1994 Force / Mercury SportJet Jet Drive oil Change

DaveyLC

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Jun 26, 2024
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Hi, I have a 1994 90ho Force/Mercury sport jet (in-board) and I'm struggling to change the jet drive oil.

I have located the drain plug but I can't locate a fill/vent plug, there is a threaded plug with a female hex that I think might be the vent/fill but it looks like got red loctite on it which makes me think its for something else.

Does anyone know please how to change the oil in these old SportJet Jet drives?

Thanks!
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