Yellow Spark

[fas2c]

Well, I have been trying to get the ole waggy into good running order and discovered that my spark is nice and YELLOW :confused: I've swapped plugs, cap, rotor, points, condenser, checked the wires, new coil (now running Jacob's Ultra coil) adjusted the timing.
Nothing has worked so far. Yeah, it runs a bit better w/ the new parts, but still weak spark :(
I think I read somewhere, here i think, that the coil resistor on the firewall might be the culprit.
Frankly I am confused, so any help will be appreciated.
fas2c

[Shane]

Maybe just run a hot wire to the coil from the battery and then check your spark. If it is good then you can trace down the resistor. I know it will be hotter with 12 volts but it may not, and this will lead you elsewhere.

Just a thought

Shane

[Lindel]

The Jacob's Ultra Coil will stand a straight 12 volts, with no problem. With the resistor wire, you're only feeding the coil with about 5 - 6 volts, max. Bump that up to 12v, and you'll get a much more powerful spark.

[reddog]

Just check the voltage at the coil with the ignition switch in the run position. 9-10 volts? Should be a hot spark. With the stock resistor circuit I run about 10 volts at the coil.

Kerry