Repower 1988 25 ft. Grady trophy pro twin 180 hp. mercruiser

[JeffN]

Re: Repower 1988 25 ft. Grady trophy pro twin 180 hp. mercru

I have a 1981 Grady White Wahoo 256 with a 454 straight inboard. It has a 1.72:1 Borg Warner gear and 16" prop. I get around 1.5 gallons per hour at around 3800 rpm. Speed in that range with boat averagely loaded in freshwater is around 27 knots.

Like I said though, this is a straight inboard, not an inboard outboard.

You are burning 1.5 GPH at 27 knots :jaw or is that 1.5 miles per gallon? I think I burn burn 1.2 GPH at idle.

 

[dwtanner]

Re: Repower 1988 25 ft. Grady trophy pro twin 180 hp. mercru

Love typos.................GPM

 

[JeffN]

Re: Repower 1988 25 ft. Grady trophy pro twin 180 hp. mercru

OK I guess I can cancel ripping out my I/O now and switching over to straight inboard :wink:

 

[JUMPNJACK]

Re: Repower 1988 25 ft. Grady trophy pro twin 180 hp. mercru

Like Jeff, I was geting ready for some major mods also! Too good to be true! Fishing time is coming! 8)