Miller trailblazer 250 onan motor starts but put in run wont run

Older model P220G onan motor. Just checked spark plug only gives fire in start position turn to run no fire on plug. Is it supose to have some ohms across the ignition coil it reads 6 ohms from hot side to ground side of coil but reads over 400ohms from hot side to ground chasis. Older model P220G onan motor. Just checked spark plug only gives fire in start position turn to run no fire on plug. Is it supose to have some ohms across the ignition coil it reads 6 ohms from hot side to ground side of coil but reads over 400ohms from hot side to ground chasis.

check what voltage coil in use
if it is a 12 volt /7.5 volts check for a circuit from the run position of the ignition switch to the coil( resistance wire or in wire resistor --ceramic resistor)
check for a circuit from the switch in run position any way and check for voltage at the coil end of the wire
if you have a spark in the start position , I doubt if it is a coil problem check what voltage coil in use if it is a 12 volt /7.5 volts check for a circuit from the run position of the ignition switch to the coil( resistance wire or in wire resistor --ceramic resistor) check for a circuit from the switch in run position any way and check for voltage at the coil end of the wire if you have a spark in the start position , I doubt if it is a coil problem

there will be 2 differences in ohms readings in a coil as there are 2 different circuits
one is from the battery to ground which is the primary winding of the coil ( transformer) with a limited number of windings
the second is the high voltage side with an large number of windings to increase the voltage from 12 volts to around 16,000 volts for the plug
As I said O suspect that it is not the coil but a circuit problem either in the switch or in the resistance if you have a duel voltage coil
( 12 volts to start and 7.5 volts running -through a resistor ) there will be 2 differences in ohms readings in a coil as there are 2 different circuits one is from the battery to ground which is the primary winding of the coil ( transformer) with a limited number of windings the second is the high voltage side with an large number of windings to increase the voltage from 12 volts to around 16,000 volts for the plug As I said O suspect that it is not the coil but a circuit problem either in the switch or in the resistance if you have a duel voltage coil ( 12 volts to start and 7.5 volts running -through a resistor )

Could the stator be bad. Voltage reads good on switch , voltage regulator. Could the stator be bad. Voltage reads good on switch , voltage regulator.

the stator is for the generator out put as is the voltage regulator and should have nothing to do with ignition
the engine is normally a separate identity to the generator side unless what you are talking about is not what is happening
to clarify it have you a battery for the engine or is the ignition from a magnet and coil at the flywheel
are there points and condenser in the ignition system the stator is for the generator out put as is the voltage regulator and should have nothing to do with ignition the engine is normally a separate identity to the generator side unless what you are talking about is not what is happening to clarify it have you a battery for the engine or is the ignition from a magnet and coil at the flywheel are there points and condenser in the ignition system

The reason I asked because the diagram shows it from start switch going to voltage regulator to stator to igniition coil. When I put on the switch on 12 volts for the starter and 12 volts goesto the voltage regulator. The switch 4 prong. The diagram shows the stator coil feeding back into the ignition coil. I looked and see wire from voltage regulator going to stator coil and wirecoming from stato coil back to ignition coil. The reason I asked because the diagram shows it from start switch going to voltage regulator to stator to igniition coil. When I put on the switch on 12 volts for the starter and 12 volts goesto the voltage regulator. The switch 4 prong. The diagram shows the stator coil feeding back into the ignition coil. I looked and see wire from voltage regulator going to stator coil and wirecoming from stato coil back to ignition coil.