John Deere AOS Engine


John Deere AOS tractor photo
1935 - 1949
Standard-tread tractor
Engine Detail
John Deere
all fuel
2-cylinder
liquid-cooled horizontal twin
Displacement309 ci
5.1 L
Bore/Stroke5.50x6.50 inches
140 x 165 mm
Cooling systemthermo-siphon
Air cleaneroil bath
Compression3.96:1
Rated RPM975
Firing order1-2
Oil capacity9.25 qts
8.8 L
Coolant capacity32 qts
30.3 L
Sparkplug gap0.030 inches
0.762 mm
Page information
Peter Easterlund - owner of TractorData.com
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Peter Easterlund - owner/author
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Updated on August 9, 2021
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