Three Eighths Inch 6 Tooth Spur Sprocket Clutch Drum Assembly Kit For Echo CS 370 400 400F 370F 4200ES 420ES Chainsaws Replacement Parts A056000181 A556000401 A556000400

3/8-Inch 6-Tooth Spur Sprocket Drum for Echo Chainsaws
✔️ Pack: 1; fits Echo CS-370/400/370F/4200ES chainsaws.

This spur sprocket drum assembly is a replacement part for Echo chainsaws, used to drive the chain and engage the clutch on models like CS-370, CS-400, CS-400F, CS-370F, CS-4200ES, and CS-420ES.

✅ Size: 3/8 inch (9.525 mm), 6-tooth spur sprocket drum
✅ Replacement Part Numbers: A056000181, A556000401, A556000400
✅ Compatible Models: Echo CS-370/CS-400/CS-400F/CS-370F/CS-4200ES/CS-420ES
✅ Pack: 1 kit

💡 What is a spur sprocket clutch drum assembly used for in Echo chainsaws and how does it affect clutch operation?

It's the replacement part that transfers engine power to the chain and keeps clutch engagement reliable.

- drives chain rotation and clutch engagement in Echo saws - reduces wear, extending drive-train life - compatible with CS-370/CS-400/CS-400F/CS-370F/CS-4200ES/CS-420ES - easy replacement to restore performance