STIHL MS660 CHAIN MOVES WHEN PULLING STARTER CORD

[Treeation]

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!

[josharb87]

Clutch springs?

 

Have you taken the side case off (clutch side) and had a look? 

[htb]

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

[Treeation]

Awesome thanks guys will check it out!

 

[Treeation]

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

[spudulike]

You may have clutch slip or weak clutch springs. Something caused the bearing to melt and that would be excessive heat. 

Depends if it was left on idle and failed then or using flat out in a big cut!