So I've got a Mcculloch PM 610 that was found in a barn that blew down back in December. I've cleaned it up and replaced the usual items: seals, carb kit, fuel line, fuel filter, etc. It now runs good; but it doesn't oil. I followed the directions in the service manual to test the pump and the oil pump did not pass. Now I run into more trouble. The IPL I have shows the oiler assembly is part number 219380. That number does not come up much in online searches. There are oilers that show up in searches, with different part numbers, that appear to fit this model saw. I'm looking at purchasing an oiler with part number 219991, all the holes looks like it will line up but I am not sure yet. Can anyone confirm this or what different oil pumps will fit correctly? I appreciate the help.