I have a 70 HP Mercury outboard. The year is either 1990 or 1987.<br />This morning I went to go for a boat ride and I wanted to tilt the motor down to start it, but there was no response on the toggle switch on the gear shift. It would let me tilt the motor up but not down. Where to I start to determine where the faulty part is.<br /><br />Also I undid the screw to the hydrolic fluid and I could not see any, but I did not put in anything to see where the fluid level was. How much hydrolic fluid should be in the chamber.<br /><br />Everything seemed to work OK last night when I docked.