Willard, I'm experiencing a problem with my power tilt and trim. It is the standard tilt and trim evenrude used on, I believe, it's 60 HP thru 85HP motors during the 70's and 80's. The tilt and trim works like it is supposed to (great, huh) but I can't get two brand new trim guages to work. Think the problem is in the sending unit located in the port cylinder. I took the sending unit out, and a spring and steel ball fell out - have no idea where the went except in the hole located in the cylinder. Do you have access to an exploded schematic showing how the componets fit in side the cylinder, or have other ideas why the trim guage don't work? Or perhaps, know how to test the sending unit to see if it is bad.