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  1. #1

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    Oil sending unit won't stay sealed

    Hi all I have a 2000 I think polaris the darn oil sending unit won't stay sealed and oil spills into hull. Seem to happen mostly during towing and hard riding. I've tried gasket making stuff. 2 part epoxy. Has anyone come up with a fix for this? Was thinking about wedging a piece of wood on top of it.


  2. #2
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    A 15/16" ID o ring on the sender and a hose clamp around the neck of the tank. You need a thin band hose clamp though.

    Click image for larger version. 

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    Last edited by Mr. Matrix; 06-28-2013 at 04:47 PM. Reason: Added picture

  3. #3
    Click avatar for tech links/info, donation request K447's Avatar
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    Quote Originally Posted by bobr277 View Post
    Hi all I have a 2000 I think ...
    What model do you have?

    The model year will be the last two digits from the HIN number plate on the rear deck.

  4. #4
    Tjdriver's Avatar
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    I'm having the same trouble on both my skis. I cleaned the interior of the neck and the sending unit and put rtv on it. It holds for a few months then I have to do it again. One of the skis had a hose clamp on the neck when I purchased it, but that wasn't working.

  5. #5
    Click avatar for tech links/info, donation request K447's Avatar
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    Hose clamp must be a narrow band design or it won't do the trick.

    And even then it may need a thin o ring or rubber band to fill the internal gap between rubber plug and the neck opening
    Last edited by K447; 06-28-2013 at 04:01 PM.

  6. #6
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    I have the tank out of the ski right now, since the motor is blown up and being rebuilt. I cut the wires to the sender and will be installing a weatherpack connector inline. This allowed me to work on the tank out of the ski. I didnt get it to seal without the o ring. I put the o ring in place, not only to help with the sealing, but to act as a spacer to get the sender a little higher out of the hole to allow the hose clamp to be tightened without coming near the wires for the sender. I have tipped the tank upside down and not a drop was seen. I think it finally fixed my problem that I have been having since I put the ski together last year.

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