I have found dirty pumps and filters to be my problems. Dirty due to sawdust getting into the bar oil tank while filling before cleaning or being careful. The PoulanÂs foam filters were easy to clean with the use of my Poulan manual. I could see the foam deteriorating if the saw is old enough. The saws with manual pumps and auto seems to work better because you can force oil through and prime the bar (when the pump is good and the filter is not too dirty). Some people will simply use a squirt can to add oil as needed or at least before good dia cut vs a bill on an old saw. One Logger told me he adds oils as if the oilier is not working period. Remember, some Craftsman are Poulan saws. Craftsman is only a brand vs a builder of a product. logger