Good luck, when do you get to run her? your right, the old motor was 250 at the foot and the new one will be about 290. I'm trying to remember the size of the prop, a change of pitch up probably will help some as well. I'll try to borrow a prop to do this. I know this boat is heavy and the extra hp will hopefully get me up somewhat quicker but not kill me on the gas pump side. Any idea what this boat should use prop wise? Also, it didn't come with vented prop, do inboard outboards need this as much as an outboard?
. The prop that came off is 14" X 19 Pitch. What cha think, try a 21 possibly? I agree with the sweet spot, my maxum cruises sweet at about 28 mph and and wasn't bad on gas. I know the 4 bbl will eat much more at power up and wot, but hoping the cruise will be about the same. AS to the ability to move quickly...it is nice to have the speed when needed to get off the water or stay ahead of the storm. I had a 21 ' checkmate with a 250 hp merc and it cruised at 50 and wot speeds were 75 mph. Chine walked bad and you had to fight it through this. As for the C-17, I was one of the chief loadmasters on the program here at Charleston and we spent a lot of time at the "beach" with McDonald Douglas.<br />Last question for now: My merc outboard used a vented prop for obvious reasons for the hole shot. Is there any benefit on a bigger boat like this to use a vented prop? I know some exhaust is through hub, but most is from the back of I/O housing. Milkyway...what prop are you running? Pitch that is...
