I purchased 2, P5 5 blade 28 pitch 15 ½ diameter props from Hydromotive and gained 6 MPH on the top end so far and I know there is more if I get more seat time. My boat is a 28 Eliminator Daytona Cat, Twin HP 500’s Top Speed So far 100 at 5050 RPM. Past top speed with Bravo 4 blade 30 pitch 15 ½ diameter props 94 MPH. Drive gear ratio 1:32 Here is my Problem. The boat has a problem getting on plane. The props blow out and the engines rev and the boat cant get on plane with 3 people on board. My 2 passengers had to go up in the cabin to get on plane & with 2 people in the boat I can get it on plane with some real gentle throttle work. I would have thought that 5 blades would get better grip so to speak than 4 blades? Any Suggestions would be greatly appreciated !

If your P5 props don't have a diffuser rings have them installed. But you need to remember that you have to give to get.

Julie

Thanks for your Input Julie. They do have diffuser rings on them but after explaining my problem to Hydromotive a gentleman named Tom had suggested I send them back to have a larger diffuser ring installed & that might be my next move.

I don't have diffuser rings on my P5Xs that I am trying and I have more of an issue getting on plane than with Bravo 1s. What a difference throught the mid-ranges.

The P5X props have small diffuser rings, when stock.

Julie

you can also extend the diffuser , say an inch or inch and a half.