The Kohler CH260 is a 208 cc (12.7 cu·in) natural aspirated single-cylinder four-stroke air-cooled internal combustion small gasoline engine from the Command PRO series with a horizontal shaft, manufactured by Kohler Co for general-purpose applications, such as concrete trowel, concrete screed, log splitter, go-kart, edger, air compressor, tiller, pump, pressure washer and etc.
The cylinder bore and the piston stroke are 70.0 mm (2.80 in) and 54.0 mm (2.10 in), respectively. Compression ratio rating is 8.5:1.
The Kohler CH260 engine produces 6.0 PS (4.5 KW; 6.0 HP) at 3,600 rpm of maximum power and 14.1 Nm (1.44 kg·m; 10.41 ft·lb) at 3,000 rpm of maximum torque.
The Kohler CH260 features:
- OHV design
- Aluminum cylinder block
- Cast iron cylinder liners
- Swirl-induction combustion chamber
- Dependable magneto breakerless ignition
- One-barrel carburetor with fixed main jet
- Dual ball bearings
- Steel-forged-andhardened crankshaft
- Mechanical centrifugal governor
- Splash type lubrication system
- Forced air cooling system
- Recoil starter (12-volt starter available as an option)
General information
| Engine Specifications | |
| Engine model | Command PRO CH260 |
| Engine type | 4-stroke, OHV, single-cylinder |
| Displacement | 208 cm 3 (12.7 cu-in) |
| Max. horsepower | 6.0 PS (4.5 KW; 6.0 HP) at 3,600 rpm |
| Max. torque | 14.1 Nm (1.44 kg·m; 10.41 ft·lb) at 3,000 rpm |
| Cooling system | Forced air |
| Air cleaner | Quad-Clean heavyduty cyclonic air cleaner |
| Lubricating system | Splash type lubrication |
| Ignition system | Dependable magneto breakerless ignition |
| Fuel system | One-barrel carburetor with fixed main jet |
| Fuel used | Unleaded gasoline (octane number 86 or higher) |
| Fuel tank capacity | 4.0 liters (4.2 US.qts, 3.5 Imp. qts) |
| Starting system | Recoil starter |
| Governor | Mechanical centrifugal governor |
| PTO shaft rotation | Counterclockwise (from PTO shaft side) |
| Dimensions (L x W X H) | 323 x 385 x 361 mm (12.7 x 15.2 x 14.2 in) |
| Dry weight | 17.5 kg (38.7 lbs) |
Cylinder Block and Head
| Cylinder block | |
| Compression ratio: | 8.5:1 |
| Cylinder bore: | 70.0 mm (2.80 in) |
| Piston stroke: | 54.0 mm (2.10 in) |
| Cylinder internal diameter (standard): | 70.020-70.035 mm (2.7570-2.7573 in) |
| Number of piston rings (compression / oil): | 2/1 |
| Piston pin diameter: | 17.992-17.998 mm (0.7083-0.7084 in) |
| Thrust face outer diameter (standard): | 69.975-69.995 mm (2.755-2.756 in) |
| Connecting rod big end diameter (standard): | 30.020-30.030 mm (1.1819-1.1823 in) |
| Ring-to-groove side clearance (Top): | 0.040-0.150 mm (0.0020-0.0060 in) |
| Ring-to-groove side clearance (Second): | 0.040-0.150 mm (0.0020-0.0060 in) |
| Ring-to-groove side clearance (Oil): | 0.050-0.190 mm (0.0019-0.0075 in) |
| Ring end gap (Top): | 0.325-0.400 mm (0.0130-0.0160 in) |
| Ring end gap (Second): | 0.325-0.400 mm (0.0130-0.0160 in) |
| Crankshaft main journal diameter: | 29.975-29.985 mm (1.1801-1.1805 in) |
| Crankpin journal diameter: | 24.975-24.989 mm (0.9833-0.9838 in) |
| Cylinder head | |
| Valve arrangement: | OHV |
| Valves: | 2 |
| Valve head diameter (INTAKE): | 26.875-27.125 mm (1.0581-1.0679 in) |
| Valve head diameter (EXHAUST): | 24.875-25.125 mm (0.9793-0.9892 in) |
| Valve length (INTAKE): | 63.300-63.900 mm (2.4921-2.5157 in) |
| Valve length (EXHAUST): | 63.300-63.900 mm (2.4921-2.5157 in) |
| Valve seat angle (INTAKE): | 89.5°-90.5° |
| Valve seat angle (EXHAUST): | 89.5°-90.5° |
| Valve seat angle (INTAKE): | 89.5°-90.5° |
| Valve seat angle (EXHAUST): | 89.5°-90.5° |
| Valve steam diameter (INTAKE): | 5.500 mm (0.2170 in) |
| Valve steam diameter (EXHAUST): | 5.438 mm (0.2140 in) |
| Cam lobe profile (INTAKE): | 27.787 mm (1.094 in) |
| Cam lobe profile (EXHAUST): | 27.861 mm (1.097 in) |
Tightening torque specs
| Tightening torque specs | |
| Connecting rod | 12.5 Nm (1.3 kgf·m; 9.2 lb·ft) |
| Cylinder head (torque in 2 increments) | Step 1: 12.0 Nm (1.2 kgf·m; 8.9 lb·ft) Step 2: 24.0 Nm (2.4 kgf·m; 17.7 lb·ft) |
| Flywheel | 74.0 Nm (7.5 kgf·m; 54.6 lb·ft) |
| Spark plug | 27.0 Nm (2.75 kg·m; 20.0 ft·lb) |
Service Data
| Valve lash | |
| Intake/Exhaust: | 0.0762-0.1270 mm (0.0030-0.0050 in) |
| Oil system | |
| Lubrication system: | Splash type |
| Oil type: | API SJ or higher |
| Recommended oil: | SAE 10W-30 |
| Oil capacity: | 0.6 liters (0.63 US.qts, 0.53 Imp. qts) |
| Fuel system | |
| Type: | Carburetor with fixed main jet |
| Fuel filter: | In-line fuel filter |
| Ignition system | |
| Type: | Dependable magneto breakerless ignition |
| Spark plug: | Kohler 1413214-S |
| Spark plug gap: | 0.76 mm (0.030 in) |
| Module air gap | 0.254 mm (0.010 in) |
References
1. Kohler Command PRO CH245-CH440 service manual. Kohler Co. 2021.
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