Originally Posted by
vaggozer
the underside of the head button is black and the glow plug.the carb setting are all ok.when i change the settings the engine drys...(it has no fuel and has flameouts)can you help me ?
It's too rich if that's the colour of it.
I tune mine to an even golden brown colour. Even with this colour i found there to be slight carbon build up on the side of the piston and sleeve, but none on the button or plug.