The Tecumseh V50 is a 200 cc, (12.2 cu·in) natural aspirated single-cylinder four-stroke air-cooled internal combustion small gasoline engine, from the V-series (Vertical shaft), manufactured by Tecumseh for general-purpose applications.
It has an 66.67 mm (2.62 in) cylinder bore and 57.15 mm (2.25 in) piston stroke. Compression ratio rating is 5.67:1. The Tecumseh V50 engine produced 5.0 PS (3.7 KW; 5.0 HP) at 3,600 rpm of maximum output power.
The Tecumseh V50 features:
- Aluminum cylinder block
- L-head (sidevalve) design
- Magneto ignition system
- Float type carburetor
- Pressurized lubrication system
- Forced air cooling system
- Recoil or electric starter
General information
| Engine Specifications | |
| Engine model | V50 |
| Engine type | 4-stroke, L-head, single-cylinder |
| Displacement | 200 cm3, (12.18 cu·in) |
| Max. horsepower | 5.0 PS (3.7 KW; 5.0 HP) at 3,600 rpm |
| Max. torque | – |
| Cooling system | Forced air |
| Lubricating system | Pressurized |
| Ignition system | Magneto ignition |
| Fuel system | Float type 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: | 5.67:1 |
| Cylinder bore: | 66.67 mm (2.62 in) |
| Piston stroke: | 57.15 mm (2.25 in) |
| Cylinder internal diameter (standard): | 66.675-66.700 mm (2.6250-2.6260 in) |
| Piston skirt outer diameter (standard): | 66.573-66.586 mm (2.6210-2.6215 in) |
| Number of piston rings (compression / oil): | 2/1 |
| Piston pin diameter: | – |
| Side clearance ring groove (Top): | 0.051-0.102 mm (0.002-0.004 in) |
| Side clearance ring groove (Second): | 0.051-0.102 mm (0.002-0.004 in) |
| Side clearance ring groove (Oil): | 0.051-0.102 mm (0.002-0.004 in) |
| Ring end gap (Top): | 0.051-0.102 mm (0.002-0.004 in) |
| Ring end gap (Top): | 0.254-0.508 mm (0.01-0.02 in) |
| Crankpin journal diameter: | 26.962-26.975 mm (1.0615-1.0620 in) |
| Carnkshaft seat diameter for roller bearings: | 25.362-25.375 mm (0.9985-0.9990 in) |
| Cylinder head | |
| Valve arrangement: | L-head, gear driven |
| Valves: | 2 |
| Valve seat angle: | 46° |
| Valve seat width: | 1.067-1.321 mm (0.042-0.052 in) |
| Camshaft bearing: | 15.824-15.837 mm (0.6230-0.6235 in) |
Service Data
| Valve clearance | |
| Intake valve clearance: | 0.203 mm (0.008 in) |
| Exhaust valve clearance: | 0.305 mm (0.012 in) |
| Oil type: | API SF or SE |
| Recommended oil: | Summer 30 or 10W-30, Winter 5W-30, 10W |
| Oil capacity: | 0.81 liters (0.86 US.qts, 0.71 Imp. qts) |
| Fuel system | |
| Type: | Float type carburetor |
| Ignition system | |
| Type: | Magneto ignition |
| Spark plug: | Champion RJ8C |
| Spark plug gap: | 0.7-0.8 mm (0.0276-0.0315 in) |
Tightening torque
| Tightening torque specs | |
| Cylinder head bolts | 22.5 Nm (2.3 kgf·m; 16.6 ft·lb) |
| Connecting rod bolts | 24.0 Nm (2.4 kgf·m; 17.7 ft·lb) |
| Cylinder cover or flange | 13.0 Nm (1.3 kgf·m; 9.6 ft·lb) |
| Flywheel nut | 54.0 Nm (5.5 kgf·m; 39.9 ft·lb) |
| Spark plug | 28.5 Nm (2.9 kgf·m; 21 ft·lb) |
| Ignition mounting (to stud) | 5.0 Nm (0.5 kgf·m; 3.7 ft·lb) |
| Intake pipe to cylinder | 13.5 Nm (1.4 kgf·m; 10 ft·lb) |
| Carburetor to intake pipe | 8.0 Nm (0.8 kgf·m; 5.9 ft·lb) |
| Muffler mounting | 13.0 Nm (1.3 kgf·m; 9.6 ft·lb) |
| Muffler mounting flanged | 9.0 Nm (0.9 kgf·m; 6.6 ft·lb) |
| Magneto stator to cylinder | 7.5 Nm (0.8 kgf·m; 5.5 ft·lb) |
| Recoil starter (Top mount) | 5.5 Nm (0.6 kgf·m; 4.1 ft·lb) |
| Electric starter to cylinder | 7.5 Nm (0.8 kgf·m; 5.5 ft·lb) 11.0 Nm (1.1 kgf·m; 8.1 ft·lb) |
Applications
| Manufacturer or Brand | Models |
| Lawn tractors | |
| John Deere | 55 |
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