John Deere 318 Engine
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| Engine options | |
| 18HP Onan 709cc 2-cyl gasoline | |
| 18HP Onan 781cc 2-cyl gasoline |
| Engine Detail | |
| Onan B43G | |
| gasoline | |
| 2-cylinder 4-valve | |
| air-cooled horizontal-shaft opposed twin | |
| 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 | |
| Onan P218 | |
| gasoline | |
| 2-cylinder | |
| air-cooled horizontal-shaft opposed twin | |
| 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 |
| John Deere 318 Engine | |
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| Page information | |
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| Peter Easterlund - owner/author | |
| Email: Peter@TractorData.com | |
| Updated on February 23, 2024 |