RE: G20 spark plug gaps.
The manual that came with my G20EI does not list the gap. I found it in the Tony Clark instructions on his web site:
"The ZG 20 is supplied with a Champion Y82. Correct gap is 0,5 mm. Use no other type of
plug. The NGK CM6 may look similar from the outside but is completely diļ¬erent!!!"
Brian