5 Steps to Fix a Smoky Chainsaw

Check the fuel mixture first Most chainsaws run at a 50:1 ratio, but verify your manual. Dump old gas and mix a fresh batch using precise measurements.

Inspect the muffler spark arrestor screen Remove the muffler and look at the screen. If it is crusted with carbon, clean it with a wire brush or replace it.

Identify the smoke color White or blue smoke means burning oil. Dark black smoke means a rich fuel mix or restricted exhaust.

Look for bar oil leaks Bar oil dripping onto the muffler will cause smoke that looks like a combustion problem. Check the bar oil system separately.

Do not run a smoky saw for long Carbon will bake onto the piston and ruin the engine. Fix the issue immediately.