Kohler SV590

Kohler SV590The Kohler SV590 is a 597 cc, (36.4 cu·in) single-cylinder air-cooled four-stroke internal combustion gasoline engine from the Courage series, manufactured by Kohler Co.

The Kohler SV590 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 an electronic ignition system.

The cylinder bore is 94.0 mm (3.7 in) and the piston stroke is 86.0 mm (3.39 in). The compression ratio rating is 8.5:1. The SV590 engine produced 19.3 PS (14.2 kW; 19.0 HP) at 3,600 rpm of horsepower and 44.7 N·m (4.6 kg·m, 32.9 ft·lb) of torque.

The breakdown of the engine code is as follows:

  • S – Courage series
  • V – Vertical PTO shaft
  • 590 – Numerical designation

General information

Engine Specifications
Model Courage SV590
Type 4-stroke, OHV, single-cylinder
Displacement 597 cm 3 (36.4 cu-in)
Max. horsepower 19.3 PS (14.2 kW; 19.0 HP) at 3,600 rpm
Max. torque 44.7 N·m (4.6 kg·m, 32.9 ft·lb)
Fuel system Carburetor with a fixed main jet
Cooling system Forced-air
Ignition system Electronic ignition system
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: 8.5:1
Bore x Stroke 94.0 X 86.0 mm (3.70 x 3.39 in)
Sleeve internal diameter 94.010-94.035 mm (3.7012-3.7022 in)
Number of piston rings (compression / oil): 2 / 1
Piston pin outer diameter 21.995-22.000 mm (0.8659-0.8661 in)
Main journal diameter Flywheel End Before S/N 3703200003: 44.913-44.935 mm (1.7682-1.7691 in)
After S/N 3703200013: 44.870-44.895 mm (1.7665-1.7675 in)
PTO End Before S/N 3703200003: 41.913-41.935 mm (1.6501-1.6510 in)
After S/N 3703200013: 41.855-41.880 mm (1.6478-1.6488 in)
Cylinder Head
Valve Arrangement: OHV
Valves: 2 (2 per cylinder)
Valve head diameter: INTAKE 37.375-37.625 mm (1.4715-1.4813 in)
EXHAUST 32.125-32.375 mm (1.2648-1.2746 in)
Stem outer diameter: INTAKE 5.982-6.000 mm (0.2355-0.2362 in)
EXHAUST 5.970-5.988 mm (0.235-0.2357 in)

Tightening torque specs

Tightening torque specs
Cylinder head bolt Step 1: 20.5 Nm (2.1 kg·m; 15.1 ft·lb)
Step 2: 41.0 Nm (4.2 kg·m; 30.3 ft·lb)
Flywheel M12: 88.0 Nm (9.0 kg·m; 65.0 ft·lb)
M10: 66.5 Nm (6.7 kg·m; 48.7 ft·lb)
Spark plug 27 Nm (2.75 kg·m; 20.0 ft·lb)

Service Information

Valve clearance
Intake valve clearance 0.127 mm (0.005 in)
Exhaust valve clearance 0.178 mm (0.007 in)
Oil system
Oil type API SJ or higher
Recommended oil SAE 10W-30
Oil capacity 1.5 L (1.59 US. qt, 1.32 Imp. qt.)
Ignition system
Spark plug Champion RC12YC
Spark plug gap 0.76 mm (0.030 in)
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We try to use verified sources and official documentation, however, differences between sources or errors in entering information may occur. We do not provide advice on technical issues related to the engines operation or repair. We do not recommend using provided information for engines repairing engines or spare parts ordering, use only official service manuals and spare-parts catalogs.

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