You mentioned going to O’Reilly for the correct solenoid. They carry, or can get for you, an aftermarket one by Sierra Marine, but they may call it an O’Reilly. Same for NAPA auto parts. The part number at both places is 18-5807. Same number for Sierra online at marine places like iboats.com. The ones for Ford cars in the late 1950s, and most 1960s look the same but aren’t and you will fry some wires if you directly replace with one of those. Here’s a link to the Oreilly part:
https://www.oreillyauto.com/search?q=18-5807
Dave
