Replacement Echo CS3600,CS3700,CS3900,CS400,CS4100,CS4200,CS4400,CS5100 Sprocket Drum .325 7 Tooth : A556000171, A556000172, #14980

fits : ECHO CS3600, CS3700, CS3900, CS400, CS4100, CS4200, CS4400, CS5100

Replaces : OREGON: 513442, ECHO A556000171, A556000172

tags : Echo sprocket drum .325″ 7‑tooth replacement A556000171 , A556000172, fits ECHO CS3600, CS3700, CS3900, CS400, CS4100, CS4200, CS4400, CS5100 chainsaws, heavy‑duty aftermarket sprocket drum compatible with OEM specifications for smooth chain engagement and long‑lasting performance.