I have 1994 Mercruiser Alpha 1 Gen II/ motors that have been replaced at least a couple of times. The latest motors, 5.7 Chevys both have electric fuel pumps and the pumps appear to be automotive with jury rigged wiring. I am trying to make a safe as possible. I have read other posts explaining how I should run a hot wire from ignition source (starter relay or alternator EXC) and a parallel wire to oil pressure switch so after initial start up, the 12 vts going to oil pressure switch would maintain power to the fuel pump. While running, if motor stalls and I lose oil pressure, the switch forces current to ground. However, there is a problem. I assume the oil pressure switches described in other posts are three spade configuration. My boat has audio alarms connected to temperature and oil pressure switches. My oil and temperature switches have one threaded post each. Can I get these oil pressure switches to work for both safety and send audio alarm????? I don't see how? It seems to me that parrel wiring up this on single post switch would be a potential fire hazzard or at least blow fuze if current goes to ground??????