Re: Changing Bellows on a Mercruiser
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I believe a Mercruiser I/O unit that old is harder to replace the bellows, as they have power trim hoses with long, compound bend metal fittings that have to be snaked down and screwed into the transom unit. All I say is be careful when you screw in the hose fittings, as they're very easy to strip out. (I say this from experience. I've also had a bellows leak and sink my boat)
Bellows repair is not very difficult, but getting the hose clamps tight (and to hold) is often very difficult due to a lack of room. Mercury didn't engineer any lip where the bellows are clamped, so bellows are just so quick to slide off when flexed. The Mercury bellows cement is very slimy stuff--and it's required to do the job. I personally have not had good luck changing bellows, and would be taking it to a professional that replaces them all the time.
