Tried turning the regulator adjustment screw in 1/2 turn & turned it over with an electric starter for 10 - 15 seconds & still not holding pressure. Doing this with an empty tank as I don't want fuel all over my work table. Turned it in another 1/2 turn with the same results. Turned it in 2 turns & now shows signs of improvement. Can now get a good hissing sound when releasing the tank pressure. At this setting it's 3 - 4 turns in from flush with the regulator housing. Will try it with the tank fueled up tomorrow after work & hope it's not leaking fuel through the carb, If this goes well I'll have to wait till weekend to start her up & adjust the regulator.