The Kohler ECH440 is a 429 cc (24.7 cu·in) natural aspirated single-cylinder four-stroke air-cooled internal combustion small gasoline engine from the Command PRO EFI series with a horizontal shaft, manufactured by Kohler Co for general-purpose applications.
The cylinder bore and the piston stroke are 89.0 mm (3.50 in) and 69.0 mm (2.70 in), respectively. Compression ratio rating is 8.0:1.
The Kohler ECH440 engine produces 14.3 PS (10.5 KW; 14.0 HP) at 3,600 rpm of maximum power and 30.8 Nm (3.14 kg·m; 22.73 ft·lb) at 2,800 rpm of maximum torque.
The Kohler ECH440 features:
- OHV design
- Aluminum cylinder block
- Cast iron cylinder liners
- Swirl-induction combustion chamber
- Electronically controlled ignition system
- Electronic Fuel Injection (EFI) system
- Dual ball bearings
- Steel-forged-andhardened crankshaft
- 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 EFI ECH440 |
| Engine type | 4-stroke, OHV, single-cylinder |
| Displacement | 429 cm 3 (24.7 cu-in) |
| Max. horsepower | 14.3 PS (10.5 KW; 14.0 HP) at 3,600 rpm |
| Max. torque | 30.8 Nm (3.14 kg·m; 22.73 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 | Electronically controlled ignition system |
| Fuel system | Electronic Fuel Injection (EFI) system |
| Fuel used | Unleaded gasoline (octane number 86 or higher) |
| Fuel tank capacity | 7.0 liters (7.4 US.qts, 6.16 Imp. qts) |
| Starting system | Recoil starter |
| PTO shaft rotation | Counterclockwise (from PTO shaft side) |
| Dimensions (L x W X H) | 324 x 452 x 467 mm (12.7 x 17.8 x 18.4 in) |
| Dry weight | 33.0 kg (72.8 lbs) |
Cylinder Block and Head
| Cylinder block | |
| Compression ratio: | 8.0:1 |
| Cylinder bore: | 89.0 mm (3.50 in) |
| Piston stroke: | 69.0 mm (2.70 in) |
| Cylinder internal diameter (standard): | 89.000-89.015 mm (3.5039-3.50454 in) |
| Number of piston rings (compression / oil): | 2/1 |
| Piston pin diameter: | 19.992-19.998 mm (0.7871-0.7873 in) |
| Thrust face outer diameter (standard): | 88.955-88.975 mm (3.5020-3.5030 in) |
| Connecting rod big end diameter (standard): | 33.020-33.030 mm (1.3000-1.3004 in) |
| Ring-to-groove side clearance (Top): | 0.045 mm (0.0018 in) |
| Ring-to-groove side clearance (Second): | 0.045 mm (0.0018 in) |
| Ring-to-groove side clearance (Oil): | 0.090-0.150 mm (0.0035-0.0060 in) |
| Ring end gap (Top): | 0.250-0.400 mm (0.0100-0.0160 in) |
| Ring end gap (Second): | 0.640-0.800 mm (0.025-0.032 in) |
| Crankshaft main journal diameter: | PTO end: 34.975-34.989 mm (1.3770-1.3775 in) Flywheel end: 35.009-35.027 mm (1.3783-1.3790 in) |
| Crankpin journal diameter: | 36.975-36.985 mm (1.4557-1.4561 in) |
| Cylinder head | |
| Valve arrangement: | OHV |
| Valves: | 2 |
| Valve head diameter (INTAKE): | 35.875-36.125 mm (1.4124-1.4222 in) |
| Valve head diameter (EXHAUST): | 32.875-33.125 mm (1.2943-1.3041 in) |
| Valve length (INTAKE): | 86.175-86.375 mm (3.3927-3.4006 in) |
| Valve length (EXHAUST): | 86.341-86.541 mm (3.3993-3.4071 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): | 6.545-6.560 mm (0.2577-0.2583 in) |
| Cam lobe profile (INTAKE): | 32.286 mm (1.271 in) |
| Cam lobe profile (EXHAUST): | 32.506 mm (1.280 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: 25.0 Nm (2.6 kgf·m; 18.5 lb·ft) Step 2: 57.5 Nm (5.9 kgf·m; 42.4 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: | Electronic Fuel Injection (EFI) |
| Fuel filter: | In-line fuel filter |
| Ignition system | |
| Type: | Electronically controlled ignition system |
| Spark plug: | Kohler 25 132 27-S, 25 132 32-S, Champion RC12LC4, RC14MCX4 |
| Spark plug gap: | Kohler 25 132 27-S, Champion RC12LC4: 1.02 mm (0.040 in) Kohler 25 132 32-S, Champion RC14MCX4: 1.11 mm (0.044 in) |
References
1. Kohler Command PRO EFI ECH440 & ECH440LE service manual. Kohler Co. 2022.
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