Does the engine make a beep when you turn the key like it normally would? I had the exact thing happen to mine, engine did nothing tilt/trim would not work. It IS a fuse. There is a small fuse block capsule on the drivers side of the motor pull the cover off, and you will see 4 fuses in there i think it is one 5 amp and three 20 amp fuses, pull the 20 amp fuses, mine was the ignition circuit fuse, (lower right 20 amp) and it was blown. I now carry spare 20 and 5 amp fuses. That is the only thing I know for a fact that will kill all power to the motor. Guess I should have read all the post where you got it going… but still its a good idea to carry those fuses as spares