AISEN Clutch Drum Sprocket Bearing 3/8"-7T for Chainsaw MS311 MS391

If you have any mechanical skills it's just what you need to fix your MS311 yourself. Would suggest being careful when removing the "C" clip as it will go flying off if you don't have a cover over it as you remove it. Speaking from experience. Otherwise, simple replacement minus the labor cost at your local Stihl dealer.

This product was a perfect replacement for a very worn out sprocket. Didn’t know how bad the old one was.....or how it was affecting performance, until I installed the new one. Special thanks for including the “e” clip. Those things have a tendency to fly off when taking apart and was glad to know that I had a new one in the event that happened.

This part worked on my saw it was an exact duplicate

Works great