Bill Erickson wrote:

I just finished the restoration on my '30 101 and have been trying to get the oil pump to deliver the proper amount of oil.  I know you can count drips if you have the proper plug but instead I chose to just monitor the level of the oil in the crankcase.  I take it for a 15-20 minute run, put it on the center stand and pull the upper oil level screw in the crankcase.  Each time I removed the screw oil came running out, and quite a bit at that.  I would adjust the screw in (clock-wise) a bit, then take another 15-20 minute run and again check the oil level.  I finally got to the point where the screw is almost touching the nut that locks it.  I may have 1/16" left for adjustment.  With the screw in this position I managed to measure 1 oz of oil that came out of the hole after the ride.  Was certainly better than the earlier runs but nonetheless it still seems to me that if it was adjusted properly maybe a little bit of oil might come out, but not much.  The other thing I noticed was that if I left the oil level screw out for a day or two, oil would occasionally drip and create a small puddle on the floor.  I assume that oil must be seeping through the pump and into the crankcase when it is just sitting.  Is this behavior normal?  Or does it indicate that maybe the pump needs some type of rebuild?  For the record, I am using 50 wt oil.

Any advice greatly appreciated.

The original screw length i measured some time ago was 890 thou ..  Just for reference .  Make sure your hand pump tap  is  sealing or turned  off .     These  pumps are near 100 years old   and do bypass   ,Usually  when sitting resting in the shed  mine will gain quite a bit.    when running i set my pump slightly high and never touch the Hand pump    I do run an oil ring on the  Rear cylinder.