| Engine options | |
| 12HP Kohler 476cc 1-cyl gasoline | |
| 14HP Kohler 512cc 1-cyl gasoline |
| Engine Detail | |
| Kohler K301AS | |
| gasoline | |
| 1-cylinder | |
| air-cooled horizontal-shaft | |
| The 12-horsepower K301 was used in the 1968 model year 140 tractors. | |
| Displacement | 476 cc 29.07 ci |
| Bore/Stroke | 3.375x3.25 inches 86 x 83 mm |
| Power (gross) | 12 hp 8.9 kW |
| Air cleaner | dry |
| Rated RPM | 3600 |
| Idle RPM | 1200-3800 |
| Starter | electric |
| Starter volts | 12 |
| Sparkplug gap | 0.025 inches 0.635 mm |
| Point gap | 0.020 inches 0.508 mm |
| Intake valve clearance | 0.010 inches (cold) 0.254 mm |
| Exhaust valve clearance | 0.020 inches (cold) 0.508 mm |
| Engine Oil | |
| |
| Oil capacity | 1.5 qts 1.4 L |
| Oil change | 25 h |
| Engine Detail | |
| Kohler K321AS | |
| gasoline | |
| 1-cylinder | |
| air-cooled horizontal-shaft | |
| The 14-horsepower K321 engine was first used in 1969 models, serial number 10,001. | |
| Displacement | 512 cc 31.27 ci |
| Bore/Stroke | 3.50x3.25 inches 89 x 83 mm |
| Power | 14 hp 10.4 kW |
| Air cleaner | dry |
| Rated RPM | 3600 |
| Idle RPM | 1500-3800 |
| Starter | electric |
| Starter volts | 12 |
| Sparkplug gap | 0.025 inches 0.635 mm |
| Point gap | 0.020 inches 0.508 mm |
| Intake valve clearance | 0.010 inches (cold) 0.254 mm |
| Exhaust valve clearance | 0.020 inches (cold) 0.508 mm |
| John Deere 140 Engine | |
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| Page information | |
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| 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 June 17, 2025 |