Re: 1957 Big Twin 1956 wiring harness

[frankr]

Should be doable. I’d think you can just hard wire the ’56 into the ’57 the same way it was on the ’56. Or if you want to spend some $$, the ’57 cable & plug is available from nymarine.ca

You might want to keep in mind the ’56 was a 6 volt system, so you will have to change the starting solenoid to a 12V one. Use an OMC solenoid, not a car solenoid so you dont destroy the safety switch.