Chainsaw Repair

3 quick things........ Is there any kind of build-up or debri on the inside of the clutch drum?..........Is the bearing or race for the drum moving freely?.......Where there any washers/spacers maybe worn-out,not installed correctly or missing within the clutch/drum assembly?..... All 3 have given me problems at one time or another on any given saw and all with a similar problem as you are describing....