Outdoor Power Equipment and Small Engines - Homelite XL chainsaw oiler problems

My old Homelite XL chainsaw is not using sufficient chain oil. I always use Oregon oil and have stripped the oil tank tube and cleaned them but it is still not using enough and overheats drastically stopping after one half cut log.

Where is the oil slot hole on these models have searched the net to no avail. Also is there an adjuster for the oil flow please?

It is the middle of the night here so will only be able to take suggested actions tomorrow!

On the XL model series units the oiler is actuated by way of crankcase pressure. You will have a fitting on the crankcase (in the vicinity of the carburetor) which in turn goes to the oil reservoir and pressurizes the tank. There is a small duckbill valve pressed into the tank that allows air pressure in but not out. This pressure feeds oil to the bar. There are two rubber lines involved to move the air from the engine and oil to the bar. This is a very lousy set-up and is notorious for failure. Areas to check are: duckbill valve, oil tank cap (if it leaks it won't seal and not pressurize the tank), supply and feed lines colapsed/plugged or in a worst case a leakage of the intake system whereas it can't possibly create the needed pressure due to crankcase leakage (seal(s), gasket(s), etc. related to the crankcase).