burned up bar and chains

[cartecz1]

I recently bought a stihl ms 660 magnum. I have been having problems with the chain oiler. I burned up a 32" bar and 2 chains after turning up the oiler as far as it would go. I tried thinning out the oil and opening up the oil hole in the bar. After I run through a tank of fuel there is at least a half of tank of oil left. I even went so far as to purchase a woodsman pro 36" bar and .063 with a 404 and it still heats up. any ideas?
Bill

 

[sal b]

dump oil and try cleaning out oil tank. could be a lot of sht in their

 

[Stihl Super]

sounds like you need a new oil pump or may be worm gear.:welcome:

 

[Lakeside53]

The worm drive spring end may be broken off and not engaging the clutch drum properly... Happens if the clutch drum bearing get worn and the drum wobbles.