The Kohler K321 is a 512 cc (31.24 cu·in) single-cylinder air-cooled four-stroke internal combustion gasoline engine from K-series, manufactured by Kohler Co.
The Kohler K321 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 K321 engine used paper air cleaner (oiled foam pre-cleaner was available as an option).
The cylinder bore is 88.9 mm (3.5 in) and the piston stroke is 82.6 mm (3.25 in). This engine produced 14.1 PS (10.4 kW; 14.0 HP) at 3,600 rpm of horsepower.
The breakdown of the engine code is as follows:
- K – K-series
- 32 – 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 | K321 |
| Type | 4-stroke, L-head, single cylinder |
| Displacement | 512 cm 3 (31.24 cu-in) |
| Max. horsepower | 14.1 PS (10.4 kW; 14.0 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 | 88.9 X 82.6 mm (3.5 x 3.25 in) | |
| Sleeve internal diameter | 88.9127-88.8873 mm (3.5005-3.4995 in) | |
| Piston skirt outer diameter | 88.7501-88.7425 mm (3.4941-3.4938 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 | 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 | |
| Valve head diameter: | INTAKE | 34.798-35.052 mm (1.370-1.380 in) |
| EXHAUST |
28.448-28.702 mm (1.120-1.130 in) Suffix “D” and later: 34.798-35.052 mm (1.370-1.380 in) |
|
| Stem outer diameter (standard): | INTAKE | 7.887-7.899 mm (0.3105-0.3110 in) |
| EXHAUST | 7.833-7.851 mm (0.3084-0.3091 in) | |
Tightening torque specs
| Tightening torque specs | |
| Cylinder head bolt | 34-41 Nm; 3.5-4.2 kg·m; 25-30 ft·lb |
| Flywheel |
Nut: 68-81 Nm; 6.98.2 kg·m; 50-60 ft·lb Screw: 30-35 Nm; 3.0-3.5 kg·m; 22-27 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 | 0.20-0.25 mm (0.0079-0.0098 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 |
K321: 1.9 L (2.01 US. qt, 1.67 Imp. qt.) K321A: 1.2 L (1.27 US. qt, 1.06 Imp. qt.) |
| Ignition system | |
| Spark plug | Champion: RH10 |
| Spark plug gap | 0.65 mm (0.0256 in) |
What is the torque for a John deere tractors k321
k321 torque is 20.5 ft lbs at 3600
what is the tighting pattern for a k32114 hp kololer engine an thr proper nut & washer arangement
http://img.photobucket.com/albums/v78/JRD77VET/house/cub%20cadet/Cub%20Cadet%20125%20rebuild/IH_Kohler_Serv_Man_1-05_head_torque.jpg
Is this perhaps what you’re looking for?
Any idea at what the part number would be for the governor shaft bushing would be?
im looking to purchase a 1991 K321 Wheel Horse mower. Dont need the mower as I would remove the mower deck but will install the snow blade for pushing snow and dirt.
Is this a good machine and motor to purchase.
Yes my old John Deere has k 321 engine, I have about every attachments, tiller, snow thrower, mower deck, blade wheel weights and tire chains. The engine is very powerful compared to a new mobile.
Does the 14 hp K321 crank turn clock wise or counter clock ?
The K321 in my 1970 Cub Cadet 147 does not have a fuel pump, as it is gravity fed. However the K321 in a 1972 J.I. Case 644 FEL (Front End Loader) does have a cam driven mechanical fuel pump. Is there a more detailed description of the variations in these engines (if there are others) that have the same model ID (K321)?
Could you add a starter to a k321 off of a generator? After separating from generator to install into a cub cadet tractor?