How Do You Calc. Prop Slip And How Do You Adjust For It ? My Old Pig In Nov. Went 51.5 @5500 With A Beatup 15 1/4 X 19 Miirage 3 Blade.250 Efi Yam.

Here's a couple links to play around with...

http://www.mercuryracing.com/product...s/propcalc.php

http://www.go-fast.com/Prop_Slip_Calculator.htm

I would get in touch with crb/ clark here on OSO.He's a expert in the prop calulation.lol

I Thought My Gear Ratio Was 1.50 But That Gives Me A 23% Slip.but It Might Be 1.75 Which Is A 10% Slip Which Is Dam Good.