Description
Application: Twin Disc MG-509 marine transmission drive spider (P/N A4632). Cast-iron splined spider with square outer drive lugs that mate with the flywheel/damper drive blocks on the engine side of the MG-509.
Condition: Used take-off with heavy surface rust; splines and lugs intact with normal wear, no visible cracks or broken teeth. Ideal for rebuild, spare, or core.
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.