Help! Z520 Silverado edition 250 xs prop!?

[jbird_]

2009 z520 running a 26 fury getting 5200 rpms at 60 mph...

Motor has been checked out multiple times and is fine, what prop should I try?

[Ranger391v]

Cool! I got a '09 Z520 Silverado Edition as well! ........... running a 26" Fury4, but on an eTec though. Runs a solid easy-70 fully loaded with 2, and 72-74 single and light depending on things.

Are you running an older 2 stroke Optimax Pro XS or a new 4 stroke Pro XS?????? If it's the 4 stroke, then you'll need to drop down to like a 23" (based on what the typical Z520/4 stroke combo's are running), but even then those numbers you posted are low. If it's a 2 stroke, then there is either something wrong with the motor, the prop shaft height, a transducer location, the prop is messed up, or something.

Based on the numbers you supplied, that's like 18% prop slip .......... my duck boat with a chewed up prop at the end of duck season doesn't have that much slip.

[jbird_]

I appreciate the insight, and nice boat! The motor is an 08 250 XS... The local shop said I should be running like a 23 or 24 with tha with those kinds of rpms. How can you tell there's slip? Btw no ducer on back...

[mdtritn21]

Even that prop should get you more than 60 mph if it's any good. It's showing 21% slip now so something is wrong. How high prop to pad are you running it? The best prop for that boat and motor is a 25.5 Bravo xs set at 2.5" under pad.

[jbird_]

Update. Just tried a 24 fury 3 blade and got 5650 rpms at 70mph. Wow that made a difference!