What’s the voltage drop test that I haven’t done. Where else am I checking it? Is there something between the ignition switch and the coil? I was assuming it was the same purple wire between ignition switch and coil which was telling me the switch
Voltage drop test is measuring the voltage on either side of a connection when it's under load. With your meter on DCV, you probe each side of the connection. The voltage should be close to zero. If it's higher than that it means there's significant resistance across the connection, either because of the component (eg ignition switch), bad connections, or bad wire. You can also do it on the ground side of the circuit, and you can test larger sections/multiple connections first and narrow it down if there's a drop. Keep in mind that your voltage drop is not necessarily because of a positive connection. Aside from grounds (helm, cannon plug, main ground), positive connections that I can think of off hand:
1. Battery to starter
2. Starter to circuit breaker/across breaker
3. Breaker to cannon plug
4. Dead man switch
5. IGNITION FUSE (esp if you have the glass fuses)
6. Ignition switch
EDIT: Also, since you have an electric fuel pump, and this is during cranking, you could also potentially have problems with the yellow/red wire (if it's tripping the starter though, it would have to be either at or past the slave solenoid) or the purple/yel wire from the starter across the oil pressure switch. Note that some of these connections are more likely culprits than others...
