I know it's just a guess but I'm curious.

 

A ) A boat rated for a 200hp running less than WOT

 

B ) A boat rated for a 115hp running WOT at the same speed

 

We'll assume both boats are on plane and the boat rated for the 200hp is larger in comparison (as you would expect). One boat is lighter but the other isn't working the motor as hard.

I getter fuel economy out of my Merc 2.5 Pro Max Sporty on a 21' Bullet running under 50 mph than in my 18' Xpress with a Merc 115 elpto at WOT.

Cruising speed which is 3000-3500 rpms in most cases will give you the best mileage in whatever you run.  A 1600lb boat with a 250 running at 50 mph will get better mileage than the same boat running the same speed with a 150 because  of the difference in rpms. Also from what I've read, 3-4mpg is the max you will get from a 2 stroke running @ WOT

Also from what I've read, 3-4mpg is the max you will get from a 2 stroke running @ WOT

I would not have bought my boat if I had seen this stat last year. :-)

OK..........maybe I still would have bought it.

Usually the 200 will get better mpg and it will definitly last longer because it won't be ran as hard.

I have a smart craft gauge hooked to my 225 Optimax.  4000-4500 rpms gives me my best consumption rate.  WOT it is 1/2 gallon per minute.  So WOT is not very often.