I think my pump is leaking. I have a small amount of oil leaking from the burner fan housing on my Beckett 2-oil-line (hot water) burner. I checked the fittings and the gun assembly and cannot find anything else leaking. How likely is it, that the oil pump seal failed and is leaking oil into the fan housing? Over the summer, I've collected a couple of Tablespoons of oil. I do my own maintenance and repairs. I appreciate any advise on this. Thank you - Tom