I Have A Never Used 334t When Tighting Up The Bar Nut The Chain Wants To Stop Spinning Freely To The Point Of Hereing Metal Against Hard Plastic Seems Like The Clutch Cover Is Bottoming Out On The Top Of The Clutch Am I Missing A Spacer I Dont Want To Fire Up The Saw With This Happening Is This Common This Is A Brand New Saw Bought On E-bay ???