I think I found my source of cavitation.

[docster]

So after chasing the cavitation all last summer, I decided to really go after it before I get busy this year. Last year I replaced my carbon seal. And replaced both rubber boots by the PTOs. I had no bad leaks coming from that area, but still had horrible cavitation from the port side pump. So I decided to try the wear rings, even though I knew they were only one year old. So today I remove the pump, and examine them closely. This is what I found. One of the veins has a large chunk missing, two of the others have smaller chunks missing. I presume it was from when the previous owner changed the wear rings and used a rod to keep impeller from spinning.

Do you agree this is causing my cavitation??

A local repair place has an excellent condition used pump I can have for $150. Does that sound fair??

 

[Coastiejoe]

[MENTION=41828]Minnetonka4me[/MENTION] will likely have what you need and or be able to give an accurate price...

 

[Nike12000]

Think that's a very good guess that's where your cavitation is coming from. Good luck hope [MENTION=41828]Minnetonka4me[/MENTION] can help ya out!

 

[Minnetonka4me]

yup the plastic ones suck. Although light, one rock and they are done. What is this off of? I sell brass 140mm pumps pretty cheap.

 

[docster]

Off a 1998 sportster 1800

 

[Minnetonka4me]

Ok someone actually swapped that one in. It should be a big hub 140mm pump and that is a small hub. The big hubs were better for the boats, but harder to find and more $$$ I do have a really nice one in stock ready to rip.

 

[docster]

So you're saying the pump is smaller than it should be? I thought the sportsters had the plastic pumps.

 

[Minnetonka4me]

They had plastic, but big hub pumps had countersunk Allens holding the cone on. The picture you posted has regular bolts on the edge. That's 100% a small hub.

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[racerxxx]

In 98 the only boat that got the big hub pumps was the speedster. You can verify this on the micro fiche.

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