Honda 130 prop question

[fishingdad]

I know this subject gets beat to death sometimes but the more I dig into finding a prop the more confusing it seems to get. I have a lund 1800 fisherman with a honda 130 and a Stainless steel 13" x 16 prop and I can not get over 36 mph (gps reading) My cavitation plate is even with the bottom of the boat and everthing else seems like it matches up but what size pitch should I have to gain some top end speed without losing the holeshot terribly? If a 19, 21 or whatever caused some holeshot loss no big deal since we don't ski or anything anyway. or isn't 36 mph w.o.t. really all that much slower than it should be able to do Thanks for any info that anyone has. Bill

[logon648]

Need to know your rpms at WOT. The newer 130 Honda has a 2.00:1 gear ratio. The theoretical speed of your boat with a 16 pitch prop at 5500 rpms would be 41.5 mph. If you are running at 36 mph you are getting about 13% slippage. Thats not to bad. If your rpms are at 6000 that would bring your slippage up to 21%. If thats the case i would recommend a different prop or add some cup to the trailing edge of the blades and also on the tip's to give your boat some lift and reduce the drag.

http://www.soderbloom.com/proprepair.html

[Hemlock]

2001 Honda 130 on a 21' Sylvan 5200 RPM WOT 17 pitch prop (aluminum) = 40.0 mph/gps

Same set up with the 19 pitch (aluminum) gets me 5000 RPM WOT and 42.5 mph gps