What kind of regulator,vaporizor and carb. do you have? Adjustment proceedures for bendix and zenith are not the same.
Are there 2 ear **** looking pieces on the regulator. The bendix regulator in the vaporizer mounted in the water outlet, sometimes has an adjustment most new vaporizors do not. The earmuff type secondary regulator needs special tools to set up.
If you have earmuff type. Remove hose from carb. see how much if any lp comes out with hose in cup of water. should not quite bubble!!
loosen screws on each side of regulator. unscrew ears. reeds in regulator are set approx. same depth as the threads on ears plus the button depressed. about.375, tighten screw against reed. do both sides. turn on lp. stick hose in water if bubbles. reeds not depressed enough. Have you confused yet? Much easieer with proper tools.
Regulator operated with engine vaccume on ears and buttons pressing reeds pulling open valve. Thats old school. Usually only a spud in carb to inject LP. Primary regulator in vaporizer should have plug to insert guage to set pressure to approx. 10 psig. or less. May be easier to convert to an Impco system.