On our pontoon motor when reversing we get kick back up with the 115
Johnson (1973 model). Seems the trim would not hold it down in
reverse. After taking it out of the water yesterday and looking it
over.. WALLAH! Only one tilt/trim cyl is live and hooked up. The other
is just dead and no hydro line to it. We have a parts motor and it has
two good live cylinders. I am going to pull off a line and good
cylinder off the parts motor and put it on the boat.

Doing this what do I need to check? I may need to add fluid yes? What
about air in the system? How do I get that out or bleed it out? This
is an OEM Johnson T/T setup. I am thinking if I push the new cylinder
to the bottom position, then hook the line up and push it up before
installing I can eliminate some air?

Any advice appreciated.