Bowl lube
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Bowl lube

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    Senior Member Delemorte's Avatar
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    Default Bowl lube

    So how often should i top off the gear oil in my bowl? will i find water in it or should it stay pretty clean like engine oil?
    Quote Originally Posted by jetboatperformance View Post
    the ensueing fire would likely be extinguished by the sinking however

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    Senior Member fleetimus's Avatar
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    Good maintenance would be fill it everytime you take the boat out. Doesn't cost much and it will prevent problems.

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    Super Moderator HammerDown's Avatar
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    Depends...the two bushings found the the Berk Bowl stabilize the shaft. If their loose the shaft will wobble and no matter how new the seal is it wont "seal". Also if the shaft (like mine) has a groove in it from the seal again it won't seal very well.
    With that being said. I check my oil every other time out because I know it gets milky after a few days. Big deal, I take off both plugs and flush out the milky oil till it turns clean. Also...no "gears" inside, just a shaft and two bushings (Berk style)...so no need for high-dollar super-duper "gear Lube". Heck I now use straight 50 wt motor oil.
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    UMPBA.ORG sleekcrafter's Avatar
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    Quote Originally Posted by HammerDown View Post
    Depends...the two bushings found the the Berk Bowl stabilize the shaft. If their loose the shaft will wobble and no matter how new the seal is it wont "seal". Also if the shaft (like mine) has a groove in it from the seal again it won't seal very well.
    With that being said. I check my oil every other time out because I know it gets milky after a few days. Big deal, I take off both plugs and flush out the milky oil till it turns clean. Also...no "gears" inside, just a shaft and two bushings (Berk style)...so no need for high-dollar super-duper "gear Lube". Heck I now use straight 50 wt motor oil.

    lol... I bet you use that in the Bike Too!
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    Senior Member Delemorte's Avatar
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    Cool. Yea gear oil is pretty cheap stuff. just did not want to over do it..

    thanks guy. Ill go out and top her off.
    Quote Originally Posted by jetboatperformance View Post
    the ensueing fire would likely be extinguished by the sinking however

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    Super Moderator HammerDown's Avatar
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    Quote Originally Posted by sleekcrafter View Post
    lol... I bet you use that in the Bike Too!
    True dat...50wt keeps my ole shovel veeerrry happy
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    Default Grease Zerks

    You can also install a plug and a grease zerk. Lube with marine grease until it comes out the other side, just like gear oil, but more water friendly......Ray
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    Super Moderator HammerDown's Avatar
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    Quote Originally Posted by Moneypit View Post
    You can also install a plug and a grease zerk. Lube with marine grease until it comes out the other side, just like gear oil, but more water friendly......Ray
    Ray, some do...however (my) way of thinking is...
    To properly support and center the shaft the clearance between the pump shaft and the 2-tail bushings is somewhat close. I don't see "grease" making it's way between the two to actually do anything. If it did as soon as the shaft spins the grease gets pushed aside and there it stays. Also keep in mind, normal 'wheel' bearing grease is designed to liquify/flow as the bearing/wheel assembly gets hot...no way does the pump shaft or the tail part of the bowl get hot enough to get grease flowing.
    Just my two cents worth
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    Senior Member Delemorte's Avatar
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    As i understood it the newer jets use grease but the older ones used oil... I didnt think it really mattered one way or the other.. Then again WTF do i know.. this is my first jet :-). I just replaced all my seals and bushings so ill continue to use oil until it wont hold it any longer.
    Quote Originally Posted by jetboatperformance View Post
    the ensueing fire would likely be extinguished by the sinking however

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    Senior Member BrotherWolf's Avatar
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    well whats better oil or grease????..... I picked up a split bowl that has been used with grease........but not sure if I should go grease or clean it out and go to gear oil...Sorry Im on my first jet boat also.

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    Senior Member Delemorte's Avatar
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    Quote Originally Posted by BrotherWolf View Post
    well whats better oil or grease????..... I picked up a split bowl that has been used with grease........but not sure if I should go grease or clean it out and go to gear oil...Sorry Im on my first jet boat also.

    I want to say the older boats used oil but the new ones use grease.. I could be wrong.. A pro will speak up im sure. I used grease before my rebuild, at the suggestion of a pro, as my seal was all jacked up and it seemed to work fine for a season. however after my rebuild with a new grease seal i have gone back to gear oil as that is what the OEM called for and my seal is now funcional.
    Quote Originally Posted by jetboatperformance View Post
    the ensueing fire would likely be extinguished by the sinking however

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    Senior Member BrotherWolf's Avatar
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    Quote Originally Posted by Delemorte View Post
    I want to say the older boats used oil but the new ones use grease.. I could be wrong.. A pro will speak up im sure. I used grease before my rebuild, at the suggestion of a pro, as my seal was all jacked up and it seemed to work fine for a season. however after my rebuild with a new grease seal i have gone back to gear oil as that is what the OEM called for and my seal is now funcional.


    thats kinda what I was thinking is that the seal was bad and then they started pumping it up with grease???....not for sure...But I think Im going to clean it out and replace the seal etc and go with the oil.

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    Senior Member Delemorte's Avatar
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    Quote Originally Posted by BrotherWolf View Post
    thats kinda what I was thinking is that the seal was bad and then they started pumping it up with grease???....not for sure...But I think Im going to clean it out and replace the seal etc and go with the oil.

    and that grease seal is real easy to replace... good luck getting all the old grease out.. it took me a few cans of break cleaner and lots of patience.
    Quote Originally Posted by jetboatperformance View Post
    the ensueing fire would likely be extinguished by the sinking however

  15. #14
    Jet boat service
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    The only two jet drives that used gear oil for the tail bearings are the Berkeley and the Legend Jet drive. In my opinion oil is a much better lubricant in this case. The Berk bowl has a large cavity for the oil bath and in most cases the grease won't get to the bearings. If you pump too much grease into the bowl you can pop out the seal because it is not made for grease and has no ring clip holding it in place. Jets that use grease are designed for that purpose and have retaining clips and smaller bearing cavities. In my opinion the oil bath does a better job of displacing sand particles that my get into the bearing cavity and is also a much better lubricant when running on the trailer.. I believe that oil baths lube better than grease anyway. Jim

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