Trimmer Repair - Replacing the Clutch Drum (Ryobi Part # 791-153592)

If your string trimmer is showing any of these symptoms; replacing the clutch drum could solve your problem: 1) Trimmer head not rotating under throttle 2) Trimmer head stops when under load (when the line contacts the lawn, weeds, etc.) 3) Drive shaft not engaging 4) Clutch not engaging drum 5) Clutch drum (lining) is stripped (engine/throttle works fine; but drive shaft does not spin). 6) Loss of torque during use Tools used for this repair/replacement: 1) Receptacle for draining fuel 2) Phillip’s screwdriver 3) Ratchet and socket set 4) Torx wrenches 5) Starter rope (or similar object) for binding engine 6) Spark plug wrench or socket 7) Adjustable wrench [ VIDEO TRANSCRIPT ] Common issues of the clutch drum, is wear to the mounting location where the flexible shaft mounts to the clutch drum. The square corners will get rounded off. Also, wear to the inside of the clutch drum. This is where the clutch itself expands out and makes contact with the drum. Replacing the clutch drum is easy to do and I’m going to show you how. Clutch drums, as well as many other parts, can be found on our website. Let’s get started. I’ll begin by removing the rear cover. Now we have access to the carburetor and the throttle cable. While it is possible to remove the throttle cable from the carburetor’s linkage without removing the carburetor, it’s very easy to accidently break the cast end on the end of the throttle cable. So, I’ll go ahead and remove the two screws that secure the...