"Greg" wrote in message
...
I have a new stainless 13.75x15 hubbed Merc if you figure out that is the
one
for you. It is a bit too much prop for a 60 big foot on a 20' Harris
pontoon so
it might be close for you.

I topped out at about 5100-5200 with it.

make me an offer.
http://members.aol.com/gfretwell/ssprop.jpg

That sounds about right.

I have a 90HP merc on a 20ft pontoon as well. The dealer
let me try 3 props before settling on the correct one.

If memory serves,,, we finally settled on a 15 which topped
out my 2-stroke @ 5200-5300.


db