I’ve been having the same issue with the PE smoke unit, smoke looking at the stack but not billowing out. Saw that YouTube video and my spring is so ridiculously weak it’s not funny. What junk! I’m on the hunt for a new spring with better tension, hoping my postwar repair guy has a better spring in his hardware store. Also, someone mentioned cleaning the smoke unit. How does the dome of the unit come off and what did you use to clean the inside where the coil is? Mine has all brown and black gunk in there, old smoke fluid I would presume. Any help here would be great. Thanks.
James