McCulloch used genuine wool felt for those; wool will absorb water and pass the fuel. There was an advertisement showing someone pouring soda pop and sawdust into the fuel tank with the caption "don't try this with any other saw".
Mark
Mark, there is an old dealer up here that used to do just that at tractor shows and demos...they would dump out the gas and pour Coke in...he still remembers vividly the look on peoples faces
-Andy