This is brilliant!!! Thanks heaps - do you also have the wiring diagram for the tilt/trim pump for the same engine? I have a 1983 50hp too and the tilt trim was all pulled apart by the previous owner. I'd be grateful if you could help!
Anyone have any guidance on what happens on the other side of that connector? I just got an old 45-50 (595XXXX SN), and it has no ignition switch... just wires. Trying to make heads or tails out of which is which, what needs power to run, and which one I short to trip over the starter, which one (if any of these) is the choke control, etc.
If your wire colors match, then red is +12VDC; black is ground; blk/yellow is ign killer; yellow/black is choke solenoid; purple is power from ign switch; grey is tach signal; yellow/red is starter solenoid;
An ign switch will normally have terminals marked B, M, M, C, I, and S. Red goes to B; black goes to M; black/yellow to the other M; yellow/black to C; yellow/red to S and purple goes to I. The grey wire is routed directly to the tach signal connection.
Remember the ign is powered by the coils under the flywheel. It does not need any battery power to function, and battery power to the ign system can cause serious damage,
