I know this is very specific, but maybe there is a more general answer.
I'm working with an oldschool Rosco 1600 smoke machine(Rosco 1600 Smoke Machine). For the first week or so it was working absolutely fine. No issues, large plumes of smoke. We had a (sorry I don't know the specific details) clear water based rosco 'fog fluid' to use in the machine.
When that ran low I switched to a greenish tinted water based rosco 'fog fluid' (rosco FG042110A)
This worked for a day or so, and then the machine started putting out little puffs of smoke instead of large plumes. I thought that it could be either the new fluid, or the machine being clogged.
The 1600 has a port in the back to stick an air hose in and blow the machine clean, so I did that.
After that I found some of the original clear fluid we were using, and switched to that.
I let the machine run for a good 10 minutes on full, and I was still only getting little puffs of smoke. The pump that goes into the fluid container was very jerky, and didn't seem to be pumping a smooth stream of liquid. I'm starting to think that the issues has something to do with that pump, however I am not sure, and have no idea what to do to fix it.
Any and all help would be greatly appreciated.