I bought an ms 251 and for the first few hours it was great. Now it is repeatedly kicking the bar and chain. I went to the dealer and was too close to closing. I got 30 seconds of the tech's time and he said I probably bent the bar and should try putting on a new bar and chain. He also said the chain was too tight, but it was not actually seated properly when I handed it to him.
Long story short; I replaced the bar and chain and provided more play in the chain. It spins easily if I pull it when off. 42 2 minutes in the nut works loose and the bar and chain both point south. I know the nut is not on too loose as it is tightened down and does not move at all. I am a bit worried it will break the housing if I go tighter. Could it be the tree is too thick? It is an 18" bar and the tree is slightly thicker. Also the blade is not catching and is cutting free and easy through the tree.
Any thoughts would be appreciated.
Long story short; I replaced the bar and chain and provided more play in the chain. It spins easily if I pull it when off. 42 2 minutes in the nut works loose and the bar and chain both point south. I know the nut is not on too loose as it is tightened down and does not move at all. I am a bit worried it will break the housing if I go tighter. Could it be the tree is too thick? It is an 18" bar and the tree is slightly thicker. Also the blade is not catching and is cutting free and easy through the tree.
Any thoughts would be appreciated.