I have a troy-bilt 5550 gen runs good but not putting out power,circuit breaker ok.

If its not putting out power... how did you confirm the circuit breaker is OK? Did you measure to see if it was getting power to the breaker? What I am saying is there is a lot of things it can be... and trying to see what you have already done.

The breaker did not pop out.

That doesn't mean its good. It only means its not tripped. Do you have a voltmeter? How much use has this had? A LOT or a little?