Blue Smoke from Lawn Mower
If blue smoke is coming from your lawn mower, it typically means that your machine is burning excess oil. Simply wait 10-15 minutes until the blue smoke dissipates as the extra oil burns off.
What Does Blue Smoke from Lawn Mower Mean?
If blue smoke comes from your lawn mower, the engine likely burns too much oil. This can happen if piston rings are worn or if you overfilled the oil. The smoke should go away in 10-15 minutes as the extra oil burns off.
Fixing Blue Smoke on Lawn Mower
- Check if the oil level is too high or too low per the manual. Both can cause smoking. Add or drain oil as needed.
- An oil leak can send oil onto hot engine parts, causing burning and smoke. Check for leaks and repair as needed.
- With enough wear, oil can leak past seals and piston rings into the combustion chamber. This requires repairing or replacing engine parts.
- Oil contamination in the fuel system can cause smoke. Drain old gas and add fresh fuel.
- Overfilling the oil sump can cause smoke. Check the dipstick and drain any excess.
- Worn engine components allowing oil to burn in the combustion chamber. Engine repair or replacement may be needed.
To stop a smoking mower:
- Check and replace dirty air filters
- Ensure proper oil level
- Drain and replace old gas
- Repair oil leaks
- Rebuild or replace a worn engine
The root causes of blue smoke are oil getting where it should not or engine wear. Properly maintaining oil levels, filters, fuel quality, and engine condition can prevent issues.