The Kohler CH395 is a 277 cc (16.9 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 78.0 mm (3.10 in) and 58.0 mm (2.30 in), respectively. Compression ratio rating is 8.5:1.
The Kohler CH395 engine produces 9.7 PS (7.1 KW; 9.5 HP) at 4,000 rpm of maximum power and 18.8 Nm (1.9 kg·m; 13.9 ft·lb) at 2,800 rpm of maximum torque.
The Kohler CH395 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 CH395 |
| Engine type | 4-stroke, OHV, single-cylinder |
| Displacement | 277 cm 3 (16.9 cu-in) |
| Max. horsepower | 9.7 PS (7.1 KW; 9.5 HP) at 4,000 rpm |
| Max. torque | 18.8 Nm (1.9 kg·m; 13.9 ft·lb) at 2,800 rpm |
| Cooling system | Forced air |
| Air cleaner | Quad-Clean heavy-duty 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 | 7.4 liters (7.82 US.qts, 6.51 Imp. qts) |
| Starting system | Recoil starter |
| Governor | Mechanical centrifugal governor |
| PTO shaft rotation | Counterclockwise (from PTO shaft side) |
| Dimensions (L x W X H) | 404 x 427 x 424 mm (15.9 x 16.8 x 16.7 in) |
| Dry weight | 27.8 kg (61.5 lbs) |
Cylinder Block and Head
| Cylinder block | |
| Compression ratio: | 8.5:1 |
| Cylinder bore: | 78.0 mm (3.10 in) |
| Piston stroke: | 58.0 mm (2.30 in) |
| Cylinder internal diameter (standard): | 78.000-78.015 mm (3.0709-3.0714 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): | 77.955-77.975 mm (3.069-3.070 in) |
| Connecting rod big end diameter (standard): | 33.020-33.030 mm (1.3000-1.3004 in) |
| Ring-to-groove side clearance (Top): | 0.070 mm (0.0030 in) |
| Ring-to-groove side clearance (Second): | 0.070 mm (0.0030 in) |
| Ring-to-groove side clearance (Oil): | 0.050-0.190 mm (0.0019-0.0075 in) |
| Ring end gap (Top): | 0.250-0.400 mm (0.0100-0.0160 in) |
| Ring end gap (Second): | 0.650-0.800 mm (0.0260-0.0320 in) |
| Crankshaft main journal diameter: | PTO end: 29.975-29.989 mm (1.1801-1.1807 in) Flywheel end: 30.014-30.027 mm (1.1817-1.1822 in) |
| Crankpin journal diameter: | 32.975-32.985 mm (1.2982-1.2986 in) |
| Cylinder head | |
| Valve arrangement: | OHV |
| Valves: | 2 |
| Valve head diameter (INTAKE): | 30.875-31.125 mm (1.2156-1.2254 in) |
| Valve head diameter (EXHAUST): | 26.875-27.125 mm (1.0581-1.0679 in) |
| Valve length (INTAKE): | 85.340-85.540 mm (3.3598-3.3677 in) |
| Valve length (EXHAUST): | 85.190-84.990 mm (3.3461-3.3539 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): | 6.560-6.575 mm (0.2583-0.2589 in) |
| Valve steam diameter (EXHAUST): | 6.560-6.575 mm (0.2583-0.2589 in) |
| Cam lobe profile (INTAKE): | 32.408 mm (1.276 in) |
| Cam lobe profile (EXHAUST): | 32.120 mm (1.265 in) |
Tightening torque specs
| Tightening torque specs | |
| Connecting rod | 20.0 Nm (2.0 kgf·m; 14.8 lb·ft) |
| Cylinder head (torque in 2 increments) | Step 1: 18.0 Nm (1.8 kgf·m; 13.3 lb·ft) Step 2: 36.0 Nm (3.7 kgf·m; 26.6 lb·ft) |
| Flywheel | 113.0 Nm (11.5 kgf·m; 83.4 lb·ft) |
| Spark plug | 27.0 Nm (2.75 kg·m; 20.0 lb·ft) |
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: | 1.1 liters (1.16 US.qts, 0.97 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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