Kohler SV730

Kohler SV730The 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
ModelCourage SV730
Type4-stroke, OHV, V-twin
Displacement725 cm 3 (44.2 cu-in)
Max. horsepower25.3 PS (18.6 KW; 25.0 HP) at 3,600 rpm
Max. torque60.7 Nm (6.2 kg·m; 44.8 ft·lb) at 2,200 rpm
Fuel systemCarburetor with a fixed main jet
Cooling systemForced-air
Ignition system Fixed Ignition System,
Digital Spark Advance Ignition (DSAI),
Digital Spark Advance Module (DSAM)
Lubricating systemPressurized lubrication
Starting systemElectric starter
Fuel usedUnleaded gasoline (octane number 86 or higher)
Fuel tank capacity

Cylinder Block and Head

Cylinder block
Compression ratio:9.0:1
Bore x Stroke83.0 X 67.0 mm (3.27 x 2.64 in)
Sleeve internal diameter83.006-83.031 mm (3.2679-3.2689 in)
Number of piston rings (compression / oil):2 / 1
Connecting rod small end ID17.015-17.023 mm (0.6699-0.6702 in)
Piston pin outer diameter16.995-17.000 mm (0.6691-0.6693 in)
Cylinder Head
Valve Arrangement:OHV
Valves:4 (2 per cylinder)
Stem outer diameter:INTAKE6.982-7.000 mm (0.2749-0.2756 in)
EXHAUST6.970-6.988 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)
Flywheel74.5 Nm (7.6 kg·m; 55.0 ft·lb)
Spark plug27 Nm (2.75 kg·m; 20.0 ft·lb)

Service Information

Valve clearance
Intake valve clearance0.101-0.152 mm (0.004-0.006 in)
Exhaust valve clearance0.101-0.152 mm (0.004-0.006 in)
Oil system
Oil typeAPI SJ or higher
Recommended oilSAE 10W-30
Oil capacity1.6-1.8 L (1.7-1.9 US. qt, 1.4-1.6 Imp. qt.)
Ignition system
Spark plugChampion RC12YC
Spark plug gap0.76 mm (0.030 in)
Author: Sergei Wers
About: Co-founder and CEO of a multi-brand auto repair shop (engine repair, chassis repair, body repair and painting) for over 15 years. I have been developing internet sites with technical specifications for more than seven years.

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1 Comment

  1. 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

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