1996 SPX Bearing Scream

[GeekDad66]

I'm currently about to rebuild my jet pump due to 'bearing scream' while running in the backyard (and yes, I had a hose attached). I changed the oil last fall (like I do every season). After running at idle/low speed for 2-3 minutes, the scream appeared so I shut down and the drive shaft seemed very warm/hot near the bellows boot. For the life of me can't figure out how the the drive shaft seals where it comes through the hull. The following pic is a breakdown:



The rear end of the bellows boot (item 17) clamps to the hull. The shaft passes through item 7 (ring carbone, according to manual). This does not get a bearing here???

Item 14 (292 000 075 thru hull fitting, according to manual) appears to be the only item that can seal. Does this have a seal AND bearing in it? Online pics don't really depict it too well. If so, how is this part replaced?

The pump doesn't look horrible so I'd rather not go through the hassle/expense of the rebuild if the thru hull fitting is the real problem and I'd have to pull apart a second time. Anyone have experience in this area? Any help before I tear pump apart would be greatly appreciated!

Thanks!

 

[ocod]

I'm currently about to rebuild my jet pump due to 'bearing scream' while running in the backyard (and yes, I had a hose attached). I changed the oil last fall (like I do every season). After running at idle/low speed for 2-3 minutes, the scream appeared so I shut down and the drive shaft seemed very warm/hot near the bellows boot. For the life of me can't figure out how the the drive shaft seals where it comes through the hull. The following pic is a breakdown:

Bearing scream? Only bearing is in your pump where your prop is.
Yes, it needs water to keep cool and may get hot? Not sure but that is what you can not run them on the hose for extended periods.

View attachment 12904

The rear end of the bellows boot (item 17) clamps to the hull. The shaft passes through item 7 (ring carbone, according to manual). This does not get a bearing here???

No

Item 14 (292 000 075 thru hull fitting, according to manual) appears to be the only item that can seal. Does this have a seal AND bearing in it? Online pics don't really depict it too well. If so, how is this part replaced?

No. Its has epoxy.

The pump doesn't look horrible so I'd rather not go through the hassle/expense of the rebuild if the thru hull fitting is the real problem and I'd have to pull apart a second time. Anyone have experience in this area? Any help before I tear pump apart would be greatly appreciated!

You should pull pump and inspect it through

Thanks!

The carbon seal is a floating ring that pushes against the SS collar by the ribbed rubber hose as you accelerate.
The thru hull fitting was a problem ripping out when you had a sealed carrier and didn't add grease. It would rip a hole in your hull thus sinking you in seconds if bearing sized to driveshaft. Seadoo did away with that idea.

Hope this helps

 

[GeekDad66]

ocod
Thanks for the info. I will pull pump apart and inspect since it is out. I'm still not clear as to how the drive shaft seals thru the hull. So is the only thing sealing out the water the O-ring on the carbon ring collar?

Thanks again

 

[ocod]

ocod
Thanks for the info. I will pull pump apart and inspect since it is out. I'm still not clear as to how the drive shaft seals thru the hull. So is the only thing sealing out the water the O-ring on the carbon ring collar?

Thanks again

The O ring under the SS collar making water tight seal on driveshaft.
Rubber boot with floating ring pushes against SS collar making seal.
If you pull boot back while in the water, water will pour in.

 

[GeekDad66]

The O ring under the SS collar making water tight seal on driveshaft.
Rubber boot with floating ring pushes against SS collar making seal.
If you pull boot back while in the water, water will pour in.

I FINALLY got the pump rebuilt. Water IS now leaking in from the the front of the boot. There is a LOT of float between the carbon ring and drive shaft. When I pulled the pump out, I left the shaft installed. Could I have pushed the shaft too far forward or not enough? I still don't understand how this is a good seal

 

[ocod]

Did drive shaft have rubber end pieces?

You can adjust accordion boot on thru hull fitting but water should not leak through CR and SS collar.
If you push back on boot water will pour in.

And yes the CR inside diameter is wider than drive shaft and is held in accordion boot. The shaft spins inside CR.

 

[GeekDad66]

ocod
Seems like you're the one with instant responses. By rubber end pieces do you mean item 12 in the picture of my original post? If, so I did not notice on the pump end. Wouldn't this push shaft further in and away from acordian boot? How much adjustment can I get out of the acordion boot on the thru hull fitting?

 

[ocod]

^
Found this.
http://www.seadooforum.com/showthre...native&highlight=carbon+seal+ring+alternative

Its better to put it back the way they intended.

Just right time/right place.
Its good to close threads so others how to fix problem.