Question about Husqvarna Husky 165

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Piston ring the compression has gone on my husqvarna 346xp,so i asumed it would be the piston or the piston ring,however the piston looks fine but the ring is quite loose and im not sure how loose or tight it should be round the piston, please help, thanks

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Re: piston ring

The piston ring whilst the piston is still in the pot should be relitivly tight. This is because it creates the seal to maintain compression. When the ring is taken off the piston it only has about 4mm gap between the two ends, any more than this it's probaby knackered. worth checking pot and piston for scoring around the exhaust outlet as if it's going to loose compression it will be at this point. If all these are fine check the decompression valve (if you model has one) if this is broken your compression will be ruined.

Posted on Sep 21, 2009

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