These matchsticks indicate the holes that'll need to be filled with epoxy (we used a two-part pliable type that could be blended and formed like modeling clay). The pen tip points to a channel that feeds the power valve, and therefore should not be plugged.  The ported vacuum orifice for the distributor advance (at pen point) and the vacuum feed for the choke get sealed as well.  The wood-gas inlet pipe should be carefully fitted and fastened to the carb body with epoxy. When that's done, check again to make sure the power valve feed channel isn't plugged.
MOTHER EARTH NEWS Staff