Poulan 3400 Chainsaw

[Arbo]

My father bought this saw new about 25 to 30 years ago. I don't use it much, but it cuts some firewood for me. Recently, the bar oiler has not been working correctly...if at all. The oil is going somewhere, but I don't think it is making it to the bar. If I let the saw sit on the garage floor for a few days with oil in it, all of the oil will be in a puddle on the floor. Where should I start looking for the problem. I'm guessing a cracked hose somewhere, but don't know where to start. I did replace the fuel line about two years ago, as it whas brittle and broken off. Any help would be appreciated.