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STIHL MS660 CHAIN MOVES WHEN PULLING STARTER CORD


Treeation
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Hi,

 

My 660, which was working beautifully last week, is playing up. Started it up to fell a big cherry stem and it cut out when I applied chainbrake, then tried to restart it and the starter cord snap back like mother ducker despite me pusing in the decompression button, god that proper smarts! Now when I try and start it the chain moves around as I pull the cord and cant get it running.

Never had this problem with a saw in the 13years I have been doing tree work

 

Any ideas?

 

Thanks in advance!

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Check clutch needle bearing, also check for foreign debri in clutch mechanism such as baler twine and that the clutch shoes are free on the centre. Could also be weak/broken clutch springs.

That will do for starters

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Managed to strip back the saw, to discover the needle bearing had melted into the clutch drum hence the problem! I was blocking down a big ash stem with it before and the saw chips blocked up in the side case and started burning! I took the side case off and removed the burning mass of chips but didnt look any further into the clutch at the time. Hopefully a new needle bearing should be all I need to get up and running again

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