John Deere GP Engine
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| Engine options | |
| John Deere 5.1L 2-cyl kerosene | |
| John Deere 5.6L 2-cyl kerosene |
| Engine Detail | |
| John Deere | |
| kerosene | |
| 2-cylinder | |
| liquid-cooled | |
| Original engine, used until 1931. Water-injection system was used to prevent detonation ("knocking") with low quality fuels. | |
| Displacement | 311.6 ci 5.1 L |
| Bore/Stroke | 5.75x6.00 inches 146 x 152 mm |
| Rated RPM | 900 |
| Coolant capacity | 36 qts 34.1 L |
| Engine Detail | |
| John Deere | |
| kerosene | |
| 2-cylinder | |
| liquid-cooled | |
| The new engine was introuded in 1931 on GP serial number 224100. It had lower compression but with a quarter-inch larger bore, producing slightly more power with better fuel economy. The lower compression eliminated the pre-ignition problem when using low-quality fuel, so the water-injection system was eliminated. | |
| Displacement | 339.3 ci 5.6 L |
| Bore/Stroke | 6.00x6.00 inches 152 x 152 mm |
| Rated RPM | 950 |
| Coolant capacity | 36 qts 34.1 L |
| Page information | |
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| Peter Easterlund - owner/author | |
| Email: Peter@TractorData.com | |
| Updated on June 13, 2017 |