Trim motor limiter

I have an 82' skeeter with a 1982 mercury 150hp on it and I was wondering if there is some way to set a limit on the trim for it. As it is now, it will trim all the way up until it binds itself against the splash well,
And it will trim all the way down, until it hits the bottom of the boat. How do I set a distance limit on it? It would be nice for me to be able to trim down to a low setting to get "out of the hole" during takeoff without having to look back at the motor to see where the motor is lined up......of course my trim gauge doesn't work either. Can somebody please help me with this?