I have an 036 Pro that we have been using for several years now. I moved it in the shed yesterday and noticed a large puddle of bar oil under it. I moved the saw and this time laid it over on its side. I checked it today, and there is another puddle. Looks like it is leaking out where it would normally be pumped onto the chain. How do these bar oilers work? Could something be stuck open allowing the tank to drain out? I really dont want to take it to the dealer....Thanks