The Kohler ECV850 is a 824 cc (50.3 cu·in) natural aspirated V-twin four-stroke air-cooled internal combustion small gasoline engine from the Command PRO EFI series with a vertical shaft, manufactured by Kohler Co for general-purpose applications.
A 86.0 mm (3.40 in) cylinder bore and 71.0 mm (2.80 in) piston stroke give the ECV850 engine a total of 824 cc of displacement. The compression ratio rating is 8.9:1.
The ECV850 engine produces 27.3 PS (20.1 KW; 27.0 HP) at 3,600 rpm of maximum horsepower and 63.0 Nm (6.4 kg·m; 46.5 ft·lb) of peak torque.
The Kohler ECV850 features:
- OHV design
- Aluminum cylinder block
- Cast iron cylinder liners
- Electronic ignition system
- EFI (electronic fuel injection) system
- Full pressure lubrication system
- Electronic governor or mechanical governor
- Forced air cooling system
- Electric starter
General information
| Engine Specifications | |
| Engine model | Command PRO EFI ECV850 |
| Engine type | 4-stroke, OHV, V-twin |
| Displacement | 824 cm3, (50.3 cu·in) |
| Max. horsepower | 27.3 PS (20.1 KW; 27.0 HP) at 3,600 rpm |
| Max. torque | 63.0 Nm (6.4 kg·m; 46.5 ft·lb) |
| Cooling system | Forced air |
| Air cleaner | High-efficiency, heavy-duty air filters |
| Lubricating system | Full pressure |
| Ignition system | Electronic ignition system |
| Fuel system | EFI (electronic fuel injection) system |
| Governor | Electronic or mechanical |
| Fuel used | Unleaded gasoline (octane number 86 or higher) |
| Starting system | Electric starter |
| PTO shaft rotation | Counterclockwise (from PTO shaft side) |
| Dimensions (L x W X H) | 500 x 521 x 610 mm (19.7 x 20.5 x 24.0 in) |
| Dry weight | 61.7 kg (136.0 lbs) |
Cylinder Block and Head
| Cylinder block | |
| Compression ratio: | 8.9:1 |
| Cylinder bore: | 86.0 mm (3.40 in) |
| Piston stroke: | 71.0 mm (2.80 in) |
| Cylinder internal diameter (standard): | 86.000-86.025 mm (3.3858-3.3868 in) |
| Number of piston rings (compression / oil): | 2/1 |
| Thrust face outer diameter (standard): | 85.956-85.974 mm (3.3841-3.3848 in) |
| Piston pin diameter: | 21.996-22.000 mm (0.8660-0.8661 in) |
| Side clearance (Top): | 0.040-0.080 mm (0.0016-0.0031 in) |
| Side clearance (Second): | 0.030-0.070 mm (0.0012-0.0028 in) |
| Side clearance (Oil): | 0.060-0.190 mm (0.0024-0.0074 in) |
| Ring end gap (Top): | 0.150-0.300 mm (0.0059-0.0118 in) |
| Ring end gap (Second): | 0.650-0.800 mm (0.0256-0.0315 in) |
| Number of main bearings: | 2 |
| Crankshaft main journal diameter: | 44.978-45.000 mm (1.7708-1.7716 in) |
| Crankpin journal diameter: | 53.000-53.150 mm (2.0866-2.0925 in) |
| Cylinder head | |
| Valve arrangement: | OHV, gear driven |
| Valves: | 2 (4 valves in total) |
| Valve head diameter (INTAKE): | 38.600-38.805 mm (1.5197-1.5295 in) |
| Valve head diameter (EXHAUST): | 29.370-29.630 mm (1.1563-1.1665 in) |
| Valve seat angle (INTAKE): | 89° |
| Valve seat angle (EXHAUST): | 89° |
| Valve seat angle (INTAKE): | 45° |
| Valve seat angle (EXHAUST): | 45° |
| Valve steam diameter (INTAKE): | 6.982-7.000 mm (0.2749-0.2756 in) |
| Valve steam diameter (EXHAUST): | 6.970-6.988 mm (0.2744-0.2751 in) |
| Valve margin minimal (INTAKE): | 1.00 mm (0.0393 in) |
| Valve margin minimal (EXHAUST): | 1.00 mm (0.0393 in) |
| Camshaft journal diameter : | 19.920-19.975 mm (0.7842-0.7864 in) |
Tightening torque specs
| Tightening torque specs | |
| Intake manifold mounting | 16.0 Nm (1.6 kgf·m; 11.8 lb·ft) |
| Connecting rod cap fastener | 11.6 Nm (1.2 kgf·m; 8.6 lb·ft) |
| Cylinder head | Step 1: 23.7 Nm (2.4 kgf·m; 17.5 lb·ft) Step 2: 46.9 Nm (4.8 kgf·m; 34.6 lb·ft) |
| Flywheel | 71.6 Nm (7.3 kgf·m; 52.8 lb·ft) |
| Muffler retaining nuts | 27.8 Nm (2.8 kgf·m; 20.5 lb·ft) |
| Spark plug | 27.0 Nm (2.75 kg·m; 20.0 lb·ft) |
Service Data
| Engine | |
| Maximum speed: | 3600±50 rpm |
| Idle speed: | 1200±75 rpm |
| Oil system | |
| Lubrication system: | Full pressure |
| Oil type: | API SJ, or higher |
| Recommended oil: | SAE 10W-30, Kohler PRO 10W-50 |
| Oil capacity: | 2.6 liters (2.75 US.qts, 2.29 Imp. qts) |
| Ignition system | |
| Type: | Electronic ignition system |
| Spark plug: | Champion RA8HC |
| Spark plug gap: | 0.76 mm (0.030 in) |
| Spark plug torque: | 27.0 Nm (2.75 kg·m; 20.0 lb·ft) |
References
1. Kohler Command PRO EFI ECV850, ECV860, ECV870, ECV880 service manual. Kohler Co. 2021.
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