cobra marty

Around 3000-3200 rpm seems to be the best for max MPG and hence miles per tankful. This seems to be where the hull and engine are at their best/most efficient. You'll have to check your boat to see what mph that equals.

dyno

in three weeks are you nuts???its cold and rough till july up there!! is this for fun or to move the boat? If you just need to move the boat rent a dually and pull it!!

Miami

most planning hulls are efficient in the low to mid 40mph range. Assuming that happens in your boat in the 3000 to 3500 range, with no positive tab and no throttling for rough water, you should burn 24 to 30 gal ( combined ) per hour.

Chart

There is a formula for horse power from gas that aviation uses. I don't recall it, but contact Jafo here on the board, and I'm sure he knows it. It should also work for all engines.

PatriYacht

That trip is a little dangerous this time of the year. Water temps will still be in the 30's up north. Fog is a problem even on nice days with the cold water. I would take dry suits along just in case you end up in the water. It'll kill you in minutes otherwise. Are you sure you don't just want to tow it on a trailer? Pay for the diesel and I'll give you a hand.

glassdave

my best guess is

1) fill tank before leaving
2) run till about empty
3) pull in some where and fill tank again
4) repeat steps 2 and 3 until trip is completed.

WickedWon

For most gas engines the rough rule of thumb is 7.5 gal. per hour for every 100 hp at 80 % of throttle cruise. That should add to the confusion

My experience with moderately powered twins in V bottoms, when the trip is over you'll have used just about 1 gallon for every point to point mile you supposedly went, if you were paying REAL attention. Ever looked at the past track lines at the end of the day on the gps ? At least if you've been drinking you'd have an excuse.

Nauti Kitty

Pleeeeeeeeeeeeeeeeeeeeeeease Who in the world do you think you are fooling?

Poorsche

If youy've got EFI engines the controller outputs GPH burned. You can get the data from a SCAN tool. Probably not much help at this point but a way to get data in future.

Check RINDA Technologies web site--

http://216.230.203.183/home.html
http://216.230.203.183/marine/mtspec.htm

Poorsche

glassdave