Lo & behold, spark at .060" excellent. I presume I was in too light an environment, or checking by myself holding plug on frame, and had poor contact; sorry about that! I do not see any gap between tapper and shaft of valve, but I suppose tappet will not move beyond contact with valve unless pushed down onto cam by ? A screwdriver ? The feeler gauge. Gap for inlet should be between .002" & ..005". These feeler gauges seen very flimsy. Should I just try to push them between valve and tappet?
