177)
________________________________________________________________________________________
________________________________________________________________________________________
| Engines Technical Specifications |
| Lawn and Garden Tractors Technical Specs |
| Farm Tractors Technical Specifications |
