Husqvarna stone saw popping and flames out of muffler?

[flanagaj]

I used my husqvarna stone saw yesterday and noticed that it was occasionally popping and I could see flames coming out the muffler.  I replaced the rings and fitted a new genuine carburettor at the same time.  Does anyone know what might be the issue or how to diagnose it?

[dpmiller]

is the oil/fuel ratio correct? What colour is the sparkplug?

[JohnMo]

1 hour ago, flanagaj said:

husqvarna

May have a winter summer switch, to change the carb settings. In winter it could be running really lean.

[crispy_wafer]

Unburnt fuel possibly, you changed the carb, are these preset at manufacture?  Is the old carb Knicknacked, if not I’d be tempted to pop it back on and see what happens 

[flanagaj]

4 minutes ago, crispy_wafer said:

Unburnt fuel possibly, you changed the carb, are these preset at manufacture?  Is the old carb Knicknacked, if not I’d be tempted to pop it back on and see what happens 

The carb was left on the manufacturer's settings.  The old carb is long gone.

[JohnMo]

Could also be old fuel. Unless new dump the fuel and our in new