Kohler / Rehlko · Garland, Texas
CH640
Base-model engine information. Use the complete engine-label specification to confirm the configuration for your equipment.
- Shaft orientation
- Horizontal
- Gross power
- 20.5 (15.3) hp (kW) @ 3600 rpm
- Displacement
- 674 (41.1) cc (cu in)
Base-model specifications
These specifications describe the base engine, not an exact ordering configuration or a guaranteed replacement fit.
- Shaft orientation
- Horizontal
- Fuel
- Gasoline
- Cylinder configuration
- V-twin
- Cooling
- Air-cooled
- Gross power
- 20.5 (15.3) hp (kW) @ 3600 rpm
- Displacement
- 674 (41.1) cc (cu in)
- Bore
- 3.1 (80) in (mm)
- Stroke
- 2.6 (67) in (mm)
- Peak torque
- 35.7 (48.4) ft-lb (Nm) @ 2400 rpm
- Compression ratio
- 8.5:1
- Dry weight
- 90 (41) lb (kg)
- Oil capacity
- 2.0 (1.9) U.S. qt (L)
- Lubrication
- Full-pressure lubrication with full-flow filter
- Dimensions with heavy-duty air cleaner (L × W × H)
- 14 × 17.7 × 26.5 (355 × 451 × 672) in (mm)Length is front to rear of engine. Width is valve cover to valve cover. Height is mounting surface to top of air cleaner.
Engine features
- Four-cycle
- OHV
- Cast-iron cylinder liners
- Aluminum block
- High-performance spark plugs
- Hydraulic valve lifters
- Large-capacity air, fuel and oil filters
- Heavy-duty air cleaner
Configuration details
Dimensions and shown equipment depend on the air-cleaner configuration; confirm the complete engine specification before replacement.