You just raised your 60 hp motor to the top and it will not go back down?

Check your fuse first, then the trim switch.

Assuming the Up trim still works correctly, I would suspect a failure (in this order) of the down trim solenoid, the trim switch, or the trim motor. If your outboard has more than one trim switch (most newer ones have one at the helm and one on the outside of the motor cowling), try the other switch. If it works, suspect a bad switch. There are two identical solenoids that control the up/down trim motor. If the outboard only trims in one direction, switch the two solenoids and see if the outboard will now only trim in the opposite direction. If so, one of the solenoids is defective. Note: These tend to fail in pairs. If you have to replace one, I recommend replacing them both at the same time.

To test the trim motor, take your outboard to a certified marine mechanic.