Re: Magneto vs. battery ignition

Posted by captaink on February 21, 2006 at 07:00:44 from (66.115.214.56):

In Reply to: Magneto vs. battery ignition posted by EH in KS on February 20, 2006 at 19:44:53:

I’m going to tie some of the other posts together for you.

The H was originally 6 volt, positive grounded electrical system. It sounds like yours has been converted to a 12 volt negative ground system and probably an alternator. When the conversion is done either the coil needs to be changed to one rated to work on a 12 volt system, or a ballast resistor has to be installed between the switch and the coil. This lowers the voltage to the coil to about 6 volts and is done to prevent the points from “burning out” very prematurely.

If the conversion is wired right, the points should last at the very least a year (unless you run it 24/7-52 then they might only last half a year. You can convert to a magneto which is self contained, then the voltage and polarity will not affect the ignition system. Magnetos are dependable, but have an impulse in them to retard the spark for starting, especially hand cranking. Many converted away from them to the battery distributor because “kicking” (the engine spinning backwards from too early a spark) was less frequent with the distributor than with the mag.

You probably have more questions now, feel free to post them, someone will answer them for you.

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