The Kohler KS530 is a 541 cc (33.0 cu·in) natural aspirated single-cylinder four-stroke air-cooled small gasoline engine with a vertical shaft from the 5400 series, manufactured by Kohler Co for general-purpose applications.
The cylinder bore is 94.0 mm (3.70 in) and the piston stroke is 78.0 mm (3.10 in). The compression ratio rating is 8.8:1.
The Kohler KS530 engine produced 17.3 PS (12.7 KW; 17.0 HP) at 3,600 rpm of maximum output power and 40.7 Nm (4.15 kg·m; 30.04 ft·lb) at 2,600 rpm of peak torque.
The Kohler KS530 features:
- OHV design
- Electronic ignition system
- One-barrel carburetor
- Centrifugal governor
- Pressure lubrication with full-flow filter
- Forced air cooling system
- Electric starter
General information
Engine Specifications | |
Engine model | KS530 |
Engine type | 4-stroke, OHV, single-cylinder |
Displacement | 541 cm3, (33.0 cu·in) |
Max. horsepower | 17.3 PS (12.7 KW; 17.0 HP) at 3,600 rpm |
Max. torque | 40.7 Nm (4.15 kg·m; 30.04 ft·lb) at 2,600 rpm |
Cooling system | Forced air |
Air cleaner | Replaceable, paper element |
Lubricating system | Pressurized lubrication |
Ignition system | Electronic ignition system |
Fuel system | One-barrel carburetor |
Fuel used | Unleaded gasoline (octane number 86 or higher) |
Starting system | Electric starter |
Dimensions (L x W X H) | 457 x 394 x 360 mm (18 x 15.5 x 14.2 in) |
Dry weight | 34.0 kg (75.0 lbs) |
Cylinder Block and Head
Cylinder block | |
Compression ratio: | 8.8:1 |
Cylinder bore: | 94.0 mm (3.70 in) |
Piston stroke: | 78.0 mm (3.10 in) |
Cylinder internal diameter (standard): | 94.010-94.035 mm (3.7012-3.7022 in) |
Piston skirt outer diameter (standard): | 93.975-93.989 mm (3.6998-3.7003 in) |
Number of piston rings (compression / oil): | 2/1 |
Piston pin diameter: | 21.995-22.000 mm (0.8659-0.8661 in) |
Ring-to-groove side clearance (Top): | 0.025-0.065 mm (0.0010-0.0026 in) |
Ring-to-groove side clearance (Second): | 0.040-0.080 mm (0.0016-0.0032 in) |
Ring-to-groove sing end gap (Oil): | 0.090-0.210 mm (0.0035-0.0083 in) |
Ring end gap (Second): | 0.150-0.400 mm (0.0059-0.0157 in) |
Ring end gap (Oil): | 1.000-1.250 mm (0.0394-0.0492 in) |
Crankshaft main journal diameter: | 40.913-40.935 mm (1.6107-1.6116 in) |
Crankpin journal diameter: | 40.982-41.000 mm (1.6135-1.6142 in) |
Cylinder head | |
Valve arrangement: | OHV |
Valves: | 2 |
Valve head diameter (INTAKE): | 35.875-36.125 mm (1.412-1.422 in) |
Valve head diameter (EXHAUST): | 32.875-33.125 mm (1.294-1.304 in) |
Seat angle (INTAKE): | 44.5° |
Seat angle (EXHAUST): | 44.5° |
Valve face angle (INTAKE): | 45° |
Valve face angle (EXHAUST): | 45° |
Valve steam diameter (INTAKE): | 5.982-6.000 mm (0.2355-0.2362 in) |
Valve steam diameter (EXHAUST): | 5.970-5.988 mm (0.2350-0.2357 in) |
Minimal valve lift (INTAKE): | 9.4 mm (0.370 in) |
Minimal valve lift (EXHAUST): | 9.4 mm (0.370 in) |
Tightening torque specifications
Valve clearance | |
Cylinder Head | Step 1: 24.4 Nm (2.5 kgf·m; 18.0 ft·lb) Step 2: 42.7 Nm (4.4 kgf·m; 31.5 ft·lb) |
Rocker Arm Pivot Stud | 13.5 Nm (1.4 kgf·m; 10 ft-lb) |
Rocker Arm Adjustment Nut Set Screw | 5.5 Nm (0.6 kgf·m; 4.2 ft-lb) |
Flywheel Retaining Screw | 115.0 (11.7 kgf·m; 84.9 ft·lb) |
Connecting Rod Cap | Step 1: 5.5 Nm (0.6 kgf·m; 4.1 ft·lb) Step 2: 11.8 Nm (1.2 kgf·m; 8.7 ft·lb) |
Cam Levers | 12.5 Nm (1.3 kgf·m; 9.2 ft·lb) |
Oil Drain Plug | 14.0 Nm (1.4 kgf·m; 10.4 ft-lb) |
Ignition Module | Into new hole: 8.8 Nm (0.9 kgf·m; 6.5 ft-lb) Into used hole: 3.4 Nm (0.3 kgf·m; 2.5 ft-lb) |
Muffler Retaining Nuts | 27.8 Nm (2.8 kgf·m; 20.5 ft-lb) |
Service Data
Valve clearance | |
Intake valve lash: | 0.101-0.152 mm (0.004-.006 in) |
Exhaust valve lash: | 0.101-0.152 mm (0.004-.006 in) |
Oil system | |
Lubrication system: | Pressurized lubrication |
Oil type: | SJ or higher |
Recommended oil: | KOHLER PRO 10W-50 or SAE 10W-30 |
Oil capacity: | 1.4 liters (1.5 US.qts, 1.23 Imp. qts) |
Fuel system | |
Type: | One-barrel carburetor |
Ignition system | |
Type: | Electronic ignition system |
Spark plug: | Champion RC12YC |
Spark plug gap: | 0.76 mm (0.0299 in) |
Spark plug torque: | 27 N·m (2.8 kg·m, 19.9 ft·lb) |
Module air gap: | 0.203-0.305 mm (0.008-0.012 in) |
References
1. Kohler 5400 series KS530-KS595 service manual. Kohler Co. 2020.
We try to use official documentation and verify the published data, but errors may occur. In addition, specifications of machinery and equipment may vary depending on markets and modifications. We do not recommend the use of this data for spare parts or repairs. Use official service manuals or parts catalogs for your product.
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