Boots, Bearings, and too much heat...

[MontanaXP]

Thru-Hull / Needle Bearing Gets Hot

I have a '94 SeaDoo XP And recently seized the needle bearing where the shaft goes out the hull. Simple enough, I bought a new shaft, new needle bearing, lip seals and carrier, also a new rubber boot and clamps. Put it all back together and the bearing gets so hot it burns me! So I figure I tweaked it putting it together, sure enough it's stuck, so I get all new bearing and carrier and lip seals and have it professionally assembled, yay it spins, go home put it on the shaft, clamp it down and 15 seconds later it's almost too hot to touch AGAIN! Can anyone help? Is this bearing supposed to get hot? Is it supposed to spin freely or be just a little snug? Any help would be a lifesaver! Will try to get pictures tomorrow, but it's all new parts. Also checked alignment and all is well. I pulle dthe rubber boot (hose) and held the bearing with my hand and it still got hot, so I am thinking the lip seals or the bearing are not correct in some aspect. All is original equipment.

 

[MontanaXP]

Pictures

The Aluminum colored deal is the carrier with a needle bearing in the center and has a lip seal on each end. That is the part that gets hot, about 15-30 seconds after starting the motor. The bearing is not bound up on the shaft and is still free and lubricated. You will also see a new thu-hull that was epoxied in after the old one was ripped out when the bearing seized (somone had used a piece of pvc conduit for a thru-hull). If the thu-hull is mis aligned could i get a bad angle on this bearing and get heat?the rubber hose flexes to allow for some play in the alignment I would think. Thanks in advance.

 

[seadoosnipe]

Needle bearings.........

On the housing that holds your needle bearing, do you have both double lipped seals still in place? One for the front of the needle bearing and one on the aft side. These seals are what hold the grease in.

Your comment about alingment is very valid. If the engine to pump alingment is off, significantly, then yes, it will cause over heating of that roller bearing, quite fast!...............good luck

Oh BTW.........great pix!.....they are worth a thousand words. I wish everyone did that!

 

[MontanaXP]

Both lip seals are still in place and the bearing is full of synthetic grease. I don't think alignment is my issuse because if I float the bearing on the shaft and hold on to it with my hand, then start the motor the bearing still gets hot. Is there maybe just a break in period for the seals/bearing where it will be hot for a while?

 

[MontanaXP]

Well one more trip to the SeaDoo dealer yields nothing so all I can get out of anyone, and the last thing to do is just put it in the water and see what happens. So I reassembled everything and am going to head out to Salmon Lake and hopefully have a good time.

 

[MontanaXP]

Well I made it out to the lake and had a good 2 and a half hours of fun in the sun. The bearing was pretty warm all day but didn't give me any problems. I only had problems after I threw myself about 20 feet off my jet ski and she wouldn't start after that...until it was out of the water then it started. So I put it back in and barely got it to run, seems to be starved of fuel. So tomorrow I will replace all fuel lines and get rid of that nasty gray fuel line and go through the carbs with some cleaner.