Prop Challenge

[einsteins]

Hi all

I have a Z7 with 200hp ProXS
Running a 25 Fury B&B from Mark Croxton
When I am alone in my boat with full gear and 1/2 tank of fuel I am hitting about 68-70mph but RPMs are only getting to 5350 to 5400 rpms (Merc Monitor)
Run a Bob's action jack 8" Jackplate
I have to run the prop fairly deep to get the best speed I have to set jackplate to 4.5" Below Pad. If I run 3 or 3.5" below pad I lose a good 4 to 5 MPH

I am thinking I need to move down to a 24 Fury to get rpms up but not sure in my case that a 4 blade would be a good solution.

My spare prop is a 24 tempest B&B from Croxton and I can get the RPMs up to the 5600 range but speed is not there at 65-66 mph.

Need some advice from you more experienced set-up guys.

Thanks!

[skennedy]

You must have a ton of gear in that boat my dad had the same boat and motor 26 fury on tournament mornings he could turn it 5750 r and run real close to 70 .

[einsteins]

2 power poles and jackplate add a lot of weight.
I would say I am on the heavy side. I got rid of one of the 4 batteries couple years ago, Mark said he added some extra cup to my props when he B&B'd them.

[nitro2130]

I just repowered my z7 with a 200hp proxs and have only had it on the water once. I went with a 25p fury 4 and I got over 60mph not trimmed up at 3/4 throttle. Plan on going out in a few days to finish break in but you shouldn't have a problem breaking 70mph solo from what I've gathered. Doesn't really sound like those props are working for your setup but that guy is pretty good from what I've heard....

[Savage]

You should test a virgin 24P Fury and 23P Tempest in an effort to achieve 5700 LOADED (how you normally operate the boat) RPM's.

[nitro2130]

I think Savage is in the right direction, I'd try a 24p fury to start and see where you're at. You should blow a 23p tempest plus out of the water and if you can't something is broke. That's what I ran on my z7 with a 150hp.

[einsteins]

I need to find someone with a 24 Fury so I can test....

Or try and trade my 24 Tempest for one...