Yanmar Gear-Driven Raw Sea Water Pump for 3JH/4JH Series - Used

Application: Gear-driven bronze raw sea water cooling pump for small marine diesels, most consistent with Yanmar 3JH/4JH-series engines (reference OEM 129271-42500 series). Engine-mounted, gear-driven design with square 4-bolt flange, threaded inlet, and barbed hose outlet. Condition: Used take-off. Exterior verdigris and light gear-tooth rust from marine service; shaft rotates. Internal impeller/seal condition not verified — plan on a full service kit (impeller, cover gasket, seals, o-rings) before return to service. Pump will be drained and ports capped prior to shipping. 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.