Recent purchase, ran good, now a problem

[Prizmatik]

I recently purchased a 2011 GTI 130, and a 2011 GTI SE 130.
Both need work, but 1 was good to ride immediately and I've had it out about 4 times now.

I started having a problem yesterday. Ultimately everything was fine while riding, when all of a sudden I lost propulsion and developed a vibration. I was able to slowly get to shore with the vibration and lack of propulsion.

I've researched, but still new to watercraft repair. I've removed the jet pump and have taken pictures of the spline and and wear ring. I appreciate all help. Thanks in advance.

 

[ski-d00]

Can you see the small piece of stick stuck on the left in the first picture between the impeller and your wear ring? That is your problem and all it takes to cause cavitation and a severe vibration.

 

[Prizmatik]

Can you see the small piece of stick stuck on the left in the first picture between the impeller and your wear ring? That is your problem and all it takes to cause cavitation and a severe vibration.

Thanks for responding.
I have no idea what that small piece was, but didn't seem like a stick. It was definitely stuck on the impeller until I flicked it off after the pictures I posted.

Crazy to think that piece would cause the vibration too.
So......basically the wear ring is fragile when it comes to debris, and the impeller can be thrown off balance easily?

 

[Coastiejoe]

Chances are there was more in there and it came out when you put the ski on the trailer.

But yes, a twig can cause serious cavitation and vibrations.

Your wear ring has some marks in it but still looks good to go to me.

 

[ski-d00]

Put the pump back on and test it. It will be just like it was. Cavitation in the pump is a very sensitive thing and doesn't take much at all to keep the pump from working properly. The vibration is caused from uneven loading on the impeller from the eddies and turbulent flow created from the small disruption in laminar flow on the one side of the impeller.

 

[Prizmatik]

Put the pump back on and test it. It will be just like it was. Cavitation in the pump is a very sensitive thing and doesn't take much at all to keep the pump from working properly. The vibration is caused from uneven loading on the impeller from the eddies and turbulent flow created from the small disruption in laminar flow on the one side of the impeller.

Great idea. I will reinstall and test soon for a comparison.
Also,' thanks for helping me understand how the pump works in relation to the water/flow causing vibrations. I'll update when I get back on the water.

 

[red2blue]

I sucked up a baggie once. You'd a thought I had lost a blade off my prop. You might wanna check the grease in that thing before you re-install.

 

[Prizmatik]

I sucked up a baggie once. You'd a thought I had lost a blade off my prop. You might wanna check the grease in that thing before you re-install.

Checked the grease, looked good. I attached a picture.