Possible Impeller issue? NEWBIE

[Miitch]

The other day I pulled my sea doo boat from the water as it was cavitating pretty bad. Just a simple stick (was jealous of you Yamaha owners and your clean out ports for a hot second there).

while i was down there, I noticed a slight gap? Between my impeller and the drive shaft it looks like. Along with a small amount of rust. I’m a new jet boat owner - less than 2 weeks - is this something that’s normal? Or should I fix it.

 

[WREKS]

It contains iron so rust is possible. Staying wet will accelerate rust. I do not think it is a problem. I would inspect from time to time.

 

[Rick215HO]

The other day I pulled my sea doo boat from the water as it was cavitating pretty bad. Just a simple stick (was jealous of you Yamaha owners and your clean out ports for a hot second there).

while i was down there, I noticed a slight gap? Between my impeller and the drive shaft it looks like. Along with a small amount of rust. I’m a new jet boat owner - less than 2 weeks - is this something that’s normal? Or should I fix it.
View attachment 122776View attachment 122777

Somewhat hard to judge from your pictures but it looks like the impeller boot is showing threads or missing. Also you seem to have a gap that needs to be checked on your wear ring, possible source or cavitation.

If there was no obstruction and it was me: I would pull the pump out to check the impeller boot, check there is no water inside the pump, bearing condition (smooth movement), and check the wear ring clearance.

I'm attaching a picture of my pump so that you can see how the impeller boot should look. There should not be a gap near the impeller.

 

[Miitch]

Somewhat hard to judge from your pictures but it looks like the impeller boot is showing threads or missing. Also you seem to have a gap that needs to be checked on your wear ring, possible source or cavitation.

If there was no obstruction and it was me: I would pull the pump out to check the impeller boot, check there is no water inside the pump, bearing condition (smooth movement), and check the wear ring clearance.

I'm attaching a picture of my pump so that you can see how the impeller boot should look. There should not be a gap near the impeller.

That gap in my picture is what was worrying me... Ive been on the water 3-4 times since but it still doesnt look normal. I can get by with fixing mechanical problems on cars and such, but this is my first boat. I can access this by going in from the nozzle and leaving the intake grate on, correct?

 

[Rick215HO]

That gap in my picture is what was worrying me... Ive been on the water 3-4 times since but it still doesnt look normal. I can get by with fixing mechanical problems on cars and such, but this is my first boat. I can access this by going in from the nozzle and leaving the intake grate on, correct?

Yes, you remove the pump from the nozzle side, no need to remove the grate.
This should give you an idea of the process to take it off.

p.s. not suggesting you have to change your ring, the video is just so that you can see how the system works.

 

[Miitch]

Yes, you remove the pump from the nozzle side, no need to remove the grate.
This should give you an idea of the process to take it off.

p.s. not suggesting you have to change your ring, the video is just so that you can see how the system works.

Guess i have myself a little weekend project! Thanks for the video

 

[Kyle Mekulik]

That’s a aftermarket solas impeller in there and the green impeller boot needs to be reinstalled with loctite that might be your source of cavitation...

 

[JTrottaNY]

^^^ What he said, not a bad job to pull the impeller off and resecure that boot. IIRC it is ussually packed with grease which yours has likely lost. Might want to invest in the correct grease before you pull it apart, also loctite 518 for the pump seals - if it was re-insalled correctly youll probably see the sticky red residue when you pull it off.

If it were me and I was going that far I would take a look at the o-rings on the pump housing, neoprene seal and wear ring while I was in there.