The Kohler PCV850 is a 824 cc, (50.3 cu·in) V-twin air-cooled four-stroke internal combustion propane engine from the Command PRO EFI Propane series, manufactured by Kohler Co.
The Kohler PCV850 engine has an OHV (overhead valve) design, an aluminum block with cast iron cylinder liners, a vertical PTO-shaft, pressurized lubrication system. This engine is equipped with an EFI (Electronic Fuel Injection) system and electronic ignition system, an electronic governor or a mechanical governor.
The cylinder bore and the piston stroke are 86.0 mm (3.40 in) and 71.0 mm (2.80 in), respectively. Compression ratio rating is 8.9:1.
The Kohler PCV850 engine produced 27.3 PS (20.1 KW; 27.0 HP) at 3,600 rpm of horsepower and 61.2 Nm (6.2 kg·m; 45.2 ft·lb) at 2,400 rpm of peak torque.
The breakdown of the engine code is as follows:
- P – EFI Propane series
- C – Command series
- V – Vertical PTO shaft
- 850 – Numerical designation
General information
| Engine Specifications | |
| Model | Command PRO EFI Propane PCV850 |
| Type | 4-stroke, OHV, V-twin |
| Displacement | 824 cm 3 (50.3 cu-in) |
| Max. horsepower | 27.3 PS (20.1 KW; 27.0 HP) at 3,600 rpm |
| Max. torque | 61.2 Nm (6.2 kg·m; 45.2 ft·lb) at 2,400 rpm |
| Fuel system | EFI (Electronic Fuel Injection) |
| Cooling system | Forced-air |
| Ignition system | Electronic ignition system |
| Lubricating system | Pressurized lubrication |
| Starting system | Electric starter |
| Fuel used | Propane |
| 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 | |
| Bore x Stroke | 86.0 mm X 71.0 mm (3.40 x 2.80 in) | |
| Sleeve internal diameter | 86.000-86.025 mm (3.3858-3.3868 in) | |
| Number of piston rings (compression / oil): | 2 / 1 | |
| Thrust face outer diameter | 85.956-85.974 mm (3.3841-3.3848 in) | |
| Piston pin outer diameter | 21.996-22.000 mm (0.8660-0.8661 in) | |
| Ring-to-groove side clearance: | Top | 0.040-0.080 mm (0.0016-0.0031 in) |
| Second | 0.030-0.070 mm (0.0012-0.0028 in) | |
| 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) |
| Second | 0.650-0.800 mm (0.0256-0.0315 in) | |
| 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 drive | |
| Valves: | 4 (2 per cylinder) | |
| Valve head diameter: | INTAKE | 38.600-38.805 mm (1.5197-1.5295 in) |
| EXHAUST | 29.375-29.625 mm (1.1565-1.1663 in) | |
| Stem outer diameter: | INTAKE | 6.982-7.000 mm (0.2749-0.2756 in) |
| EXHAUST | 6.970-6.988 mm (0.2744-0.2751 in) | |
Tightening torque specs
| Tightening torque specs | |
| 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) |
| Spark plug | 27 Nm (2.75 kg·m; 20.0 lb·ft) |
Service Information
| Oil system | |
| 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 | |
| Spark plug | Champion RA8HC |
| Spark plug gap | 0.76 mm (0.030 in) |
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