MerCruiser was developed by Mercury Marine, the American marine-engine company founded by Carl Kiekhaefer in Wisconsin in 1939 and acquired by Brunswick Corporation in 1961. Mercury introduced its MerCruiser sterndrive line in the early 1960s, combining an inboard engine with a drive unit through the transom, and the brand grew into one of the most widely used names in recreational boating.

MerCruiser is known for dependable gasoline V6 and V8 packages, many based on proven automotive block designs such as the small-block 305 and 350 and big-block 454 and 502 engines, together with the Alpha and Bravo sterndrive families and in-line marine diesels with D-Tronic injection. This breadth makes MerCruiser documentation valuable across a huge installed fleet. Numbered factory manuals such as those covering the small-block 305 and 350 and big-block 454 and 502 engines follow the service program Mercury issued over many model years.

The workshop manuals on this page cover MerCruiser engines and drives in factory detail, including engine overhaul, carburetor and electronic fuel-injection systems, fresh-water and raw-water cooling, sterndrive and outdrive service, electrical systems with wiring diagrams, torque specifications and diagnostic procedures such as ECM fault finding. Genuine MerCruiser documentation is the reference marine professionals use when setting alignment, adjusting drives and torquing critical fasteners.

These documents are intended for boat owners, marine mechanics, boatyards and buyers of used MerCruiser-powered craft. Following the manufacturer's procedures keeps engines and drives reliable, safe and ready for the water.