The coil in these seem to hold up. Care must be taken not to break the bakelite insulators. They can swell up a little over time and may not want to come out. This is how I replaced the plug wires. Carburetor substitute come from later Neptune’s. They show up on eBay from time to time. Can’t find the number just now. Have to go look on a motor. https://youtu.be/XPXjFZcMOl8?si=R0xTpRvtfepjK1uJ
A "Boathouse Repair" is one thats done without having tools or the skills to do it properly.