SO……

[Destroyer]

Originally Posted by charlie_the_tuna

2001 115TXRZ. runs like a champ but just a touch to light for the V.

Agreed. I have a 110hp on my 16.5 Airslot. Perfect. But I would think a 150 or a 200 would be better for the V20's. Have you tried different pitch props to make sure you aren't lugging the engine at WOT?

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[charlie_the_tuna]

the guy gave me a brand spankin' new aluminum prop with the sale. i'm 100% sure it's not optimal for the application. fact is all my numbers would improve with the right stainless prop. the other fact is with all the nickel and diming this thing has done, the boss would have my balls if i were to even think about another $400 to $500 for a new prop. maybe eventually i'll find a decent used one, but for now... my numbers, gas economy and speed will suffer.
i just keep telling myself i'm back where i belong. who gives a crap how fast i get there?!?

[Destroyer]

Originally Posted by charlie_the_tuna

the guy gave me a brand spankin' new aluminum prop with the sale. i'm 100% sure it's not optimal for the application. fact is all my numbers would improve with the right stainless prop. the other fact is with all the nickel and diming this thing has done, the boss would have my balls if i were to even think about another $400 to $500 for a new prop. maybe eventually i'll find a decent used one, but for now... my numbers, gas economy and speed will suffer.
i just keep telling myself i'm back where i belong. who gives a crap how fast i get there?!?

ok, lets get back to basics. What size prop do you have on her now (dia/pitch) and what does your engine turn at WOT?

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[charlie_the_tuna]

We’re turning 5,200@22mph. I think the prop is 14X17. Don’t quote me on that. I’ll take a look tomorrow.

[Destroyer]

Originally Posted by charlie_the_tuna

We’re turning 5,200@22mph. I think the prop is 14X17. Don’t quote me on that. I’ll take a look tomorrow.

Book says 4500-5500 rpm @wot. So if you're running a 17P prop you're on the high side of the range.
Given that I would think it would be safe to go up to a 19P prop for testing. That will give you less rpms, but maybe more speed. 18P for a SS prop.

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[spareparts]

that bottom paint is whats killing your speed

[charlie_the_tuna]

Yeah, the paint is a big part of it. The aluminum prop is an issue as is the size and pitch. I don’t know how to figure out the right numbers and if I did… I couldn’t afford it anyway. When I pull her out, I’m gonna hit the hull with a super stiff brush and take off as much paint as I can. Then I’ll figure out what my next move will be.