prop slip & effiencey

[fkboatman]

how do you figure what your prop slip is and what should it be,yes i know you want it low but how do you figure it out. someone help

[slovolvo]

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

[Forkin' Crazy]

I have one on my computer. PM me your email address and I'll send it to you. Lower is better, but around 10% is as good as it gets on most boats. On my Allisons I have gotten a bit under that.

[tpmarine.com]

Check this out...it takes the guess work right out.
http://www.livorsi.com/catalog/DataTach.htm