The fuel must be getting pulled back into the air. If not, it would accumulate and the intake would eventually fill up with raw gas. The fuel has to be making its way into the chamber....and if it were running into the chamber in a purely liquid state, we wouldn't see clean spark plugs and good power. I think that if you are showing a decent A/F ratio on the exhaust side, the engine is fairly content. The compensation for the fuel puddling? The carb would be jetted leaner until the A/F ratio came into range. I'll bet that Kaase engine, despite the fuel puddling we see, is showing some decent BSFC numbers. I wish he told us.
