How do i top up the lubricating oil in the hydraulics of a mercury outboard engine

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04 Oct, 2016

  • 67%
    Solved this issue
  • 87min
    Time to fix
  • 58%
    Recommend to DIY
Need a faster answer?
I suppose you mean the oil in the Trim system...

Lift the engine all the way up,
Place the jackstand to keep the engine fully up.
You'll see a plastic plug in the center cylinder.
Unscrew that plug. ( There can be some pressure, take care of your eyes!)
Fill with ATF-oil till the level is at the bottom of the plug hole.
Screw the plug back in.
Lower the engine.
Done!
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