I'd like recommendation on re-powering my 1964 Formula Thunderbird Tri-Hull. I now have a 1985 Mercury 75 HP engine with very low hours. Thinking of going to 75HP Honda 4-Stroke. The difference in price between 3 different engines is not that much. The Honda outboard is 350lbs. Nor sure how heavy the boat is. We put so few hours on the boat, that I'm not that concerned with getting out of the hole.