chainsaw hard to pull

Old 10-20-19, 05:06 AM
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chainsaw hard to pull

Husqvarna 435 clutch melted. once replaced pulls hard. Pulls easy with spark plug removed.
Old 10-20-19, 06:25 AM
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Sounds like fuel leaking in cylinder. After plug pulled does a shot of gas shoot out of plug hole wen first pulled?
Old 10-20-19, 08:19 AM
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Take the chain off and see if it pulls the same.
Old 10-20-19, 12:15 PM
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Is the spark plug wet? Sounds like gas/oil in the engine crankcase and cylinder.
Old 10-21-19, 09:54 PM
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Back in the mid-'90s, my Dad gave me a 1970s-vintage Husqvarna 61 because it had the same symptoms as yours.

As others have mentioned, it turned out to be fluid (bar oil) leaking into the cylinder causing an increase in compression due to hydrolocking. So, I'd remove the plug, spray WD-40 in there, let it sit a while, then give it a half dozen pulls. That had the effect of cleaning out the oil and breaking up the carbon deposits. Still a bit hard to pull once I put the plug back in, but at least it started.

Did that for several years before I got tired of it. My solution was to buy a new Husqvarna with a decompression valve. My arm and shoulder both gave a sigh of relief.

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