My experiment was just with the bowl for starters. Here’s a few before pictures:
Not a nightmare, but a good deal of varnish and gritty stuff. Hit it with carb cleaner and did some lite scrubbing, still had this. On the right I really scraped at it.
So I broke it down as far as it would go, left the gasket where it was, put all the pieces into a tin can, and filled with this stuff, which is quite inexpensive:
Put it on the stove and brought to a very low boil. This was a bit of a mistake as it ends up STINKING pretty bad!
When I went back and did the jets, I used a camp stove outside. I’ve read you can let it just soak for a couple days, but I wanted the quick results.
Let it heat for 20 minutes, cool down, wash thoroughly with warm water, dry, air out the house, and voila!
The pictures show it pretty well, I think it did a really good job, just a little mess there in the upper middle, but it came off easier with a little scrub.
Heres a shot while getting it back on, makes the top look like junk.
Maybe vinegar would work, must research.
