I just ordered a 23p QIV X for my 26 Powerquest w/stock 454mag EFI. Just wonder if anyone else has any experience with one of these props on a single engine application.
I have been running a 23p & 21p Mirage plus with mixed results.

I live somewhat near Hydromotive, They are some nice people over there.
I bought a Q1V a couple years back.
My cruise speed picked up nicely with the 4 blade and probably saves me a good little bit on gas.
Had my prop Rec. labbed by them in the spring, But I can't give you a comparison because I just rebuilt my engine before.

Are you running a standard QIV? What size boat ,prop & power are you running?

509 9.5-1 comp. 23 Baja Not sure exactly on HP number. Im guessing around 500. 24 pitch
Far as I know they are still exchanging props for around $30. if it does not work out.

running that xact prop only left hand. Planes a little slow but well worth the gas milage I get. Pushes my boat 67 on the river got 73 out of it at KY lake. I think you will like it!

What power are you running in the Fountain?

I assume you have the X series. That will be the better choice for your hull than the standard Q4.

Yep your correct.Had a chance to run the 23p tonight and it's heading back.Little to big a wheel. Slower out of the hole than my 21 Mirage Plus. Very nice cruise speed however. 4000 rpm at 50mph. I'll have to double check tomorrow agin with the 21 but I beleive that one ran 45mph at the same RPM. Top was another story it was a little rough at 2-3' and all I could get was 54mph at 4400rpm. It was a handfull at that. I'm thinking maybe a 21p