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    Replacing Lower Drive Shaft Seals in Upper Housing of Mercruiser Alpha 1

    I just removed the lower unit from a friend's 1986 Alpha One stern drive (2.5 L) to find that the o-ring that fits on the top of drive shaft remained in the upper housing. I looked up in the housing to see not only the o-ring but also the remains of a spring loaded rubber oil seal.<br /><br...
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    1986 Mercruiser Alpha One Lower Unit Removal/Stuck

    Hello,<br />I am trying to help a friend change the raw water pump (impeller) in his 1986 Mercruiser Alpha One Stern Drive with a GM 2.5L. I have worked on older outboards for a while but this is my first Stern Drive. I have put the drive in forward gear, removed the front bolt, loosened the...
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