Kohler K361

Kohler K361The Kohler K361 is a 588 cc (35.89 cu·in) single-cylinder air-cooled four-stroke internal combustion gasoline engine from K-series, manufactured by Kohler Co.

The Kohler K361 engine has an OHV (overhead valves) design and horizontal PTO-shaft. This engine was equipped with side draft carburetor with adjustable jet and battery ignition systems. The K361 engine used dry type air cleaner.

The cylinder bore is 95.3 mm (3.75 in) and the piston stroke is 82.6 mm (3.25 in). This engine produced 18.2 PS (13.4 kW; 18.0 HP) at 3,600 rpm of horsepower.

The breakdown of the engine code is as follows:

  • K – K-series
  • 36 – Approximate daisplacement (cu·in)
  • 1 – Single cylinder
  • Suffix (engine is available with the following options):
    S – Electric starter;
    T – Retractable starter;
    ST – Electric and retractable starter;
    A – Special oil pan;
    C – Clutch model;
    P – Pump model;
    Q – Quled model;

General information

Engine Specifications
Model K361
Type 4-stroke, L-head, single cylinder
Displacement 588 cm 3 (35.88 cu-in)
Max. horsepower 18.2 PS (13.4 kW; 18.0 HP) at 3,600 rpm
Max. torque (crank PTO)
Fuel system Side-draft carburetor
Cooling system Forced-air
Ignition system Battery ignition system
Lubricating system Splash type
Starting system Recoil or electric starter
Fuel used Unleaded gasoline (octane number 86 or higher)
Fuel tank capacity

Cylinder Block and Head

Cylinder block
Compression ratio:
Bore x Stroke 95.3 X 82.6 mm (3.75 x 3.25 in)
Sleeve internal diameter 95.250 mm (3.75 in)
Piston skirt outer diameter 95.060 mm (3.7425 in)
Number of piston rings (compression / oil): 2 / 1
Cylinder Head
Valve Arrangement: OHV
Valves: 2

Tightening torque specs

Tightening torque specs
Cylinder head bolt 41-48 Nm; 4.2-4.9 kg·m; 30-35 ft·lb
Flywheel nut 81-95 Nm; 8.3-9.7 kg·m; 60-70 ft·lb
Spark plug 25-30 Nm; 2.55-3.06 kg·m; 18-22 ft·lb

Service Information

Max speed 3,600 rpm
Valve clearance
Intake valve clearance 0.13 mm (0.0051 in)
Exhaust valve clearance 0.13 mm (0.0051 in)
Oil system
Oil type API SF or SG
Recommended oil Summer: SAE 30W
Winter: SAE 5W-20, 5W-30
Oil capacity K321: 1.9 L (2.01 US. qt, 1.67 Imp. qt.)
K321A: 1.4 L (1.5 US. qt, 1.23 Imp. qt.)
Ignition system
Spark plug Champion: RH10
Spark plug gap 0.89 mm (0.035 in)
Ignition timing 20° B.T.D.C.
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