Can't get fire to plugs

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not yet, I was told to check the CB4, self set breaker???

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My model number is 903039

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model JK641540

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Its the Onan, can it be a failed CB4 switch?

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I verified it isn't a fuel problem. I read somewhere to verify voltage from the CB4 to the start Throttle solenoid. I did and I get 12 volts in the on position but goes to none in the start/ run position....

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Miller Legend AEAD 200LE, S/N JK641540 won't start. I checked the start/throttle solenoid (good), Oil pressure switch (good) still no fire. What next? Can any one help me to move forward?