prop selection 101

[Edseler8]

I have a bone stock 115 Avidon Johnson on a 78 Viper. At 5500 rpm boat will run mid50's. Prop is 13x19. I pull kids on skis and have good hole shot. Want a bit more top end for cruising. Motor is not on a Jack plate or set back. Fixed position is 3/4 inch up from transom. Thanks.

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[Edseler8]

Guys, Sorry about the typo - Not an Avidon but a V-4 Johnson.

[mattyg1405]

idk what that motor should be at for WOT rpms but try a bigger prop for ex maybe a 22" pitch see what you turn for rpms then and what it does for your speed...
really depends on what you want to do with the boat

[hydrostream76]

yes and you're gonna have to raise your motor
right now it's set up for full power no top end
try raising it as high as it will go, a lift would help even a manual if you're gonna take your motor off anyway
then just switch props for wat you want to do
i have a V6 i run a 26 chopper, but for skiing i have to put the 19 pitch aluminum prop on

[Edseler8]

I can move the motor up a couple of inches and stay in the mount bolt pattern. Any thoughts on prop blade type. I ran a Michigan prop with chopper blades and it didn't seem to improve performance. It was a 13 x 21. I have looked at some 4 blade....ant feedback on the effects on a streamer.

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[hydrostream76]

a couple of inches ?
do u have it on the lowest hole ?
put it the highest it'll go without the lift,
you may find one in the meantime
and go from there,
you'll find a huge gain just raising your motor

[Edseler8]

hydrostream 76

I will get the motor up as high as possible without any addtional holes in the transom. I will take some pics with something other than phone and try to share. Thanks for the feedback!