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Onan P220G engine? Do you have 12 volts to the positive side of the coil with the key on? Or try a wire direct from the battery posiitve post to the coils positive side.
Is there a condenser at the coil? And has it been replaced?
Wired like this?
Did you see the coil wiring diagram from manual link? Manual shows condenser, on the ignition wire terminal. And is this the positive side of coil? Orange wire? And have you tried it with a jumper wire to coil?
OK, have you tried a direct jumper from the battery to the coil positive?
Remove wire from ignition switch terminal , and attach jumper in it's place on the coil. The check for spark or see if it runs.
At the coil! power to the coil.
I want to eliminate everything but the ignition components.
Try the old coil.
I have always used condenser, never tried it without.
Yes, bypassing all the safeties and the ignition switch and wiring.
With everything bypassed, all you have is the trigger coil and the ignition module/coil. I think I would get a condenser and try it.
With voltmeter, what is voltage at the coil while cranking? What does it show when you turn key off? As it sparks just as key is turned off.??
Isn't this a 12 volt system?
Why does coil not have 12 volts to it?
Where is voltage lost?
Charge the battery and recheck,it's not going to work on 6 volts.
Let me know.
7.5 at coil? Fully charged battery would be over 13 volts.
Wire coming direct from key switch?
Why such a voltage loss?
Check the same wire at the keyswitch. If it has battery voltage, replace the wire from key to coil.