The Kohler SV730 is a 725 cc, (44.2 cu·in) V-twin air-cooled four-stroke internal combustion gasoline engine from the Courage series, manufactured by Kohler Co.
The Kohler SV730 engine has an OHV (overhead valve) design, vertical PTO-shaft, and 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).
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 25.3 PS (18.6 KW; 25.0 HP) at 3,600 rpm of horsepower and 60.7 Nm (6.2 kg·m; 44.8 ft·lb) at 2,200 rpm of torque.
The breakdown of the engine code is as follows:
- S – Courage series
- V – Vertical PTO shaft
- 730 – Numerical designation
General information
| Engine Specifications | |
| Model | Courage SV730 |
| Type | 4-stroke, OHV, V-twin |
| Displacement | 725 cm 3 (44.2 cu-in) |
| Max. horsepower | 25.3 PS (18.6 KW; 25.0 HP) at 3,600 rpm |
| Max. torque | 60.7 Nm (6.2 kg·m; 44.8 ft·lb) at 2,200 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 |
| Spark plug gap | 0.76 mm (0.030 in) |
Author:
so far i have 240 hours on mine made in 2009, i did learn the engine was made in China and no gasket was used in the bottom half of the engine, they used silicone which works ok if you dont use synthetic oil. synthetic oil will dissolve cheap grades of silicone sealant. i run high grade non alcohol fuel. i re adjusted the mixture a little rich to keep the exhaust from turning cherry red and preventing valve damage