Marine Heat Exchanger Tube Bundle Core Insert with Zinc Anode Port - Used

Application: Replacement tube bundle / core insert for a marine diesel engine shell-and-tube heat exchanger (jacket-water or raw-water cooling). Finned tube stack with integral side zinc-anode boss and O-ring sealing surfaces. Condition: Used take-off, drained, structurally sound, O-rings and anode not included. No OEM part number visible — fitment must be verified by measuring your existing bundle and confirming engine model/serial. 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.