96 XP800 Pump

[Salt1972]

Sea Doo Gurus- We solved our earlier carb problems - rebuilt a 2nd time with OEM Mikuni parts and that was the charm.

Now to solve a cavitation / aeration issue. I removed the pump and the neoprene seal and the rubber boot on the front of the impeller were all but gone. I ordered replacements and they're ready to go in.

HERE'S THE QUESTION:

There is a hard plastic "Impeller Ring" (Part #271000517). We have it, but it is much larger in diameter than the shaft and would seem to wobble around in front of the impeller boot. Do we install it or no?

Thanks in advance.

Matt

 

[Salt1972]

Nevermind and thanks anyway. I went to assemble and the rubber boot / ring combo made itself apparent. Assembly was easy and fast. Will test this morning. Let's hope for zero cav.

 

[Salt1972]

No Joy. The ski is rideable, but the cavitation on acceleration is still present.

CAVITATION. What are the possible culprits?

1. Impeller - stock and in good shape. A few nicks, but they've been filed flat.
2. Wear Ring - The tolerance to the wear ring is approx 1mm.
3. Neoprene Ring - new, just installed.
4. Impeller boot - new, just installed.
5. Impeller Ring - good shape.

What am I missing?

 

[AKnarrowback]

Reseal the ride shoe.

Just like a bent impeller or a worn ring a bad shoe to hull seal is one element that can let air in and give you poor hole shot performance.

It is simple to do, but takes a couple of hours. It might solve the problem, it might not, but it has to be considered when doing the check list in isolating your problem.

My 94 xp and 97 gtx both had hole shot reving problems, reving high in hard turns. The solution, after fixing everything else, was pulling the shoe off and resealing it. Now both are trouble free for pulling air in.

If you choose to reseal the shoe ignore the suggested pattern the shop manual shows for laying the bead of sealant on the shoe. Take the time to dry fit the shoe into the hull when things are cleaned up and think "if I was air what path would I take to get inside the pump" and then make sure that path is blocked by sealant. I have pulled some shoes off machines with minimal sealant from the factory, or in the case of the plastic gtx shoe I have seen the sealant bond fail on the plastic surface. A little too much sealant is not going to hurt unless you try to pull the shoe off again and have to fight things. In the case of my xp I used enough sealant to make the shoe "unremovable" which is just fine with me because it's sealed properly and won't have to come back off.

 

[AKnarrowback]

This is what you want to use.