removal of lower unit; long shaft extension kit

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Jeff Salinas

Cadet
Joined
Apr 28, 2008
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23
Hello everyone,

I'm going to be installing a mercury longshaft extension kit on my 2004 15HP outboard. I know I'm going to have to drop my lower unit, so does anyone have any advice, tips, or recomendations before I actually attempt this feat. Is there anything I should have before hand; grease, gear oil, loctite, or any special tools. I'm going to be winging this so I can use all the help I can get.

BTW, the reason I'm converting my shortshaft to a long shaft is my shortshaft outboard is too small for my inflatable tunnel which is rated for a shortshaft motor. The rep for my inflatable says that the newer lower HP Mercury outboards changed out their mounts that actually rides their motors 2 inches higher than their suppose to be. any truth to this?

Thanks,

Jeff
 

Diverdana

Recruit
Joined
Jul 11, 2020
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1
I purchased the Bay kit 108 for my 2003Mercury 15hp to extend the leg. I know this was a very old post, but I'd love a simple outline of steps that I can use and then refer to my manual.. I can't seem to find much. I assume I start with draining oil?
 
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