Detroit Diesel 4-53 Marine Diesel Engine with Marine Gear - Used Core

Application: Detroit Diesel 4-53 series inline 4-cylinder two-stroke marine diesel engine with marine gear, heat exchanger, raw-water pump, alternator, and expansion tank. Appears to be a naturally aspirated 4-53N based on visible configuration. Condition: used core / untested running take-out — heavy surface rust, peeling paint, debris present; not test-run by seller. Engine serial and marine gear tag must be read directly from the data plates to confirm exact model, rating, rotation, and gear ratio. Heavy freight item; sold on pallet/skid, fluids drained and ports capped before 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.