"RB" wrote in message
...
'77 Johnson 115hp.

How do I set the trim tab vane on the lower unit?
It's easy to physically loosen, set, and tighten. However, what I'm asking
is where to set it, how to know if it's the right setting, etc. I seem to
remember it's some kind of trial and error thing, but I don't know what to
look for. Please give me a quick crash course in the care and feeding of
that thingee.



Just center the torque tab and run at cruising speed to see which way the
boat wants to track.

If it tracks to the port side adjust it in small increments counter
clockwise (looking from above) until the boat tracks straight (or clockwise
if it wants to track towards starboard). Make sure you adjust in small
increments, it usually doesn't take much.