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) |
Author:
Thank you for this information. I found it very useful
thanks for this information replasing piston found the silender bore very help full
I have been restoring a 1965 cub cadet tractor. Over the year of teardown and assemble I forgot how the throttle attaches to the carburetor. Will some kind soul send me a picture. Thanks in advance.