How about you tell us what prop you have and what speed and rpm you are getting?... what mounting hole is the engine mounted on and can you see the cav plate skimming the surface while running flat out.
Fine tuning any boat comes down to what you want to use it for and the load you intend to push, so it would really help with any advice if you could let us know the basics
what i have now is a aluminium prop 3x13 7/8x13RH. have not taken it out yet b/c of the bad weather we have been having in sol CA. what i have plan to do it just have fun in the water and go fast. my load is my be 2 to 4 people max and some gear for diving. i also want to go to Catalina Island and camp there. so i want to go fast. ill take some photos of my engine mounts and post it up soon.
Your 13 pitch prop is probably the best choice for 4 divers, maybe a 15 pitch.
For 2 people with light gear, you could probably squeeze in to a 17 or a 19.
Expect 25-28 mph.
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Richard
Gluing geek since 2007
Opinions and intepretations expressed are solely my own and do not express the views or opinions of my employer
What is the engine manufacturers recommended WOT rpm range?
What WOT rpm have you got with your present setup?
Once you know that you can look at other props.
Can I suggest you have a read through this prop selection 'how to' from your engine manufacturer which tells you how to do it & why it's important to keep the range within their recommendations. http://www.evinrude.com/Content/Pdf/...ide_766315.pdf
