John Deere GP Engine


John Deere GP tractor photo
1928 - 1935
Two-Cylinder Letter Series
Row-Crop tractor
Series map:
GP
22.2hp
Engines overview
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.
Displacement311.6 ci
5.1 L
Bore/Stroke5.75x6.00 inches
146 x 152 mm
Rated RPM900
Coolant capacity36 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.
Displacement339.3 ci
5.6 L
Bore/Stroke6.00x6.00 inches
152 x 152 mm
Rated RPM950
Coolant capacity36 qts
34.1 L
Page information
Contact: Peter Easterlund
Updated on June 13, 2017
Copyright 2022 TractorData LLC
©2000-2022 - TractorData.com®. Notice: Every attempt is made to ensure the data listed is accurate. However, differences between sources, incomplete listings, errors, and data entry mistakes do occur. Consult official literature from the manufacturer before attempting any service or repair.