1983 150 Black Max

[yarb11]

I was wonder if any boat Mechanics could tell me how to service or change the grease in the lower unit of my 150?
I like to work on my on stuff and have never tried this. Thanks in advance. Yarb11

[boats.net]

Remove the upper (vent) and lower (drain) screws to drain. Refill by pumping oil in the bottom hole until it comes out the top hole and run a little extra out to get the air out.