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A sterndrive or inboard/outboard drive (I/O) is a form of marine propulsion which combines inboard power with outboard drive. The engine sits just forward of the transom while the drive unit ( outdrive or drive leg ) lies outside the hull .
SeaCore is a brand of sterndrive marine propulsion systems manufactured in the United States by MerCruiser. The SeaCore engine design utilizes materials, technologies, and systems, created specifically for Mercury Marine, to prevent galvanic corrosion within its engine, transom and drive.
The engine sits just forward of the transom while the drive unit (outdrive or drive leg) lies outside the hull. Volvo Penta holds a US patent for the Forward Drive.
The business also manufacturers sterndrive and inboard drive systems such as the Volvo Penta IPS. [3] The engine program comprises petroleum fuel ( diesel and gasoline ) engines with power outputs of between 7.5 and 1,500 kilowatts (10 and 2,039 PS ; 10 and 2,012 bhp ).
As of 2019, APBA sanctioned Class One racing is being held by Powerboat P1 under the name Class One USA, with catamarans racing strictly regulated sterndrive Mercury Racing 9.0L 1100 hp twin turbocharged V8 motors, and unlimited power for mono-hulls.
Holes are designed into the casting to support internal sand forms and to facilitate the removal of the sand after the casting has cooled. These holes generally have no factory designed purpose after the sand has been removed although some aftermarket temperature sensors may be installed into the location of a core plug on some engine designs.
Later that year Kiekhaefer used his boat engineering and NASCAR skills to develop the 100 hp stern drive engine now known as MerCruiser. When Kiekhaefer resigned as president of the company in 1969, the company name changed to Mercury Marine. In 1970 he founded Kiekhaefer Aeromarine Motors, building racing engines.
It is a four-stroke, vertical, water-cooled diesel engine. It is built around two cylinders (hence the "2" in 2GM20) of 75 mm in diameter and 72 mm in stroke, adding up to 0.635 litres in displacement: each cylinder is roughly the size and volume of a 300 ml soft-drink can.