prop question

[Joe Potaczek]

Hi I have 2010 nitro z7 200 pro xs does anyone know what the best prop would be for this and how hi the jackplate should be up? I have a 6 inch jackplate and 26 pitch tempest plus runs 71.3 gps at 5750 rpm

 

[Rich Eder2]

Can you say Derek Chance???

 

[Bob Bourget2]

Need more stats...especially water pressure. Keep going up on the jackplate until....

-you see water pressure at 15 psi MINIMUM OR

-there is a reduction of "lift" {the ability to hold the bow up} OR

-a speed reduction....usually as a result of one or more of the first parameters.

As a side benefit, the boat will have less tendency to chine-walk. With the increased jack height, If you see more prop blow-out coming out of the hole, don't worry as the brief 5000-6000 rpm launch will not hurt the engine. Tuck it in all the way and hammer down...

 

[Joe Potaczek]

Thanks for the reply Bob I have over 20 psi water presure at wot. It chine walks a little bit do you think i could up on the pitch?

 

[Bob Bourget2]

If you can gain speed with going up, and you are not on the rev limiter then leave it alone...I'd rather see it spin, lugging is the death of these motors.....

 

[Joe Potaczek]

Alright thanks Bob