I have a 1980 Searay Mercruiser. I replaced the starter, but when I went to plug in either the S or F wire on the solenoid, I couldn't find the wire. i plugged the battery wire and the other wire on the solenoid and it started. I drove it around for a day and the next day It wouldn't start or even turn over. I tapped the starter with pliers and it turns over from there, but still won't start as if the key is still turned off. What could it be and where did that wire go to?