a friend of a friend has a 350 mercruiser that is efi. it is in a big 26 foot reinker or some brand like that, he wasnt to clear. he said that with a full load of people and gear that the boat has problems getting on plain, like it is down on power. my question is, does anyone here know of a good hp gain that he can do that is not to involved. something like a new chip or a good small bolt on super charger kit that is available for these engines. well any info or suggestions are greatly appreciated.