leaking air?

[Pale Rider]

OK, if the pump seal itself is known to be good, and the carbon seal is good also, and everything else checks, where could you possibly be sucking in air?...PR...

[Pale Rider]

^^^ ?...

[RX951]

intake grate bolt ?
are you positive the carbon seal is good ?

[Pale Rider]

intake grate bolt ?
are you positive the carbon seal is good ?

Hi Billie!, new carbon seal, boot in great shape, pump seal in good shape, (I have 2 so I tried them both) have stainless wear ring in good clearance of .009, props are perfect... nose cone in place.
at first I had a bit of cavataion with the 3 blade, found sand in pump seal, swapped the seal and corrected condition. swapped back to stock prop and you can literally make the ski stand up when mashed, so it`s hooking up well.
The reason I`m asking/searching is i`ve tried 3 different pitch props almost all within the same R`s and speeds, maxed out at 7600-7650 and have more throttle to go. It was suggested to me by a prop tuner to check for air leaks. everything looks good, no cracks, so I`m at a loss...PR...

[Shibby1485]

if you have multiple props all hiting 7600+ with more throttle to go, doesn't it only make sense ur running against the rev limiter

bend a prop on ur own or find one that runs 7550 and let me know what happens... just for chits and giggles

[Pale Rider]

if you have multiple props all hiting 7600+ with more throttle to go, doesn't it only make sense ur running against the rev limiter

bend a prop on ur own or find one that runs 7550 and let me know what happens... just for chits and giggles

I`m to chicken to bend my own . I know I`m on the limiter...PR...

[Shibby1485]

so realistically any evidence or comparison or speeds or RPMs are 100% irrelevant until u get all 3 props off the rev limiter

give lenny the prop and a wrench, i bet he'll set ya up right

[Pale Rider]

so realistically any evidence or comparison or speeds or RPMs are 100% irrelevant until u get all 3 props off the rev limiter

give lenny the prop and a wrench, i bet he'll set ya up right

speed gain between 3 props, yes, by 1-2mph, but yes still on the limiter, never really paid attention to how much throttle was left until I read here the correct way to pitch a prop was to use all of the RPM band... so that`s what I`m looking into...PR...

[GTXX]

the pump shoe and pump support both can leak air. it's only about a 5 minute job chop-chop, get to it!

usually an air leak will cause you blow the prop out from a dead stop then it will pick up enough speed that it is not noticable, kind of like a slipping clutching slowly hooking up. if yours holeshots good I would say prop pitching is needed.

[watermedic]

I doubt that this will have anything to do with your set-up Andy, but make sure and check your drive shaft next time you have things apart. I am sure that a slight defect in my D.S. is what caused me some major problems a couple weeks ago. There was no vibration or anything until I hit 8400+ RPM's, then it felt more like a cavitation. Sh*t hit the fan before I could figure things out.