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Chainsaw Runs Poorly

The chainsaw small engine often has a separate model number. Use the small engine model number for a complete list of symptoms and parts. Watch our model # lookup video for help finding the model number.

The 4 most common part(s) or condition(s) which contribute to the symptom Chainsaw runs poorly are listed below. Check or test each item and watch any available videos. If you are still unable to solve the problem you may need to do additional research and troubleshooting. Remember, with our 365 Days. Period.® return policy you can return any part for any reason. So, go ahead and buy it to try it. No other parts retailer offers this unconditional return policy.


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For the symptom you selected, these are the most common parts or causes, ordered by the likelihood of fixing the symptom.

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Carburetor

If the chainsaw runs poorly, the carburetor might be clogged or have bad fuel in the float bowl. If old fuel was left in the chainsaw for a long time some of the volatile ingredients may have evaporated, leaving a thicker, stickier product that is more like varnish or shellac. This sticky fuel can clog up the small jets and ports in the carburetor and it can be difficult to burn making the engine run poorly. The only solution is to drain the old fuel from the float bowl and thoroughly clean the carburetor with carburetor cleaner. If that isn't effective, replace the entire carburetor.

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Air Filter

If the air filter is clogged, the chainsaw runs poorly. Check and then clean or replace the air filter according to the manufacturers instructions for the chainsaw. The air filter keeps sawdust and dirt out of the engine. Once it is clogged the engine doesn't get enough air which makes it run poorly.

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Fuel Filter

If the chainsaw runs poorly the fuel filter might be clogged. If old fuel was left in the chainsaw for a long time some of the volatile ingredients may have evaporated, leaving a thicker, stickier product that is more like varnish or shellac. This sticky fuel can clog up the fuel filter and it can be difficult to burn making the engine run roughly. The only solution is to drain the old fuel from the fuel tank and replace the fuel filter.

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Foam Filter

If the foam filter is clogged, the chainsaw runs poorly. Check and then clean or replace the foam filter according to the manufacturers instructions for the chainsaw. The foam filter keeps sawdust and dirt out of the engine. Once it is clogged the engine doesn't get enough air which makes it run poorly.

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