Description
Application: Yanmar marine diesel engines (4JH2 and related) with Kanzaki KBW20 / KM4A marine transmissions. This is the Aisin-built torsional drive damper (Yanmar P/N 177090-03500) that mounts between the engine flywheel and the gearbox input shaft to absorb driveline shock and torsional vibration. Five coil-spring packs and a splined center hub, 'AISIN' cast into the face.
Condition: Used take-off in serviceable condition — springs intact, spline shows normal wear, no visible cracks. Light surface oxidation from storage.
Buyer must confirm fitment by part number, photos, dimensions, engine model, serial number, and application before purchase. Used marine part sold as-is unless otherwise stated. No returns on electrical, used, special-order, or installed parts.