The Tecumseh OH160 is a 453 cc, (27.6 cu·in) natural aspirated single-cylinder four-stroke air-cooled internal combustion small gasoline engine with a horizontal shaft, manufactured by Tecumseh for general-purpose applications.
It has an 88.9 mm (3.5 in) cylinder bore and 69.8 mm (2.75 in) piston stroke. The Tecumseh OH160 engine produced 16.2 PS (11.9 kW; 16 HP) at 3,600 rpm of maximum output power.
The Tecumseh OH160 features:
- Cast-iron cylinder block
- OHV (overhead valve) design
- Solid-state ignition system
- Walbro carburetor
- Splash type lubrication system
- Forced air cooling system
- Recoil or electric starter
General information
| Engine Specifications | |
| Engine model | OH160 |
| Engine type | 4-stroke, OHV, single-cylinder |
| Displacement | 453 cm3, (27.64 cu·in) |
| Max. horsepower | 16.2 PS (11.9 kW; 16.0 HP) at 3,600 rpm |
| Max. torque | – |
| Cooling system | Forced air |
| Lubricating system | Splash |
| Ignition system | Solid-state |
| Fuel system | Walbro carburetor |
| Fuel used | Gasoline (octane number 86 or higher) |
| Starting system | Recoil or electric starter |
| PTO shaft rotation | Counterclockwise (from PTO shaft side) |
| Dimensions (L x W X H) | – |
| Dry weight | – |
Cylinder Block and Head
| Cylinder block | |
| Compression ratio: | – |
| Cylinder bore: | 88.9 mm (3.5 in) |
| Piston stroke: | 69.8 mm (2.75 in) |
| Cylinder internal diameter (standard): | 88.9000-88.9250 mm (3.5-3.501 in) |
| Piston skirt outer diameter (standard): | 88.7730-88.8240 mm (3.495-3.497 in) |
| Number of piston rings (compression / oil): | 2/1 |
| Piston pin diameter: | 17.4650-17.4750 mm (0.6876-0.688 in) |
| Side clearance ring groove (Top): | 0.038-0.089 mm (0.0015-0.0035 in) |
| Side clearance ring groove (Second): | 0.038-0.089 mm (0.0015-0.0035 in) |
| Ring end gap (Top): | 0.254-0.508 mm (0.01-0.02 in) |
| Ring end gap (Top): | 0.254-0.508 mm (0.01-0.02 in) |
| Crankpin journal diameter: | 34.925-34.938 mm (1.375-1.3755 in) |
| Carnkshaft seat diameter for roller bearings: | 30.137-30.150 mm (1.186-1.187 in) |
| Crankshaft center distance: | 34.9 mm (1.375 in) |
| Cylinder head | |
| Valve arrangement: | OHV, gear driven |
| Valves: | 2 |
| Valve seat angle: | 46° |
| Valve seat width: | 1.067-1.321 mm (0.0420-0.052 in) |
| Valve face angle: | 45° |
| Valve lip width: | 1.524 mm (0.060 in) |
| Valve face width: | 3.378 mm (0.1330 in) |
| Valve spring free length (INTAKE): | 50.292 mm (1.98 in) |
| Valve spring free length (EXHAUST): | 50.292 mm (1.98 in) |
Tightening torque
| Tightening torque specs | |
| Connecting rod screw or nut | 20.3-27.1 Nm (15.0-20.1 ft-lbs) |
| Mounting flange cylinder cover screw | 9.7-12.4 Nm (7.2-9.2 ft-lbs) |
| Cylinder cover flywheel end | 11.3-14.7 Nm (8.4-10.9 ft-lbs) |
| Flywheel nut | 13.6-18.1 Nm (10.1-13.4 ft-lbs) |
| PTO shaft to flywheel | 67.8-74.6 Nm (50.2-55.3 ft-lbs) |
| Spark plug | 11.3-14.1 Nm (8.4-10.4 ft-lbs) |
| Intake pipe to cylinder | 24.9-31.6 Nm (18.4-23.4 ft-lbs) |
| Carburetor to intake pipe | 8.1-10.9 Nm (6.0-8.1 ft-lbs) |
| Air cleaner elbow to carburetor | 5.4-8.1 Nm (4.0-6.0 ft-lbs) |
| Air cleaner bracket to elbow | 2.8-4.0 Nm (2.1-3.0 ft-lbs) |
| Air cleaner bracket to carburetor | 1.7-2.8 Nm (1.3-2.1 ft-lbs) |
| Tank bracket to cylinder (5/16′ lower) | 1.7-2.8 Nm (1.3-2.1 ft-lbs) |
| Tank bracket to cylinder (1/4′) | 17.0-22.6 Nm (12.6-16.7 ft-lbs) |
| Starter-recoil-top mount | 10.9-13.6 Nm (8.1-10.1 ft-lbs) |
| Starter-electric-straight drive | 4-5-6.8 Nm (3.0-4.1 ft-lbs) |
| Rope start pulley mounting screws | 15.8-19.2 Nm (11.7-14.2 ft-lbs) |
| Rocker arm box to cylinder head | 6.8-8.5 Nm (4.1-6.3 ft-lbs) |
| Rocker arm cover and breather (screw to stud) | 9.0-10.2 Nm (6.7-7.6 ft-lbs) |
| Rocker arm adjusting screw lock nut | 1.7-2.3 Nm (1.3-1.7 ft-lbs) |
| Magneto stator mounting screw | 2.3-3.4 Nm (1.7-2.5 ft-lbs) |
| Blower housing to baffle or cylinder | 8.1-10.9 Nm (6.0-8.1 ft-lbs) |
| Housing baffle to cylinder | 5.4-8.1 Nm (4.0-6.0 ft-lbs) |
| Blower housing extension to cylinder | 8.1-10.9 Nm (6.0-8.1 ft-lbs) |
| Governor rod clamp to rod (screw and nut) | 8.1-10.9 Nm (6.0-8.1 ft-lbs) |
| Governor rod clamp to lever (screw and nut) | 1.7-2.8 Nm (1.3-2.1 ft-lbs) |
| Ground wire to terminal | 1.7-2.3 Nm (1.3-1.7 ft-lbs) |
| Toggle stop switch nut | 0.6-1.1 Nm (0.4-0.8 ft-lbs) |
| Oil drain plug 3/8-18 | 1.1-1.7 Nm (0.8-1.3 ft-lbs) |
| Oil drain cap | 9.0-11.3 Nm (6.7-8.3 ft-lbs) |
Service Data
| Valve clearance | |
| Intake valve clearance: | 0.127 mm (0.005 in) |
| Exhaust valve clearance: | 0.2540 mm (0.010 in) |
| Oil type: | API SF or SE |
| Recommended oil: | Summer 30 or 10W-30, Winter 5W-30, 10W |
| Oil capacity: | 1.5 L (1.59 US. qt, 1.32 Imp. qt.) |
| Fuel system | |
| Type: | Walbro carburetor |
| Ignition system | |
| Type: | Solid-state |
| Spark plug: | Champion L-82C, L-85 |
| Spark plug gap: | 0.7-0.8 mm (0.0276-0.0315 in) |
| Ignition coil air gap | 0.152-0.254 mm (0.006-0.01 in) |
Author:
can you tell me what kind of fuel pump system does a oh160 engine use, Thank You.