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  1. #1

    Question Mercruiser Alpha one Gen one upper half bearing play

    Hello,

    Iím repairing an a1 g1 sterndrive. The bearing under the top cover was donating bits of metal to the rest of the upper. So kind.
    Anyways Iíve remove the prop shaft and bearings and they all look in good shape. However the lower roller bearing on the vertical shaft has a lot of play. Is this normal? Iíve linked a YouTube video showing the play in the bearing. I appreciate any comments you may have about the condition of this bearing.

    thanks!

    Jason

    http://youtu.be/QkS-m8fLN9I

  2. #2

    Default Re: Mercruiser Alpha one Gen one upper half bearing play

    I’d replace it. The marks on the rollers do not look great

  3. #3

    Default Re: Mercruiser Alpha one Gen one upper half bearing play

    Quote Originally Posted by Dieter View Post
    Iíd replace it. The marks on the rollers do not look great
    Thanks! I assumed as much. Iíve already ordered the bearing. At this point, Iíve got the thing apart I might as well put as much new in as I can.

  4. #4
    Join Date
    Jul 2008
    Location
    Northboro, Ma, USA
    Posts
    5,571

    Default Re: Mercruiser Alpha one Gen one upper half bearing play

    The play you have is normal, the rollors are held by the cage but the cage floats free. A new bearing may not show as much play but there still will be play.
    As this is a gen 1 the wear as seen is normal.
    The rollors typically look grey and used.

    Its never a bad idea to do bearing replacement especially when metal particles has been getting into gear oil through out the drive.
    Jack
    Mass.

  5. #5
    Join Date
    Sep 2008
    Location
    Maryland - USA
    Posts
    8,516

    Default Re: Mercruiser Alpha one Gen one upper half bearing play

    And make sure the new bearings get shimmed properly....

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