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Thread: Outboard jet pump issue?

  1. #1
    Member ptarmigan's Avatar
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    Default Outboard jet pump issue?

    I've noticed more grease coming out of my vent hole opposite of the grease fitting on my jet pump. I'm wondering if this is normal or do I have a bad seal? I pump in just enough grease to make some come out of the tube each time I use the boat. I use one of those low pressure pumps that are designed for the job. Any thoughts?


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  2. #2
    Moderator bkmail's Avatar
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    Might be time to pull it apart and rebuild the bearings.
    Regardless, it would give you piece of mind.
    Bk
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  3. #3
    Member ptarmigan's Avatar
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    Well that's what I was wondering. Is there a need to do that or is this normal? Don't really want to put new bearings and seals in right now if I don't need to.


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  4. #4

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    Quote Originally Posted by ptarmigan View Post
    Well that's what I was wondering. Is there a need to do that or is this normal? Don't really want to put new bearings and seals in right now if I don't need to.


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    What does the condition of the grease exiting look like when you pump in new? If it's milky then you may need a rebuild and or new seal sleeve on the shaft.
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  5. #5
    Moderator bkmail's Avatar
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    Quote Originally Posted by ptarmigan View Post
    Well that's what I was wondering. Is there a need to do that or is this normal? Don't really want to put new bearings and seals in right now if I don't need to.


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    Then run it and keep an ear out for any grinding crunchy noises.
    Grease it good and finish the season.
    Bk
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  6. #6
    Member ptarmigan's Avatar
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    It's hard to tell unfortunately because I changed over the type of grease I used per Marita last year. They stopped carrying the type I had been using and said the new kind was now recommended from Outboard Jets. The new grease is more of a clear yellow compared to the whitish grease I had in there. I'm guessing there is still some of the old stuff coming out.

  7. #7
    Member ptarmigan's Avatar
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    Quote Originally Posted by bkmail View Post
    Then run it and keep an ear out for any grinding crunchy noises.
    Grease it good and finish the season.
    Bk
    Grinding crunchy noises make me cringe. I will be greasing it after every trip until I can get it in.

  8. #8
    Member Sobie2's Avatar
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    I lost a jet bearing while upriver and the indication was a loss of power as the driveshaft dropped and the impeller wore into the wear ring. I was losing grease between the underside of the impeller vs out the side like you. Around Southeast us outboard jet people use Mercury 2-4-C grease.

    Sobie2


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