John Deere B Engine
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| 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. | |
| Displacement | 190.4 ci 3.1 L |
| Bore/Stroke | 4.6875x5.50 inches 119 x 140 mm |
| Fuel system | Marvel-Schebler DLTX-67 |
| Cooling system | thermo-siphon |
| Air cleaner | oil bath |
| Compression | 5.87:1 |
| Rated RPM | 1250 |
| Firing order | 1-2 |
| Starter | electric |
| Starter volts | 6 |
| Coolant capacity | 36 qts 34.1 L |
| Sparkplug gap | 0.030 inches 0.762 mm |
| Point gap | 0.015 inches 0.381 mm |
| Intake valve clearance | 0.020 inches*Hot 0.508 mm |
| Exhaust valve clearance | 0.020 inches*Hot 0.508 mm |
| Engine Oil | |
| |
| Oil capacity | 7 qts 6.6 L |
| Engine Detail | |
| John Deere | |
| all fuel | |
| 2-cylinder | |
| liquid-cooled | |
| Displacement | 190.4 ci 3.1 L |
| Bore/Stroke | 4.6875x5.50 inches 119 x 140 mm |
| Fuel system | Marvel-Schebler DLTX-73 |
| Cooling system | thermo-siphon |
| Air cleaner | oil bath |
| Compression | 4.71:1 |
| Rated RPM | 1250 |
| Firing order | 1-2 |
| Starter | electric |
| Starter volts | 6 |
| Coolant capacity | 36 qts 34.1 L |
| Sparkplug gap | 0.030 inches 0.762 mm |
| Point gap | 0.015 inches 0.381 mm |
| Intake valve clearance | 0.020 inches*Hot 0.508 mm |
| Exhaust valve clearance | 0.020 inches*Hot 0.508 mm |
| Engine Oil | |
| |
| Oil capacity | 7 qts 6.6 L |
| Page information | |
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| Peter Easterlund - owner/author | |
| Email: Peter@TractorData.com | |
| Updated on June 23, 2025 |