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Old 10-28-2020, 08:52 PM   #13
G.M.
Senior Member
 
Join Date: May 2010
Location: Florida and Penna.
Posts: 4,471
Default Re: 2.5 ohm ignition resistor

The resister is used to cut the 6.3 volts from the battery down
to minimum of 3.5 and max of 4.0 volts. This reduces the arc
at the points. The higher the voltage the bigger the arc. If you
get below 3.0 volts when you push the starter button the amp
draw from the starter pulls the coil voltage to low to make a
strong enough spark to fire. It will be a fuzzy little yellow ball.
G.M.
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