The Onan P224G is a 983 cc, (60.0 cu·in) natural aspirated two-cylinders four-stroke air-cooled internal combustion small gasoline engine with a horizontal shaft, manufactured by Onan for general-purpose applications.
The cylinder bore is 90.4 mm (3.56 in) and the piston stroke is 76.2 mm (3.00 in). The compression ratio rating is 7.0:1.
The Onan P224G engine produced 24.3 PS (17.9 kW; 24.0 HP) at 3,600 rpm of maximum output power.
The Onan P224G features:
- L-haed design
- Electronic battery ignition system
- Carburetor with fixed main jet
- Centrifugal governor
- Full pressure with oil filter lubrication system
- Forced air cooling system
- Electric starter 12V
General information
| Engine Specifications | |
| Engine model | P224G Performer 24 |
| Engine type | 4-stroke, L-head, two-cylinders |
| Displacement | 983 cm3, (60.0 cu·in) |
| Max. horsepower | 24.3 PS (17.9 kW; 24.0 HP) at 3,600 rpm |
| Cooling system | Forced air |
| Lubricating system | Full pressure with oil filter |
| Ignition system | Electronic battery |
| Fuel system | Carburetor with fixed main jet |
| Fuel used | Unleaded gasoline (octane number 86 or higher) |
| Starting system | Electric starter 12V |
| Stoping system | Ignition primary circuit ground |
| Governor | Centrifugal governor |
| Charging system | Flywheel alternator |
| PTO shaft rotation | Counterclockwise (from PTO shaft side) |
Cylinder Block and Head
| Cylinder block | |
| Compression ratio: | 7.0:1 |
| Cylinder bore: | 90.4 mm (3.56 in) |
| Piston stroke: | 76.2 mm (3.00 in) |
| Cylinder internal diameter (standard): | 90.510-90.490 mm (3.5634-3.5626 in) |
| Number of piston rings (compression / oil): | 2/1 |
| Connecting rod big end diameter (standard): | 44.460-44.480 mm (1.7504-1.7512 in) |
| Connecting rod small end diameter (standard): | 19.060-19.070 mm (0.7504-0.7508 in) |
| Piston pin diameter: | 19.060-19.070 mm (0.7504-0.7508 in) |
| Ring Groove Clearance (Top): | 0.076-0.203 mm (0.003-0.008 in) |
| Ring End Gap in Cylinder Clearance: | 0.254-0.508 mm (0.010-0.020 in) |
| Crankshaft Main Bearing Journal Diameter: | 50.800-50.780 mm (2.0000-1.9992 in) |
| Crankpin journal diameter: | 41.300-41.280 mm (1.6260-1.6252 in) |
| Crankshaft center distance: | 33.275 mm (1.31 in) |
| Cylinder head | |
| Valve arrangement: | L-head, gear driven |
| Valves: | 4,(2 valves in total) |
| Valve steam diameter (INTAKE): | 8.700-8.712 mm (0.3425-0.343 in) |
| Valve steam diameter (EXHAUST): | 8.661-8.687 mm (0.341-0.342 in) |
| Valve Clearance Stem-to-Guide (INTAKE): | 0.025-0.064 mm (0.0010-0.0025 in) |
| Valve Clearance Stem-to-Guide (EXHAUST): | 0.064-0.102 mm (0.0025-0.0040 in) |
| Valve spring free length (INTAKE): | 42.21 mm (1.6618 in) |
| Valve spring free length (EXHAUST): | 42.21 mm (1.6618 in) |
| Camshaft lobe height (INTAKE): | 29.640 mm (1.1669 in) |
| Camshaft lobe height (EXHAUST): | 29.390 mm (1.1571 in) |
Service Data
| Cylinder compression pressure: | 517-793 kPa; 75-115 PSI |
| Valve clearance | |
| Intake valve clearance (COLD): | 0.13 mm (0.0051 in) |
| Exhaust valve clearance (COLD): | 0.33 mm (0.0130 in) |
| Oil system | |
| Lubrication system: | Full pressure with oil filter |
| Oil type: | API SF, SF/CC, or SF/CD |
| Recommended oil: | SAE 5W-30, 10W-30, 30W, 40W |
| Oil capacity: |
Standard base (w/o oil filter): 1.4 L (1.5 US. qt, 1.2 Imp. qt.) High capacity base (w/o oil filter): 2.6 L (2.75 US. qt, 2.3 Imp. qt.) Oil filter: 0.3 L (0.32 US. qt, 0.26 Imp. qt.) |
| Fuel system | |
| Type: | Carburetor with fixed main jet |
| Pilot screw opening: | 1-1/2 turns out |
| Fuel pump type: | Pulse |
| Ignition system | |
| Type: | Electronic battery ignition system |
| Ignition timing: | 20° B.T.D.C. |
| Spark plug: | NGK: BPR5EFS; Champion: RS14YC |
| Spark plug gap: | 0.64 mm (0.0252 in) |
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