definatly Outboard ,shift shafts, bellows,points condesors ,waterpumps,closed cooling,caps rotors wiring,I could go on ,the Marinas just smile when the I/Os roll in its where they make there $$$$$,unless your stuck on I/O make sure its atleast a Alpha 1 unit with the big 6 or small 8 the rest is worn out hard to get parts for ,hard to find someone to work on crap