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  1. #1

    Default Mercury thunderbolt 500 output shaft oil seal change-help!

    Attempting to remove the cover to replace the output shaft oil seal (on bottom of engine)

    im having trouble removing the actual cover, it's come out about 15 mm but doesn't seem to want to move any further....

  2. #2

    Default Re: Mercury thunderbolt 500 output shaft oil seal change-help!


  3. #3
    Join Date
    Sep 2003
    Location
    New Tripoli, PA, USA!
    Posts
    15,190

    Default Re: Mercury thunderbolt 500 output shaft oil seal change-help!

    If you are talking about pulling the prop shaft out, use the propeller as a puller; stick and some plywood between the prop and the housing, and tighten the prop nut.

    Jeff

  4. #4

    Default Re: Mercury thunderbolt 500 output shaft oil seal change-help!

    Thanks for that jeff but I'm actually talking about the output shaft that goes into the bottom of the engine

  5. #5
    Join Date
    Sep 2003
    Location
    New Tripoli, PA, USA!
    Posts
    15,190

    Default Re: Mercury thunderbolt 500 output shaft oil seal change-help!

    That's the crankshaft.

    The lower bearing cap can be pulled down to remove the seals. You need to loosen the bolts holding the crankcase together and pull the cap down.

    Jeff

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