I have a 79' mercury 850 and well here is my problem. When I bought it they said the solenoid was bad so I purchased a new solenoid, no big deal like 12 bucks. I put the solenoid in and the ignition will still not work. If i jump it across the solenoid with a screwdriver(old school style) she will start like a top. So I figured the ignition was bad but when I put the tester on the ignition wire post on the solenoid it is getting a charge when I crank the key and the other side is grounded well. The key has to be on the run position before it will start and won't start with the key off so I can only assume the ignition is functioning. So I guess my question is has anyone else had this problem or anyone know what it might be. The only thing left that I can possibly think of is that it's not the exact solenoid for the motor but it's a ford model same voltage size and positioning only thing different is the mounting.