Every time I change the air filter top on my PP4620AVX, it is obvious that fine sawdust particles have made it past the filter (and most likely into the carburetor). The air filters are genuine Poulan products and I have even replaced the foam gasket that sticks to the Air Filter Bottom and seals against the Air Filter Top.
This can not be good for the life of the engine. Should I try sealing with some automotive RTV next?