Tecumseh HH160

Tecumseh HH160The Tecumseh HH160 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 HH160 engine produced 16.2 PS (11.9 kW; 16 HP) at 3,600 rpm of maximum output power.

The Tecumseh HH160 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 HH160
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)

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)

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)

Applications

Manufacturer or Brand Models
Lawn tractors
Wheel Horse C-160

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