yamaha F115

[eggsuckindog]

I have a F115 on my 20' '71 seacraft and love it...3 people, 60 gallons gas, offshore fishing gear, ice ect...we cruise 27kts @ 4500 rpm...average gas mpg is 4.5miles/gallon...wot w/ 20 gallons, 2people is 38kts @5900 rpm...

Those are excellent numbers, although I have the same boat with a fresh 200 merc and you couldn't pay me to run it with less than 150 but I guess thats me.
Second reason, I wouldn't consider buying one with only 115 - I wouldn't want to try and sell one either and deal with the constant "Seems unpowered" question a million times. These are pretty high permance hulls and need HP to work properly, but your happy with yours and it seems by those numbers very close to my 200, thats strong for a 115- I'm at 3800 to get 27kts I think thats about 31/32.