[THEFERMANATOR]

Originally Posted by evilgli

with the 15X17, 3/4 of a tank of fuel, 3 guys on the boat, tackle, ice, no tabs, boat will do 43MPH and engine will turn 6000 RPM WOT.. i will give it to the 200 ocean runner, she likes to scream and suck the fuel..haha

You may want to have your prop and tach checked. Your numbers come out to 17% prop slip which is HUGE for WOT. 8-12% is the normal range, but much more than 10% is pushing it. Something definately isn't right with those numbers. I get roughly 2-3% prop slip with my APOLLO prop which gets me EXCELLENT bite and economy. You may be able to improve your economy noticeably just by re-propping and checking your set-up.

Next time your out check your engine height like in this post and see where your plate is in the water column underway. If it is too high that will cause your excess prop slip.
http://www.propgods.com/forum/default.aspx?g=posts&t=97

I would suggest you try and find one of these for a prop. A 15 pitch in a MIRAGE PLUS would be just about ideal for your app and speed. You might also want to have your tach checked for accuracy to make sure it's reading right.
http://cgi.ebay.com/ebaymotors/New-M...item2ea8b29e0b