I've got a lawnmower engine on a hovercraft and I'd like to power the headlight on it without a battery. I understand there isn't an "alternator" per se in these engines, but there's a magneto that provides power to the ignition coil so that the distributor points can create a spark. I vaguely remember reading about harvesting power from the magneto to power (very small) accessories, but I can't find the source.
Is it feasible to pull power from the engine as a source? The LED headlight I have pulls less than an amp, and has its own internal regulators and driver, so the noisy power should not be an issue (it can tolerate up to 40v, I can't imagine the magneto is more than 10-12 volts on the low voltage side.
As an aside - it seems some snowblower engines come with an alternator equipped - I'm not sure if it's just the wiring harness that's not broken out, or if there's actually a part missing. On the off chance someone has been inside one of these:
- The lift motor is a briggs vertical shaft 6HP engine, I can't find specifics on the exact model because it's been rebranded and the stickers have long gone.
- The thrust engine is a briggs 1650 (which seems to sometimes come with an alternator), however the engine I have does not seem to be specced with the alternator feature.