John Deere B Engine


John Deere B tractor photo
1935 - 1952
Model year
Two-Cylinder Letter Series
Row-Crop tractor
Series map:
B
A
31.1hp*
42.2hp*
*Estimated engine power for comparison only.
Engine options
John Deere 3.1L 2-cyl gasoline
John Deere 3.1L 2-cyl all fuel
Engine Detail
John Deere
gasoline
2-cylinder
liquid-cooled
Optional gasoline-only engine. Featured higher compression than the all-fuel engine. Produced about 28 HP.
Displacement190.4 ci
3.1 L
Bore/Stroke4.6875x5.50 inches
119 x 140 mm
Fuel systemMarvel-Schebler DLTX-67
Cooling systemthermo-siphon
Air cleaneroil bath
Compression5.87:1
Rated RPM1250
Firing order1-2
Starterelectric
Starter volts6
Coolant capacity36 qts
34.1 L
Sparkplug gap0.030 inches
0.762 mm
Point gap0.015 inches
0.381 mm
Intake valve clearance0.020 inches*Hot
0.508 mm
Exhaust valve clearance0.020 inches*Hot
0.508 mm
Engine Oil
B gasoline engine oil chart
Oil capacity7 qts
6.6 L
Engine Detail
John Deere
all fuel
2-cylinder
liquid-cooled
Displacement190.4 ci
3.1 L
Bore/Stroke4.6875x5.50 inches
119 x 140 mm
Fuel systemMarvel-Schebler DLTX-73
Cooling systemthermo-siphon
Air cleaneroil bath
Compression4.71:1
Rated RPM1250
Firing order1-2
Starterelectric
Starter volts6
Coolant capacity36 qts
34.1 L
Sparkplug gap0.030 inches
0.762 mm
Point gap0.015 inches
0.381 mm
Intake valve clearance0.020 inches*Hot
0.508 mm
Exhaust valve clearance0.020 inches*Hot
0.508 mm
Engine Oil
B all fuel engine oil chart
Oil capacity7 qts
6.6 L
Page information
Peter Easterlund - owner of TractorData.com
Copyright 2023 TractorData.com®
TractorData is a family-owned small business located in Minnesota that has been providing reference information on tractors since 1999.
Peter Easterlund - owner/author
Email: Peter@TractorData.com
Updated on July 20, 2023
©2000-2023 - 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.