Think I found the answer on another site..no adjustment but:
Using your Torx drive scrench, remove the two screws holding the oil tank on the saw. Rotate it forward and down to get it off the rubber nipple. Inside the rubber nipple there is a small round piece of screen to catch sawdust chunks. It will be plugged so pull it out and wipe it off. When reassembling, it is easier to put the rubber nipple and screen on the tank, then fitting it into place on the saw head.
This is a 2-3 minute maintenance item which needs to be done whenever the oiler quits working.