Kohler K141

The Kohler K141 is a 277 cc (16.9 cu·in) single-cylinder air-cooled four-stroke internal combustion gasoline engine from K-series, manufactured by Kohler Co.

The Kohler K141 engine has an L-head (side valve) design and horizontal PTO-shaft. This engine can be equipped with Kohler or Walbro carburetor and magneto, battery or breakerless ignition systems.

The cylinder bore is 74.62 mm (2.94 in) and the piston stroke is 63.50 mm (2.5 in). This engine produced 6.1 PS (4.5 kW; 6.0 HP) at 3,600 rpm of horsepower.

The breakdown of the engine code is as follows:

• K – K-series
• 14 – 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;
  EP – Electric plant;
  A – Special oil pan;
  C – Clutch model;
  G – Generator applications;
  P – Pump model;
  Q – Quled model;
  R – Reduction gear;

General information

Engine Specifications
Model	K141
Type	4-stroke, L-head, single cylinder
Displacement	277 cm 3 (16.9 cu-in)
Max. horsepower	6.1 PS (4.5 kW; 6.0 HP) at 3,600 rpm
Max. torque (crank PTO)	–
Fuel system	Carburetor (Kohler or Walbro, fixed main jet or adjustable main jet)
Cooling system	Forced-air
Ignition system	Magneto or battery or breakerless 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		74.62 X 63.50 mm (2.94 x 2.50 in)
Sleeve internal diameter		74.6252-74.5998 mm (2.938-2.937 in)
Piston skirt outer diameter		74.4143-74.3737 mm (2.9297-2.9281 in)
Number of piston rings (compression / oil):		2 / 1
Ring end gap	Top	0.177-0.432 mm (0.007-0.017 in)
	Second	0.177-0.432 mm (0.007-0.017 in)
Connecting rod small end ID		15.8877-15.8953 mm (0.6255-0.6258 in)
Piston pin outer diameter		15.8673-15.8724 mm (0.6247-0.6249 in)
Cylinder Head
Valve Arrangement:		L-head (sidevalve)
Valves:		2
Valve head diameter:	INTAKE	34.925 mm (1.375 in)
	EXHAUST	28.575 mm (1.125 in)
Stem outer diameter (standard):	INTAKE	7.886-7.899 mm (0.3105-0.311 in)
	EXHAUST	7.848-7.861 mm (0.309-0.3095 in)

Tightening torque specs

Tightening torque specs
Cylinder head bolt	20-27 Nm; 2.0-2.7 kg·m; 15-20 ft·lb
Flywheel	115-122 Nm; 11.7-12.3 kg·m; 85-90 ft·lb
Spark plug	25-30 Nm; 2.55-3.06 kg·m; 18-22 ft·lb

Service Information

–

Engine
Max speed	3,600 rpm
Valve clearance
Intake valve clearance	0.15-0.20 mm (0.0059-0.0079 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	1.2 L (1.27 US. qt, 1.06 Imp. qt.)
Ignition system
Spark plug	Champion: RJ8C
Spark plug gap	0.65 mm (0.0256 in)