I was wondering if anybody can tell me the operating fundimentals of the automatic oiling system of a remington sl-11/65cc saw.It seems that the problem lies in the fitting attaching to the oil tank and connecting the line going to the cylinder.It seems that this fitting should work as a check valve.ButI have opened it up,there's nothing in it except for a filter-screen.From the screen(1/4")the inside of the fitting tapers down to about(1/8")in the space of about 3/8 of an inch.can someone tell me if something is missing?I purchased it after it was sitting for a while.It starts easy,runs well,but developed severe smoking problem after about 2 tanks of fuel.the smoking then turned into a oiling problem.When shut off the oil backs into the cylinder locking it up.I can then clean the cyl. out but it just does it again.I really want to keep the saw but it seems that nobody has the answer that i am looking for.I'd be thankful for any ideas even modifications that will get me going again.