Up/Down work fine. The trim holds when motor is in up position for
long periods of time.

When down and going into reverse the motor pulls up. Light reverse is
fine. Its when your throttling up in reverse a bit that the motor pops
up.

I looked for any kind of Run/Tilt lever at the back of the boat. But I
think that is for manual tilts. This is all power trim. I suspect I
could have a loose line? Air in it? Weak Cylinder? If you do have to
bleed these things off how do you do that? (Is it like a brake
system?)


Motor is a 1973 Johnson 115 v4

Heres a photo if it helps jog a memory:
http://4.7.36.200/73johnson.jpg

Thanks
Nate