Odd stator… How to.test?

[Beno]

I seem to be in possession of this old stator Mercury item see attached pic.

336-3962

This is different than any other stator or I’ve noticed because it only has one wire coming out of it.

it’s a thick wire and normally I would think well… to test this I must test continuity between the case and the wire.. and I get 0 ohms..

Does anyone know how to test this? I don’t see any of the logical way to test it.

It also seems you should call it a generator not a stator because there’s only one wire so it’s got to be 12 volts.. unless there’s some sort of CDI trickery going on?

 

[dave-bernard]

Phase maker ignition ?????????

[billw]

Mercury Thunderbolt. For some reason, the manual doesn’t call it “Phase Maker” until 1972, when the stator apparently went to a high and low speed wire, although the points still MAKE, to fire. I think it is a 336-3962A4, off a Merc 40, single cylinder. probably around 1970 or so. The one wire was supposed to be green but you can see the yellow butt splice, and we all know what happened to that vintage Mercury wiring. Poof! The green wire fed a bunch of jolts to the ignition coil plus side and the breaker points grounded the other side of the coil, to fire the plug.The points closed to fire, not open to fire like conventional magnetos. To test (as good as possible with an ohm meter, at least) Ohms setting on Rx1000 (high ohms) the plus meter lead to your now-black wire and negative meter lead to stator ground. Should have NO CONTINUITY, OL. Now, reverse the leads: Plus to the stator ground and negative to the black (green) stator lead. You should have 20K to 50K ohms.

Long live American manufacturing!

[Beno]

Oh my..  didn’t think of reversing the test leads..

One way diode in there???.

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