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Faulty Voltage Regulator?

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or bad resistor

10-28-2000 11:39:02

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i believe that the voltage regulator on my 41 9n with 6v system may be faulty. For a while it has not been charging properly, and it burns points quickly. Today i took out my multimeter and it showed 6.2 v between the top of the coil and the frame. I also tried disconnecting the generator negative post and then checking amps between generator and frame while cranking the engine. i'm not very good with the multimeter so i'm not sure what it was reading. it said 145 in the 200ma setting. i also tried taking off the fan belt and running the generator as a motor which worked. i also measured with the multimeter between generator and voltage regulator while cranking and got 140. is my voltage regulator at fault or another component?

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Claus

10-28-2000 12:19:48

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Re: faulty Voltage Regulator? in reply to or bad resistor?, 10-28-2000 11:39:02

The 9N/2N does not have a voltage regulator, unless someone modified the system. Trying to read amperage on the 200 MA scale of any DMM will burn out the 2 amp fuse in the meter when hooked up on a running generator output to ground... You were lucky you were just cranking the engine and the cutout relay was still closed. The fact that the generator motors is a good sign. As Dell pointed out the 6.2 volts on top of the coil is ok with the points open is ok... When they are closed and you still have 6.2 volts on top of the coil you have a bypassed ballast as Dell pointed out..
Happy Motoring
Claus

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Dell (WA)

10-28-2000 11:56:22

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Re: faulty Voltage Regulator? in reply to or bad resistor?, 10-28-2000 11:39:02

Electronics 101..... . Frontmount ignition coils must read about 3.5 volts (3 min, 4.5 max) with the points closed, battery voltage with the points open. Any other voltages will give you sparky problems. Including burning your points.

From your description, I suspect the "infamous ballast resistor" has been "by-passed".

Mis-guided mechanics often bypass the ballast resistor, incorrectly thinking that it will make starting eazier by providing a "hotter spark".

Yep, thats true, and bypassing the ballast resistor will also burn the ignition points and melt the insulative tar inside the frontmount ignition coil and short out the turns and all of a sudden you don't have any sparkies at all. DON'T BYPASS the ignition coil!!!

I'm not qualified enuff to pass judgement on any "generator problems". None of your measurements make any sense to me. I flunked mindreading, just ask my ex-wife..... ...Dell

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