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I have a 1993 EXT 550 EFI. I'm wondering what the voltage into the coil should be. I'm only getting around 2.5v is this normal or should it be higher?
 

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Voltage into your coils after the CDI? The coils on your stator are producing around 150VAC. They go into your CDI (capacitor discharge ignition) and the capacitor will store up that voltage and zap it out when the timing sensor says to, so that could be 1000's of volts. Then the coils with your spark plugs wires will multiply that voltage again to give your spark plugs somewhere between 5000 to 20000 volts I imagine.
 
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