looking at a boat with a 2001 Mercury 250hp EFI. bought new in '02 and supposedly has only 12 hrs on it. never owned a merc. any opinions/advice on this engine? any known problems with this model or year? any things to look at?<br /><br />thanks-<br /><br />also- what would be the cost difference btw the same year 250hp efi and a 225 optimax. which engine would you prefer?