Detroit Diesel Inline Marine Diesel Engine - Used, Untested

Application: Detroit Diesel two-stroke inline marine diesel engine, believed to be a 71 Series (likely 4-71) based on visible architecture, blower, and cast 'Detroit' lettering. Positive model and rating confirmation requires the Detroit unit number stamped on the block pad or a legible data plate. Condition: Used, untested. Sold as a complete-appearing take-out / rebuildable core. Not test-run, not bar-turned on our bench, no compression or oil pressure data available. Cast number 5125423 noted on the block (casting number — not an orderable service part number). 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.