I just adjusted mine for the first time at 490 hours. Mine looked like a 5 year old boy peeing off the side of the boat. I cut off the safety wiring, broke free the jam nut, turned the adjusting nut one full turn. Then tightened it all up. Now it is sweet. I put back the safety wiring but I am not really sure I need it.
My Sanger dealer/shop told me 10 drops per minute.
Art did you remove/replace the safety wire?