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It’s a black plug, not the red one from later years. It’s 5 pin, I believe, as there are 5 wires for the ignition and choke switch. NLA Marine had one recently but sold it before I saw it: https://www.nlamarine.com/products/johnson-evinrude-0383328-33hp-40hp-wiring-harness-outboard-black-plug-69-73?variant=7899039858718
I’d love to find one like that, so if anyone has one, let me know and I’ll snag it. Otherwise, I haven’t seen one on ebay or my local marinas, or anywhere else online.
But I’m also considering bypassing the harness and wiring straight to the ignition like I mentioned before. It’s only 5 wires, plus the 2 for the battery terminals. It doesn’t seem *that* crazy, but maybe I’m wrong?