Kohler M16

Kohler M16The Kohler M16 is a 588 cc (35.9 cu·in) single-cylinder air-cooled four-stroke internal combustion gasoline engine from the Magnum-series, manufactured by Kohler Co.

The Kohler M16 engine has an L-head (side valve) design and a horizontal PTO shaft. This engine is equipped with the Kohler-build side-draft carburetor with an adjustable jet and an electronic magneto ignition system. The M16 engine used a high-density paper 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 16.2 PS (11.9 kW; 16.0 HP) at 3,600 rpm of horsepower.

The breakdown of the engine code is as follows:

  • M – M-series
  • 16 – 16.0 HP horsepower
  • Suffix (engine is available with the following options):
    S – Electric starter;
    T – Retractable starter;
    ST – Electric and retractable starter;
    G – Tapered crankshaft (Generator applications);
    P – Threaded crankshaft (Pump applications);
    R – Reduction gear unit;
    EP – Generator;

General information

Engine Specifications
Model M16
Type 4-stroke, L-head, single cylinder
Displacement 588 cm 3 (35.88 cu-in)
Max. horsepower 16.2 PS (11.9 kW; 16.0 HP) at 3,600 rpm
Max. torque (crank PTO)
Fuel system Side-draft carburetor
Cooling system Forced-air
Ignition system Electronic magneto ignition system
Lubricating system Splash type
Starting system Recoil or electric starter
Fuel used Unleaded gasoline (octane number 86 or higher)
Fuel tank capacity 5.5 L (1.45 US. gal. 1.21 Imp. gal.)

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 95.1357-95.1610 mm (3.7455-3.7465 in)
Piston skirt outer diameter 95.0595-95.0214 mm (3.7425-3.741 in)
Number of piston rings (compression / oil): 2 / 1
Ring end gap Top 0.254-0.508 mm (0.010-0.020 in)
Second 0.254-0.508 mm (0.010-0.020 in)
Connecting rod small end ID 22.2428-2.2505 mm (0.8757-0.0886 in)
Piston pin outer diameter 22.2300-22.2377 mm (0.8752-0.8755 in)
Cylinder Head
Valve Arrangement: L-head (sidevalve)
Valves: 2
Valve minimum lift – Zero lash: INTAKE 8.07 mm (0.318 in)
EXHAUST 8.07 mm (0.318 in)
Stem outer diameter (standard): INTAKE 7.887-7.899 mm (0.3105-0.3110 in)
EXHAUST 7.833-7.851 mm (0.3084-0.3091 in)

Tightening torque specs

Tightening torque specs
Cylinder head bolt 34-41 Nm; 3.5-4.2 kg·m; 25-30 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 0.20-0.25 mm (0.0079-0.0098 in)
Exhaust valve clearance 0.43-0.48 mm (0.0169-0.0189 in)
Oil system
Oil type API SF or SG
Recommended oil Summer: SAE 30W
Winter: SAE 5W-20, 5W-30
Oil capacity 1.9 L (2.0 US. qt, 1.67 Imp. qt.)
Ignition system
Spark plug Champion: RH10
Spark plug gap 0.65 mm (0.0256 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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