got a problem with my husky 350, that's been working like a dream til just now. changed the chain, tightened it up to short of where i wanted, finger tightened the nuts on the cover, adjusted chain tension, lifted the nose of the bar, tightened the nuts firm. all good, right? chain tension right what i wanted. chain will not move. check that brake is off. chain won't move. loosen nuts, chain will move but i am not about to operate a chain saw with loose nuts (ahem). take the bar and chain off. sprocket seems tight, but i can turn it and it loosens up to what it should be. reassemble. chain doesn't move.
any ideas?