3/8 7 Tooth Rim Sprocket Fits Echo CS451 CS500 CS600 CS660

Two-piece rim sprocket, 3/8 pitch with a 7 tooth rim, that fits the Echo CS451, CS452, CS500, CS510, CS550, CS600, CS610, CS650 and CS660 chainsaws with metal bodies, including the older CS600EVL. Replaces 17500514330. The later plastic-bodied versions take a different sprocket. A 3/8 rim drives only 3/8 chain; replace the rim when it is grooved, and fit a new chain with it. Grease the needle bearing and check the clutch while the drum is off.

• TWO-PIECE RIM SPROCKET, 3/8 PITCH, 7 TOOTH - A drum with a replaceable rim. Replaces 17500514330.
• FITS ECHO CS451, CS452, CS500, CS510, CS550, CS600, CS610, CS650 AND CS660 - The older saws with metal bodies, including the CS600EVL.
• NOT THE NEWER PLASTIC-BODIED SAWS - The later versions of these models with plastic bodies take a different sprocket. Check the old part before ordering.
• MATCH THE CHAIN PITCH - A 3/8 rim only drives 3/8 chain. Grooves in the rim where the drive links sit mean it is time to replace it, and a new chain on a worn rim wears both.
• FITTING IT - Grease the needle bearing, check the clutch shoes and springs while the drum is off, and make sure the rim floats freely on its splines.