Gererac model 09734-3 LP issue

still no joy on the generator staying running after releasing the "prime" switch. we're going to replace the "prime" switch as soon as it gets in. This is a 3 position switch with battery power coming in the lower terminal. When pushed it's supposed to bring the 12V to the center terminal, which in turn energizes the LP fuel solenoid allowing propane to pressure up the line to the carb. When pushing the switch, sometimes I get 12V at the middle terminal and sometimes nothing or something between 0 and 12V. The solenoid actuates"clicks" accordingly.Maybe it's some as simple as the "prime" switch. It ohmed out fine, but who knows once you put voltage and current through it. Stay tuned.