Kohler K660

Kohler K660The Kohler K660 is a 1,101 cc (67.20 cu·in) twin-cylinder air-cooled four-stroke internal combustion gasoline engine from K-series, manufactured by Kohler Co.

The Kohler K660 engine has an aluminum cylinder head, cast-iron liners, and horizontal PTO-shaft. The engine used a carburetor fuel system, magneto ignition system and lubrication system with gear type oil pump.

The cylinder bore is 92.0 mm (3.62 in) and the piston stroke is 82.5 mm (3.25 in). This engine produced 27.2 PS (20 kW; 26.8 HP) at 3,600 rpm of horsepower and 58 Nm (5.92 kg·m; 42.8 ft·lb) at 3,000 rpm of peak torque.

The breakdown of the engine code is as follows:

  • K – K-series
  • 66 – Approximate daisplacement (cu·in)
  • Suffix (engine is available with the following options):
  • P – Direct mounted;
  • S – Electric starter and generator;
  • C – Clutch model;

General information

Engine Specifications
Type4-stroke, L-head, twin cylinders
Displacement1,101 cm 3 (67.20 cu-in)
Max. horsepower27.2 PS (20 kW; 26.8 HP) at 3,600 rpm
Max. torque (crank PTO)58 Nm (5.92 kg·m; 42.8 ft·lb) at 3,000 rpm
Fuel systemDowndraft carburetor
Cooling systemForced-air
Ignition systemMagneto ignition system
Lubricating systemGear-type oil pump
Starting systemElectric starter
Fuel usedUnleaded gasoline (octane number 86 or higher)
Fuel tank capacity

Cylinder Block and Head

Cylinder block
Compression ratio:
Bore x Stroke92.0 X 82.5 mm (3.62 x 3.25 in)
Number of piston rings (compression / oil):2 / 1
Cylinder Head
Valve Arrangement:L-head (sidevalve)

Service Information

Max speed3,600 rpm
Oil system
Oil typeAPI SF or SG
Recommended oil Summer: SAE 30W
Winter: SAE 5W-20, 5W-30
Oil capacity3 1/2 qts.
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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