My father-in-law gave me his 4-Winns boat with 75 HP Mercury OB but couldn't find the key. It has a Quicksilver remote control panel and I've taken it apart but don't want to mess up the thing too badly. I hotwired the ignition and am able to get the engine started but I don't want to burn anything out doing this. I don't see any serial numbers or other markings of any kind ... any suggestions on how to get a new key or other ways to get more out of my boating weekends?