The Kohler SV840 is a 725 cc, (44.2 cu·in) V-twin air-cooled four-stroke internal combustion gasoline engine from the Courage PRO series, manufactured by Kohler Co. This engine was designed for heavy-duty commercial use.
The Kohler SV840 engine has an OHV (overhead valve) design, vertical PTO-shaft, heat-treated bearings, and a pressurized lubrication system. This engine is equipped with a carburetor with a fixed main jet and one of three ignition systems: Fixed Ignition System, Digital Spark Advance Ignition (DSAI), Digital Spark Advance Module (DSAM). This engine is equipped with large-capacity professional filters: 60% larger air and oil filters and 70% larger fuel filter than the Courage-series.
The cylinder bore is 83.0 mm (3.27 in) and the piston stroke is 67.0 mm (2.64 in). The compression ratio rating is 9.0:1. This engine produced 27.3 PS (20.1 KW; 27.0 HP) at 3,600 rpm of horsepower and 61.5 Nm (6.3 kg·m; 45.4 ft·lb) at 2,400 rpm of torque.
The breakdown of the engine code is as follows:
- S – Courage series
- V – Vertical PTO shaft
- 840 – Numerical designation
General information
| Engine Specifications | |
| Model | Courage PRO SV840 |
| Type | 4-stroke, OHV, V-twin |
| Displacement | 725 cm 3 (44.2 cu-in) |
| Max. horsepower | 27.3 PS (20.1 KW; 27.0 HP) at 3,600 rpmm |
| Max. torque | 61.5 Nm (6.3 kg·m; 45.4 ft·lb) at 2,400 rpm |
| Fuel system | Carburetor with a fixed main jet |
| Cooling system | Forced-air |
| Ignition system |
Fixed Ignition System, Digital Spark Advance Ignition (DSAI), Digital Spark Advance Module (DSAM) |
| Lubricating system | Pressurized lubrication |
| Starting system | Electric starter |
| Fuel used | Unleaded gasoline (octane number 86 or higher) |
| Fuel tank capacity | – |
Cylinder Block and Head
| Cylinder block | ||
| Compression ratio: | 9.0:1 | |
| Bore x Stroke | 83.0 X 67.0 mm (3.27 x 2.64 in) | |
| Sleeve internal diameter | 83.006-83.031 mm (3.2679-3.2689 in) | |
| Number of piston rings (compression / oil): | 2 / 1 | |
| Connecting rod small end ID | 17.015-17.023 mm (0.6699-0.6702 in) | |
| Piston pin outer diameter | 16.995-17.000 mm (0.6691-0.6693 in) | |
| Cylinder Head | ||
| Valve Arrangement: | OHV | |
| Valves: | 4 (2 per cylinder) | |
| 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 bolt |
Step 1: 22.6 Nm (2.3 kg·m; 16.7 ft·lb) Step 2: 41.8 Nm (4.3 kg·m; 30.8 ft·lb) |
| Flywheel | 74.5 Nm (7.6 kg·m; 55.0 ft·lb) |
| Spark plug | 27 Nm (2.75 kg·m; 20.0 ft·lb) |
Service Information
| Valve clearance | |
| Intake valve clearance | 0.101-0.152 mm (0.004-0.006 in) |
| Exhaust valve clearance | 0.101-0.152 mm (0.004-0.006 in) |
| Oil system | |
| Oil type | API SJ or higher |
| Recommended oil | SAE 10W-30 |
| Oil capacity | 1.6-1.8 L (1.7-1.9 US. qt, 1.4-1.6 Imp. qt.) |
| Ignition system | |
| Spark plug | Champion RC12YC or DENSO K16PR-U |
| Spark plug gap | 0.76 mm (0.030 in) |
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