Thanks MidwestODR. I found the tiny hole hidden under the whistle, was able to thread the “funnel” into it and load fluid. I thought the plastic funnel with capillary tube end might be for loading fluid, but it seemed like the capillary tube was too small. I guess the smoke fluid has such a low viscosity that it works.
I have some hypodermic needles that I use to load fluid in diesels with tiny grill openings. I was thinking of using one of those, but won’t since the funnel works.
And I agree about MTH and documentation. I’m an MTH guy, but documentation is not their strong suit. It’s not unusual for manuals to be outdated, incomplete or in this case nonexistent.
