Kohler K341

Kohler K341The Kohler K341 is a 588 cc, (35.9 cu·in) natural aspirated single-cylinder four-stroke air-cooled internal combustion small gasoline engine with a horizontal shaft, manufactured by Kohler, for general-purpose applications.

Cylinder bore and piston stroke are 95.3 mm (3.75 in) and 82.6 mm (3.25 in), respectively. The Kohler K341 engine produced 16.2 PS (11.9 kW; 16.0 HP) at 3,600 rpm of maximum output power.

The Kohler K341 features:

  • L-head (side valve) design
  • Magneto ignition system, battery ignition system, breakerless ignition system ignition system*
  • Carburetor (Kohler or Walbro – fixed main jet or adjustable main jet)*
  • Centrifugal governor
  • Splash type lubrication system
  • Forced air cooling system
  • Retractable or electric starter

* – depending on the engine version

General information

Engine Specifications
Engine model K341
Engine type 4-stroke, L-head (side valve), single-cylinder
Displacement 588 cm3, (35.88 cu·in)
Max. horsepower 16.2 PS (11.9 kW; 16.0 HP) at 3,600 rpm
Max. torque
Cooling system Forced air
Air cleaner Paper air cleaner (oiled foam pre-cleaner was available as an option)
Lubricating system Splash type
Ignition system Magneto ignition system, battery ignition system, breakerless ignition system
Fuel system Carburetor (Kohler or Walbro – fixed main jet or adjustable main jet)
Fuel consumption
Fuel tank capacity
Fuel used Unleaded gasoline (octane number 86 or higher)
Starting system Retractable or electric starter
Governor Centrifugal governor
Dimensions (L x W X H)
Dry weight 55.4 kg (122.1 lbs)

Cylinder Block and Head

Cylinder block
Compression ratio:
Cylinder bore: 95.3 mm (3.75 in)
Piston stroke: 82.6 mm (3.25 in)
Cylinder internal diameter (standard): 95.2627-95.2373 mm (3.7505-3.7495 in)
Piston skirt outer diameter (standard): 95.0595-95.0214 mm (3.7425-3.741 in)
Number of piston rings (compression / oil): 2/1
Connecting rod small end diameter (standard): 22.2428-22.2504 mm (0.8757-0.876 in)
Piston pin diameter: 22.2300-22.2352 mm (0.8752-0.8754 in)
Ring end gap (Top): 0.177-0.432 mm (0.007-0.017 in)
Ring end gap (Second): 0.177-0.432 mm (0.007-0.017 in)
Crankshaft center distance: 41.3 mm (1.625 in)
Cylinder head
Valve arrangement: L-head (side valve)
Valves: 2
Valve head diameter (INTAKE): 34.798-35.052 mm (1.37-1.38 in)
Valve head diameter (EXHAUST): 34.798-35.052 mm (1.37-1.38 in)
Valve steam diameter (INTAKE): 7.8867-7.8994 mm (0.3105-0.311 in)
Valve steam diameter (EXHAUST): 7.8334-7.8511 mm (0.3084-0.3091 in)

Service Data

Engine
Maximum 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
Lubrication system: Splash type
Oil type: SF or SG
Recommended oil: Summer: SAE 30W
Winter: SAE 5W-20, 5W-30
Oil capacity: K341: 1.9 L (2.01 US. qt, 1.67 Imp. qt.)
K321A: 1.2 L (1.27 US. qt, 1.06 Imp. qt.)
Fuel system
Type: Carburetor (Kohler or Walbro – fixed main jet or adjustable main jet)
Ignition system
Type: Magneto ignition system, battery ignition system, breakerless ignition system
Spark plug: Champion RH10
Spark plug gap: 0.65 mm (0.0256 in)
Spark plug torque: 27 N·m (2.8 kg·m, 19.9 ft·lb)