hello everyone. recently i purchased a stihl 036 pro from a friend to the sum of $100. it starts with no issues and looked to be good to go. however i noticed after starting it that it didnt seem to be oiling like ive seen other saws do in the past. i noticed after letting it idle that oil was coming out from the bottom of the saw and only a small amount of oil was getting to the chain. that being said, what would be the most likely cause of said issue? and what is the best course of action i should take in solving the problem. i have worked on saws in the past but not to the extent of this. any advice is greatly appreciated.