How important is the chain Oiler? The primary cover screw hole boss was cracked and no longer allowing a screw to tighten. However I could remove the chain Oiler and run a longer screw with thread sealant to tighten the cover, losing the chain Oiler.
Not a good idea because it is also a breather for the primary .
There are drilled inspection caps or put a tube on the outlet and run it up to the oil tank or some where out of the way