Pat Norman
New member
Well my GX670 just started backfiring on cold startup, then runs rough a few seconds before smoothing out. Any suggestions what might be the problem? Never done this before.
+1Sounds like it is flooding. Running rich on start-up and runs good after burning off excess fuel? You may have build-up in your gas tank and in your float valve. When you turn off the engine always turn off the gas. If this fixes the problem then Float valve is getting stuck intermittently. My guess is it's from the ethanol causing corrosion in the fuel system. Could be something else though.