How do i tell what kind of motor my boat has it says its an omc says 235 hp on the valve covers ?

-It is a Ford 351 block, reconfigured to be a marine engine. The answer to whether you can substitute cheaper car parts is usually no, particularly starters, alternators, etc as they could cause sparks and engine fires or explosion in a confined space like a boat.It is a Ford 351 block, reconfigured to be a marine engine. The answer to whether you can substitute cheaper car parts is usually no, particularly starters, alternators, etc as they could cause sparks and engine fires or explosion in a confined space like a boat.