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Thread: 300x pump seal

  1. #1

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    300x pump seal

    I took my intake grate off today because i noticed it was`nt fitting exactly the way i wanted,but while i had it off i looked through the intake opening only to find the rubber seal that goes between the pump and transum plate was hanging down inside the pump.It seems that these seals are to big for the pump.They dont fit snug like they should! Every Kawasaki ive ever had before that seal fits snug around the pump with no play at all but this seal is way bigger than the pump infact it creates a lip that hangs down inside the pump all the way around,That has got to cause a flow problem inside the pump.Has anyone else noticed this?When i put the solas impeller in that was the first time the pump had been off my ski i put a little bit of marine grease on the seal to make it slide on easier wonder if it made the rubber material stretch or ballon/swell cause in definately dony fit snug like it should.


  2. #2
    Take the time to smile sirbreaksalot's Avatar
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    NEVER use petro based grease on rubber seals
    vaso or RUBBER grease is designed for the exact reason you are talking about ( seal swell )

    just get a sharpy and trim the seal back ,

    next time your pump is out replace seal

    Waz

  3. #3
    Quote Originally Posted by jeff007 View Post
    I took my intake grate off today because i noticed it was`nt fitting exactly the way i wanted,but while i had it off i looked through the intake opening only to find the rubber seal that goes between the pump and transum plate was hanging down inside the pump.
    Any photos to show what you are saying?
    How many hours on the ski?

  4. #4
    nicjak's Avatar
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    yep im with waz, you have made it swell i only ever use soap (car wash) on that seal.

  5. #5
    Take the time to smile sirbreaksalot's Avatar
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    Sorry but I disagree 100% , I just pulled my pump 2 days ago on my 1.5 hr old 2012 300x

    and as you can see by the pic the seal fits 100%
    and it IS a firm fit over the pump , and the picture shows how it has clearince to the inner pump size when they have not swelled from any grease/petro lube
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  6. #6
    Take the time to smile sirbreaksalot's Avatar
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    only problem I see is that the pumps NEED to be assembled with a lube from the FACTORY in the housing because when the dealer 1st starts them they NEVER use water and the prop rubs the liner and picks up a burr , I have found that lubing a FRESH prop/liner stops this from happening or dont start the ski unless prop is in the water , once the prop wears abit it seems to happen alot less

    I honed my marks out before I put the SOLAS in , I also checked to ensure it was round and it was perfectly round at that point............

    Waz
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  7. #7

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    Quote Originally Posted by meangreenman View Post
    Any photos to show what you are saying?
    How many hours on the ski?
    Sorry!! I should have taken a few.I already put it back together.I took a trimming razor and trimmed it out from inside the pump once i got it all back together. ordering a new seal as waz suggested, next time no petroleum base products on my seal. Ive always used water and a little dish washing soap dont know why i put the grease on there.
    I used waz`s photo to give you an idea,My seal when bolted on hangs inside the pump ares where the RED marker is all the way around 1-2mm`s and if i hold my pump like this photo my seal sags down 10 mm`s below the outer edge of pump ! where the white marker is.you can actually see daylight between the pump and seal if you hold it up like the photo.
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    Last edited by jeff007; 07-29-2012 at 07:02 AM. Reason: add photo

  8. #8
    nicjak's Avatar
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    live and learn lol

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    Quote Originally Posted by nicjak View Post
    live and learn lol
    Yep and i did`nt have good luck with that blue nose cone either as mine came loose and slid up the shaft and out of sight! Impros told me to glue it on!

  10. #10
    nicjak's Avatar
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    waz has been told

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