Prop on 1977 beach-craft boat won't go up or down.?

Question

I own a 1977 beach-craft boat and the prop won't go up or down. I have bi-passed the reverse relay to get it to work before and now it won't work at all. Could it be a hydraulic problem or any answers would help.

Answer 1

Not enough information.  Is this an outboard or a stern drive?  Also, need the manufacturer eg Johnson, Mercury, OMC,etc.