The Kohler K662 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 K662 engine has an L-head (side valve) design, horizontal PTO-shaft, and pressurized lubrication system with a positive pressure oil pump. This engine is equipped with a downdraft carburetor and magneto ignition systems. The K662 engine used paper air cleaner (oiled foam pre-cleaner was available as an option) and full-flow type oil filter.
The cylinder bore is 92.0 mm (3.62 in) and the piston stroke is 82.5 mm (3.25 in). This engine produced 24.3 PS (17.9 kW; 24 HP) at 3,600 rpm of horsepower.
The breakdown of the engine code is as follows:
- K – K-series
- 66 – Approximate daisplacement (cu·in)
- 2 – Twin cylinders
- Suffix (engine is available with the following options):
S – Electric starter;
EP – Electric plant;
Q – Quled model;
General information
| Engine Specifications | |
| Model | K662 |
| Type | 4-stroke, L-head, twin-cylinders |
| Displacement | 1,101 cm 3 (67.20 cu-in) |
| Max. horsepower | 24.3 PS (17.9 kW; 24 HP) at 3,600 rpm |
| Max. torque (crank PTO) | – |
| Fuel system | Downdraft carburetor |
| Cooling system | Forced-air |
| Ignition system | Magneto ignition system |
| Lubricating system | Pressurized lubrication |
| Starting system | |
| Fuel used | Unleaded gasoline (octane number 86 or higher) |
| Fuel tank capacity | – |
Cylinder Block and Head
| Cylinder block | ||
| Compression ratio: | – | |
| Bore x Stroke | 92.0 X 82.5 mm (3.62 x 3.25 in) | |
| Sleeve internal diameter | 92.0877-92.0623 mm (3.6255-3.6245 in) | |
| Piston skirt outer diameter | 92.0496-92.0369 mm (3.624-3.6235 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 | 22.2428-22.2504 mm (0.8757-0.876 in) | |
| Piston pin outer diameter | 22.2300-22.2352 mm (0.8752-0.8754 in) | |
| Cylinder Head | ||
| Valve Arrangement: | L-head (sidevalve) | |
| Valves: | 2 | |
Tightening torque specs
| Tightening torque specs | |
| Cylinder head bolt | 54 Nm; 5.55 kg·m; 40 ft·lb |
| Flywheel | 176 Nm; 17.9 kg·m; 130 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 (0.006-0.008 in) |
| Exhaust valve clearance | 0.43-0.48 mm (0.017-0.019 in) |
| Oil system | |
| Oil type | API SF or SG |
| Recommended oil |
Summer: SAE 30W Winter: SAE 5W-20, 5W-30 |
| Oil capacity |
Without oil filter: 2.8 L (3.0 US. qt, 2.5 Imp. qt.) With oil filter: 3.75 L (4.0 US. qt, 3.3 Imp. qt.) |
| Ignition system | |
| Spark plug | Champion: RCJ-8 |
| Spark plug gap | 0.65 mm (0.0256 in) |
Author:
I just wanted to say …thankyou for posting this information on your site….it has helped me alot on the k662 motor that i have on a 500 bobcat
Hey Jerry,my name is Terry. I too have a bobcat 500 unrestored,but i love it. I call it frankenstein, because i brought it back to life a couple of years ago. What part of the world do you live in? Thought maybe we could keep in touch every now and then to pick each others brain about our bobcats.
Can this carburettor used on nissan NA20 engine 1999 model?
what is the point gap on the K662 mag motor ?