I finally worked my way down the list to the toilet. I removed it from the coach and was able to examine its guts. I found that a cam attached to the flapper was cracked and likely caused when I tried pushing ice cubes (don't ask) into the toilet. The flapper assembly is fragile and the cam was designed to be the weak link, preventing more serious damage when abused. I tried contacting Microphor for information and ordering parts and found that they subcontracted all that work to Mullany and Associates in Marlton, NJ (link below). Previous to calling them, the only parts I could find were for a flapper assembly at Holland RV for $134. Before ordering it, I called Mullany and was glad I did.
I talked to Annabella, who sounded young, but was very knowledgeable. It was obvious from our conversation that she was not following a flow chart, but had a very good understanding of the product. She convinced me that purchasing the assembly (which they do sell for $93), but instead just replacing the cam and a flapper gasket. She made a distinction between toilets made after 1997. I am very careful about making recommendations, but I was very impressed by this company - she said there were three of them. Here's the link:
edmullaney.com
I had the same problem with that cam. I used some epoxy to repair it and it worked fine....... for a while. Permanent fix was to order two (yes 2ea cams that's what makes it a permanent fix). Haven't had I problem since.
Roland
There is also a company that makes aluminum cams that won't break. After talking to the experts, I cancelled that order. I would not try to find a strong cotter pin for a boat prop for the same reason.
I ordered the plastic cam and the metal one (ebay). By the time they both arrived I had spent more time examining and thinking about how the toilet operated, I went with the metal cam, it works great.
Why isn't anyone calling FT Parts? They stock those parts.
A very simple reason: mark up. I've gone to them when I could not find a part somewhere else, such as the rubber sleeves for the slide pins ($18 for a small piece of rubber seemed pretty high, but I had no alternative). On the other hand, I was quoted over $6000 for a radiator/CAC (no labor), but was able to buy it directly from the manufacturer for half that price.
Sorry if I seem disloyal to FT, but as we used to say in the "Corps", loyalty works in both directions.