John Deere Starting Problems & Solutions (Quick Reference Chart) Causes Solutions Empty Fuel Tank: Fill with fresh. Don’t turn your back on this beautiful and powerful mower because of those issues. Lawn mower backfiring while running can be due to different reasons, such as the carburetor adjustment set too lean, gasoline containing higher blends of alcohol, or lowering engine speed too fast. When I turn off my mower, why does it backfire? Backfire, or more precisely “after fire,” occurs when an engine is stopped because the heat of the muffler ignites an unburned fuel/air mixture.
No Payments/No Interest until 1 April 2024 followed by 3. Below is a bit I wrote & saved cause I got fed up writing the same thing 50 times a week. John deere lawn mower backfires when turning off Your check valve may not be letting air into the fuel tank, which will form a vacuum seal as the gas drains.