prop selection

[14Invader]

Hey guys, First post here. Wanted to pick some brains. I have a 14' Gw Invader under restoration and I am on my way to pick up a shortshaft 75 Johnson next week. I plan on running the PRO50 T&T. Question is, while I'm gathering parts, anyone have any prop advice? Anyone have anything similar to my set up?

Thanks!

[25XS]

Welcome to the messageboard! I'll be the first to chime in and answer a question with a question... Does the 75hp engine have the stock, fishing engine size gearcase & gear ratio or does it have the smaller (40/48/50hp) Nitro size gearcase and if the Nitro gearcase, which gear ratio is inside?

[14Invader]

Thanks 25XS! It does have the nitro case 15" mid. I will know more about it when I pick it up next week. I believe it has the 15:28 (1.87) gear ratio.

[25XS]

Ok, with that engine, here is a starting point; http://www.boatracingfacts.com/forums/showthread.php?17499-Critchfield-Setup&highlight=Allison+critchfield+Canada

Your boat bottom is probably not tuned for racing and heavier than a Critchfield racing boat but the props listed will get you started.

[sharpeye Mike]

Get a Jeff Brown cleaver from Ron Hill in a 22" pitch. It pushes my 13' Delta to 68 MPH with a warn out 56 cubic inch Stinger

[14Invader]

Thanks for the replies! I have always been under the impression that cleavers were more for tunnel boats? I’m more used to larger 18’ v hulls si the smaller boats are a bit new to me. My boat should way between 300-350

[sharpeye Mike]

Thanks for the replies! I have always been under the impression that cleavers were more for tunnel boats? I’m more used to larger 18’ v hulls si the smaller boats are a bit new to me. My boat should way between 300-350
Depends if your boat needs extra bow lift. most small padded V bottoms do quite well with a cleaver

[14Invader]

Interesting. I guess I’ll find out! I’ll take your advice though for sure.