Marine automobile engine

The differences include changes made for the operating in a marine environment, safety, performance, and for regulatory[1] requirements.

[citation needed] All of the "Big 3" American auto companies have had engines marinised at some point.

Chrysler is notable, because the company marinised engines in-house through Chrysler Marine, as well as selling engines to third parties such as Indmar or Pleasurecraft Marine.

That means four-bolt main bearing caps instead of just two; sometimes the crankshaft is forged steel and the pistons an upgraded aluminum alloy.

Most importantly the camshaft profile is different with the overlap ground to 112 degrees instead of 110.