I have an old 1987 3.0 alpha one with breaker point ignition. There is no 90 amp fuse on the starter. The parts book shows the fuse, however the wiring diagram from Mercruiser shows nothing of it at all. I understand it will protect the orange wire between the starter and alternator and the short end of red wire that goes to the circuit breaker in the event of a short circuit. So my question is, should I add it for extra safety or forget about it since the wiring diagram doesn't show it? I've also read that at different times both the red and orange wires were connected to the fuse and at other times they came with only the orange connected. What's best practice here. I'll attach the pertinent part of the wiring diagram for reference.
