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Mccullough chain saw pm610 chain slips -- maybe clutch issue

The engine runs fine, but the blade will not run fast to cut wood. It worked fine today, and then after letting it set for 30 minutes the engine started up fine, but when the trigger is pulled, the chain saw blade just moves slow. I removed the cover, cleaned and replaced. The blade is not too tight and can be moved by hand.

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  • anh883row Jan 03, 2009

    The chain break is not jammed. The chain rotates freely when the engine is off. How do I check the clutch?? Is there a manual on line to download for this?
    Thanks,

  • anh883row Jan 03, 2009

    I tried it again this morning, same results. Chain moves freely, and break turns on/off just fine. I did notice a lot of oil leaking. Any other suggestions,

    Thanks,

  • anh883row Jan 07, 2009

    You asked: have you greased your clutch bearing ever I will ask the owner, as the chainsaw is not mine, just borrowed. Any diagrams or manuals that I can download on line to find the clutch???

  • sanfordcongo Feb 21, 2009

    I have a Montgomery Ward chainsaw. The chain will slow to a stop while cutting but the engine runns at full throttle.



    Is there a remedy for this?



    Dkip

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Have you greased your clutch bearing ever.some times they get dirty and tighten up after running a while.pull your clutch off and clean and grease bearing with a little alex grease,and I mean just a few drops.not meant to have a lot of it,too much will burn the crank shaft and you will have more problems then you started with

Posted on Jan 07, 2009

  • steve
    steve Jan 07, 2009

    the clutch is on the chain drive side.you have to remove the the drive sprocket.some times you need special tool to remove it.

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I just had this problem. It is possible that your chain drive teeth have jumped off the drive sprocket. There is a guide for the chain to follow and is decievingly difficult to verify that the teeth are in the drive sprocket. Turn the saw upside down, and look at the clutch. Check the chain to see if the chain is actually on the sprocket and not beside it. It looks right, but it's not.

Posted on Jan 12, 2009

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Hope the chain brake isn't jammed on.
does the chain rotate easy bty hand when engine is off. If not check bar ,chain. and sprocket condition,may be jamming up or don't oiling.
610 clutches are on a taper so can slip or break if over tightened.

Posted on Jan 03, 2009

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Maybe I'm reading this wrong, but it sounds like you are saying your chainsaw is newer and runs fine, but it just isn't cutting wood well?

If that is the case then it means the chain wasn't sharpened correctly. Lots of guys do it at home and don't file down the raker teeth in front of the cutter heads, so the teeth don't grab into the wood and just nibble at the wood and make fine sawdust. It is always best to get the chain sharpened at a saw shop first so you can get an idea of the correct angles and depth of the rakers etc. After that you can try to match the saw shop for a while with a round file to take off ragged edges unless you have a decent professional saw sharpening unit.

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The make, model, and occationally the serial number help us solve your problem.

Does the engine quit running? (Carburator needs adjustment)
Or does it continue running and chain stops? (need clutch refaced or replaced.) (to aggressive a chain for the size of the engine)

I think you replaced parts unnecessarily. Maybe quicker and cheaper to visit your friendly neighborhood chainsaw shop. A good one can repair it even if they do not sell your brand.
HTH
Lou

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1 Answer

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Hi

Before other checking change the spring of the clutch(2).

best regards savumihai71

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