Hello,
I'm entering now with this thread for the first time in forum.
I tried to search something to help me about my problem but I didn't find anything at the moment.
About the lantern in object (HK150) I have difficult to mantain for '90 seconds at least' the pressure value around red mark of manometer so I'm not able to do the necessary pre-heating having problem with mantle burning; it burns by a big flame and it doesn' become incandescent.
When I put the flame of match or lighter near pre-heating burner, it needs many seconds to burn (probably because of high pressure of jet, even if I start with manometer indicating a little bit over the red mark like instructions show by the relative photo) so pressure value decreases quickly and afterwards (when I can close the rocker-arm) I'm not able to mantain that value of pressure.
Thanks at all.