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  1. #1

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    through the hull bearing movement

    hello iv tried searching but didn't find anything. i just replaces the impeller and wear ring on my 96 sl 900 got it all back together and turned it over and noticed the through the hull bearing has some movement in it when the drive shaft spins. i don't remember ever seeing this be for but iv also never looked at it while it was turning over. so what i am wondering is this normal movement or should it be dead center with no movement?? Thanks


  2. #2
    Click avatar for tech links/info, donation request K447's Avatar
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    The brass bushings inside do wear over time. You can replace the bushings and rebuild the through-hull assembly with new seals.

    My signature link has the details, in the jet pump section.

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    i have seen the how to on the rebuild but doesn't really answer any of my question does this part move a little with the rotation of the drive shaft is that why there's a piece of flex hose looking stuff with hose clamps on it so it can have some movement???

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    Click avatar for tech links/info, donation request K447's Avatar
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    When the bushings and driveshaft aren't worn, the carrier rides almost snugly on the drve shaft.

    With engine not running, you should not be able to wiggle or shift the carrier from side to side or up and down. It should just sit there and barely move.

    With engine running the through-hull bearing carrier should not be shaking, wiggling or rotating much at all.

    If the drive shaft is not perfectly straight then of course the carrier will be moving as the shaft wobbles, but that would suggest you need a new drive shaft.

    The flex hose section is there to allow the carrier to self align with the drive shaft, and to accommodate any movement of the engine on its rubber engine mounts.

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    heres a vid sry cams kinda shaky but you can see the bushing move.

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    Looks to me like the carrier is following the drive shaft movements.

    With engine not running, can you move the bearing carrier by hand?

    If you really want to know, remove the drive shaft and the carrier from the hull. Slide the bare carrier onto the appropriate portion of the drive shaft and check how much play or 'slop' there is.

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    if i try to move the whole bearing side to side or up/down no movement or very little but if i hold the end (engine side) i can move it a tiny bit using my finger tips. if that make any sense?

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    Quote Originally Posted by scottl1346 View Post
    if i try to move the whole bearing side to side or up/down no movement or very little but if i hold the end (engine side) i can move it a tiny bit using my finger tips. if that make any sense?
    Sounds about normal to me.

    As long as the seal lips are still good and it is well greased it should be fine.

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    awesome that kinda what i was thinking but wasn't sure because i never noticed it move be for. yeah i grease it every other ride i give it a couple pumps going to change over to the bel-ray water proof grease its a little thinker then the stuff im using so i think it will work better

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    Click avatar for tech links/info, donation request K447's Avatar
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    Do you ride in saltwater?

    Two pumps of grease every other ride seems like a lot of grease. That grease must be escaping out around the shaft seals almost as fast as you are pumping it in.

    If the seals are good then I would expect you to feel resistance/pressure to pumping more grease in.

    My recommendation is to use a good quality waterproof lithium grease.

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