I just stumbled across this thread. I have two 2.10 Mokis. The one in my 80" Midwest Extra 300 hadn't been run in a long while, so I cleaned the carb thoroughly, installed new o-rings (from the Moki parts lady in England) and re-plumbed the tank. It behaved just like yours - wouldn't pull fuel, etc. This plane had been flown with this engine and carb for several years! It wouldn't run on the bench, either. Finally, I swapped the (cleaned/rebuilt) carb from the other 2.10 and it runs just like it used to. Hmmm??? I put the carbs side-by-side and compared absolutely everything, but they appear identical. I will again disassemble the suspect carb to check for possible swarf that I might have missed. Once I find what the issue is, I'll report back. I can test the suspect carb with the #2 engine on the bench.

Let us know what Bill says - he is very knowledgeable.

JIm