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Kohler Command CH670 Specs
| 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 Model .................. Kohler Command CH670
Engine Type .................. 4-cycle horizontal shaft V-Twin air-cooled gasoline
Number of Cylinders .................. 2
Displacement, cc (cu.in) .................. 674 (41.1)
Cylinder Bore, mm (in) .................. 80.0 (3.15)
Piston Stroke, mm (in) .................. 67.0 (2.64)
Rated Engine Power, hp (kW) .................. 22.0 (16.4)
Rated Engine Speed, rpm .................. 3600
Maximum Torque, Nm (ft-lbs) .................. 49.1 (36.2)
Torque Speed, rpm .................. 2400
Compression Ratio .................. 8.5:1
Lubrication System .................. Full pressure
Oil Filter .................. Full-flow type
Air Cleaner .................. Replaceable, paper element
Oil Capacity, L (qts) .................. 1.8 (1.9)
Electrical System Rating, Volts .................. 12
Starter Type .................. Electric
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) .................. 350 (14.0)
Overall Width, mm (in) .................. 450 (17.7)
Overall Height, mm (in) .................. 480 (19.0)
Net Weight, kg (lbs) .................. 41 (90)
Cylinder Bore I.D (Standard), mm (in) .................. 80.000-80.025 (3.1496-3.1506)
Cylinder Bore I.D (Wear Limit), mm (in) .................. 80.065 (3.1522)
Cylinder Bore (Max Out of Round), mm (in) .................. 0.12 (0.0047)
Cylinder Bore Max Taper, mm (in) .................. 0.05 (0.0020)
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)
Crankshaft Bearing Journal O.D (Flywheel), mm (in) .............. 40.913-40.935 (1.6107-1.6116)
Crankshaft Bearing Journal Max Taper (Flywheel), mm (in) .................. 0.022 (0.0009)
Crankshaft Bearing Journal O.D (Closure Plate), mm (in) .......... 40.913-40.935 (1.6107-1.6116)
Crankshaft Bearing Journal Max Taper (Closure Plate), mm (in) .................. 0.022 (0.0009)
Crankshaft T.I.R (PTO End, Crank in Engine), mm (in) .................. 0.279 (0.0110)
Crankshaft T.I.R (Entire Crank, in V-Blocks), mm (in) .................. 0.10 (0.0039)
Connecting Rod Journal O.D, mm (in) .................. 35.955-35.973 (1.4156-1.4163)
Connecting Rod Journal Max Taper, mm (in) .................. 0.018 (0.0007)
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)
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)
Intake Valve Stem to Valve Guide Clearance, mm (in) .................. 0.038-0.076 (0.0015-0.0030)
Exhaust Valve Stem to Valve Guide Clearance, mm (in) .................. 0.050-0.088 (0.0020-0.0035)
Intake Valve Guide I.D, mm (in) .................. 7.038-7.058 (0.2771-0.2779)
Exhaust Valve Guide I.D, mm (in) .................. 7.038-7.058 (0.2771-0.2779)
Valve Guide Reamer Size (Standard), mm (in) .................. 7.048 (0.2775)
Valve Guide Reamer Size (0.25 Oversize), mm (in) .................. 7.298 (0.2873)
Intake Valve Minimum Lift, mm (in) .................. 8.07 (0.3177)
Exhaust Valve Minimum Lift, mm (in) .................. 8.07 (0.3177)
Nominal Valve Face Angle, degrees .................. 45
Valve Seat Angle (Intake/Exhaust), degrees .................. 89
Intake Valve Insert O.D, mm (in) .................. 36.987-37.013 (1.4562-1.4572)
Exhaust Valve Insert O.D, mm (in) .................. 32.987-33.013 (1.2987-1.2997)
Intake Valve Guide Depth, mm (in) .................. 4.00 (0.1575)
Exhaust Valve Guide Depth, mm (in) .................. 6.50 (0.2559)
Intake Valve Head Diameter, mm (in) .................. 33.37-33.63 (1.3138-1.3240)
Exhaust Valve Head Diameter, mm (in) .................. 29.37-29.63 (1.1563-1.1665)
Intake Valve Stem Diameter, mm (in) .................. 6.982-7.000 (0.2749-0.2756)
Exhaust Valve Stem Diameter, mm (in) .................. 6.970-6.988 (0.2744-0.2751)
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 I.D, mm (in) .................. 20.000-20.025 (0.7874-0.7884)
Camshaft Bearing Surface O.D, mm (in) .................. 19.962-19.975 (0.7859-0.7864)
Piston to Piston Pin Clearance, mm (in) .................. 0.006-0.017 (0.0002-0.0007)
Piston Pin Bore I.D, mm (in) .................. 17.006-17.012 (0.6695-0.6698)
Piston Pin O.D, mm (in) .................. 16.995-17.000 (0.6691-0.6693)
Top Ring Groove Clearance, mm (in) .................. 0.030-0.076 (0.0012-0.0030)
Second Ring Groove Clearance, mm (in) .................. 0.030-0.076 (0.0012-0.0030)
Oil Ring Groove Clearance, mm (in) .................. 0.046-0.196 (0.0018-0.0077)
Top Ring End Gap, mm (in) .................. 0.18-0.46 (0.0071-0.0181)
Second Ring End Gap, mm (in) .................. 0.18-0.46 (0.0071-0.0181)
Piston O.D (Standard), mm (in) .................. 79.963-79.979 (3.1481-3.1488)
Piston O.D (Wear Limit), mm (in) .................. 79.831 (3.1430)
Piston to Cylinder Bore Clearance, mm (in) .................. 0.021-0.062 (0.0008-0.0024)
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