I went from twin 200 EFI's on a bracket to a single Yamaha F250 on a 4 stroke. I went from hour 850-1300 on it this year and it ran flawlessly. When I am by myself and the livewell empty it jumped right up on plane and was perfect. Would run 28 kts at about 11GPH. As soon as I added 4 people and 40 gallons of water, I had to shift some people up front to get on plane, once on plane there wasn't an issue. but performance dropped to about 26 kts at 13-14 GPH. I can't really keep the boat on plane in anything less than 22 kts. I went to a 4 blade prop, changed pitch, all that stuff.
To echo what Bushwacker said, I did the 1" per foot thing and it definitely put my engine too low. I raised two holes, and I am still debating whether it is too low or not. I have a 30" leg, I am almost thinking I may have wanted a 25". I think I may try raising it another hole before I put the boat back in this year.
All that said, if I had it to do over again, and a few bucks, I would go with the 300 yamaha for sure.
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