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Chainsaw Won't Start

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 8 most common part(s) or condition(s) which contribute to the symptom Chainsaw won't start 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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Spark Plug

Every chainsaw relies on a spark plug to ignite the air-fuel mixture for proper combustion. Over time the electrode on the spark plug will burn away and the engine does not start. If the engine does not start, remove and inspect the spark plug. If there is any doubt that the plug is working properly replace it.

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Carburetor

If the chainsaw won't start, 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 it hard to start the engine. 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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On - Off Switch

Chainsaws are equipped with an on/off switch. If the chainsaw does not start, this switch might be defective. Check the switch for continuity. In the on position the switch should have continuity.

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Safety Switch

If the chainsaw does no start, the safety switch - or throttle control switch - might be defective. If the switch isn't engaging with the throttle it won't provide enough fuel to the engine and the engine does not start.

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Ignition Coil

If the chainsaw engine does not start the spark plug may not be getting voltage. Power to the spark plug is provided by the ignition coil. The ignition coil is mounted next to the flywheel. As the flywheel spins an electrical current is induced by the ignition coil. If the ignition coil is defective it will need to be replaced, it is not serviceable.

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Rewind Spring

The recoil starter assembly has a rewind spring which spins the pulley backward to rewind the starter rope. If the rewind assembly is broken the rope will not rewind and the engine does not start.

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Recoil Starter

If pulling the recoil starter assembly handle doesn't engage with the engine and the engine does not start. Repair or replace the recoil starter assembly.

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Recoil Starter Pulley

The recoil starter pulley winds up the starter rope when not in use. If the recoil starter pulley is broken or stuck it may not rewind the rope and the engine does not start.

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