I started asking questions about this issue in another thread a while ago but sort of lost where I was. Anyway, for the first time I have encountered the following FREEFLOW problem in my rebuild of a USD Calypso IV (non J-Valve) reg.
IP is fine (and I have actually experienced the same problem described below at varying IP’s). 2nd stage adjusted normally. 2nd stage lever is not caught on anything and moves freely, always popping back up into place when manually depressing it. HOWEVER, when diving with it I will inhale and on occasion it will get stuck in lever down position and freeflow. When that happens, nothing I can do will stop the freeflow - not pushing on the purge button, not exhaling forcefully, not taking the 2nd stage out of my mouth and moving it up and down in the water column or even banging it on my arm. Just solid freeflow. I’ve adjusted and re-adjusted but still the same thing - and only on this 2nd stage (I tried a different 2nd stage on the 1st and zero problem). Parts all look good. I’m at a loss. Happy to have someone show my ignorance. Mark