Engine
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| Engine options | |
| Engine | 18HP Onan 709cc 2-cyl gasoline 18HP Onan 781cc 2-cyl gasoline |
| Engine Detail | |
| Engine | Onan B43G |
| Fuel | gasoline |
| Cylinders / valves | 2-cylinder 4-valve |
| Cooling / layout | air-cooled horizontal-shaft opposed twin |
| Engine application | The Onan B43G was used from 1983 through 1986, ending with tractor serial number M00318X420000. |
| Displacement | 709 cc 43.3 ci |
| Bore/Stroke | 3.25x2.62 inches 83 x 67 mm |
| Power (gross) | 18 hp 13.4 kW |
| Air cleaner | foam and paper |
| Compression | 6.5:1 |
| Idle RPM | 1350-3450 |
| Starter volts | 12 |
| Sparkplug | JD AM38622
NGK BPR5EFS
Motorcraft AGRF32
|
| Sparkplug gap | 0.025 inches 0.635 mm |
| Engine Oil | |
| Oil capacity | 1.75 qts 1.7 L |
| Engine Detail | |
| Engine | Onan P218 |
| Fuel | gasoline |
| Cylinders | 2-cylinder |
| Cooling / layout | air-cooled horizontal-shaft opposed twin |
| Engine application | The Onan P218 was used in the John Deere 318 from 1987, beginning at serial number M00318X420001, through the end of production. |
| Displacement | 781 cc 47.7 ci |
| Bore/Stroke | 3.25x2.88 inches 83 x 73 mm |
| Power (gross) | 18 hp 13.4 kW |
| Compression | 7:1 |
| Idle RPM | 1350-3450 |
| Torque | 31 lb-ft 42.0 Nm |
| Torque RPM | 2200 |
| Starter volts | 12 |
| Sparkplug | NGK BPR5EFS
Champion RS14YC
|
| Sparkplug gap | 0.025 inches 0.635 mm |
| Engine Oil | |
| Oil capacity | 1.75 qts 1.7 L |
Values may vary by engine, transmission or configuration. View source page