Thank you previously for the many ideas on how to check and test, l have done all of those and put the meter on just now,10 volts only at reasonably high revs... the globe glows, but not anywhere near as bright as the two other T's.
wire inside ??I don't know, but its about to come out for a good look see and check.
Why take it out David? Leave it in there until you need to do something major, unless you have other plans.
Before you pull the engine you might like to try my E timer for awhile??? Just check that the mag coil is not unwinding itself anywhere first! The E Timer is a good solution for running on battery with excellent performance. It is here if you want to try it!
You should be able to do an in - car recharge with the symptoms you describe David.
All you need is three 12V batteries and two pair of jumper cables.
Sorry to admit, but the same event happened to our '26. Found a bearing shim jammed between the mag coil frame that cut into the winding insulation that shorted part of the magneto..... that was before the engine rebuild.
Most likely there is some debris at the magneto post. Check, clean, reinstall, take readings.... may have to do recharge procedure.
Wouldn't hurt to take advantage of Warwick's offer either.
If it happened all of a sudden, my money is on one of the field coils being grounded. It is still generating electricity on the portion of the circuit between the grounded coil and the mag post, but the portion between the grounded coil and the intended ground is not contributing. Those who know more than I can verify, but assuming the relationship is linear, I'm betting your ground is in the neighborhood of the 5th or 6th coil from the mag post.
Warwick, OK l will try the E timer, l would prefer the mag working properly, but as an interim measure, why not.
My guess is that l will know within minutes if it works significantly better.
Although its a band aid to the real problem, which l have yet to locate.
Please keep us updated on your progress. Thanks !!
So why not just run the coils on a 12 volt battery? Even a small motorcycle one will give you many miles. If it has a 6 volt system, you know that it will go and drive running on 6 volts.