Hi Grumpy, lead you astray abit, the flattened bit rubber on the insulator actualy sits to the outside of the hole so there is no problems with it. Have ran the mower with only the elbow attached and it was worse, now jumping at both idle and full revs. Tried just the gasket/insulator, had same problem...until i put my finger over the idle air bleed (red circle). Smoothed it out and ran perfeclty at both idle and full rev. Did cover over the other air bleed ( green circle ) made no difference.
Would it be worth attaching all peices again and trying to adjust the idle air bleed screw or will i be making it worse, or worse yet more fustrated. Or would you advise taking carby apart for another thorough clean and inspection.
