I have an older Hunter
33 with a Yanmar 2QM20
(original equipment) installed. The engine control panel
in the cockpit
is in a particularly poor location, situated so that the helmsman is almost certain to step on the key when it is in the ignition switch during rough patches or when wiggling past the wheel
to get to the helm
station. And this is in fact what has apparently happened frequently over the years, as the key has been repeatedly bent and straightened and now, finally, broken entirely. Yanmar
doesn't even make replacement keys anymore and at any rate replacing the key wouldn't address the root problem. So, I have resolved to replace the key ignition with a pushbutton ignition switch, with a safety
cover, and with the circuit controlled from below deck
(which will prevent any random passerby from firing the boat up and motoring off).
I'm unclear on the wiring
setup however. The key switch has three wires to the back, presumably for -12/on/start. A two-pole momentary pushbutton for the ground/start wires will serve to start the thing, but I am unsure how I need to wire it so that the "on" position will work. I have tried connecting the -12/non-start wire, but the panel lights do not come on as I would expect. My thinking is that I would like to put a switch below to turn the ignition "on" and enable the start switch in the cockpit
, but I am unsure how to set it up.
I am sure I am badly misunderstanding how all this is supposed to fit together, so I am hoping someone can give me a quick primer on ignition system wiring
before I start tearing things apart. Any input appreciated!