What could cause a squealing noise from a carburetor at full throttle on a chainsaw?

My chainsaw is making a rather loud squealing noise.

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Refer to your owner manual which should have a troubleshooting section. Look for carburetor, noises and see what they say. If your problem is not listed there then give the manufacturer a call. Usually customer service can refer the caller to a technician who can help you fix your problem.

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Answer by BlueEyes3b5 (121)

My Husky had a squealing noise this year and I couldn't figure it out to save my life. Finally I wound up taking it in to be looked at and it turned out to be soooooooo simple. The vent on gas cap was plugged up and caused the noise.

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Answer by ferfer72 (2623)

Your carburetor is sucking too much air--running too lean or too rich. Most likely, it's not your carburetor making the noise. It's probably a bearing at high speed. There could be something wrong with one of your gears, but again--that would be a problem with a bearing. Quit using it.

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Reply by Olddad (94):
There ARE some other reasons: It is usually recommended to give a good tune-up every year to all small engines including tractors, lawn mowers and chainsaws. Squealing or squeeking noises can usually be chalked up to something as simple as needing to lube the linkage and the alternator pulley. add a comment

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Answer by Liz59 (10966)

Well, there could be something stuck in the chain. So make sure and check if there is anything in the chain. It could also be that the chain is not carefully adjusted in terms of the chain being properly aligned in all angles. Therefore, just adjust the chain and you will be okay.

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