The coil on my carbed 1300 X is producing a pale yellow spark, so I think it's time for a replacement.
I have searched the archives here and read heaps about 12v/9v coil selection, but am still confused.
There is no ballast resistor on this spec car (well, I can't see one anywhere). This would lead me to believe I should be buying a 12v coil (Bosch GT40)
However, when I measure voltage at the positive coil terminal (ignition on, not cranking), I see 9v, which indicates I should be getting a 9v coil (Bosch GT40R).
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