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1989 Mercury 115 2 stroke Power Trim filling question

Orr84

New member
Hey everyone,

I have a 1989 115 4 cylinder 2 stroke and I am trying to find the proper Power Trim Fluid drain/fill procedure. I have a pdf manual but everyone example shows a fill plug at the bottom of the trim motor. On my merc, there is a visible fill tube port side with a big screw.

So far I am assuming the fill plug holds pressure… slowly release pressure with trim all the way up (leg supported) and suck out the old fluid and fill until where?

Cheers and thanks for your Help in advance!
 
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