I have a new Brillelli 46 that started twice just as it should. Attempting to start it for the third time about one week later was different. The engine "popped" when choked but wouldn't start or even sound like it wanted to start off choke. Gas heavily dripped from the carb and the plug was soaked which didn't happen the first two starts. It finally did start using an electric starter but ran very, very rich. I pulled the gas tank and there is no problem with it or the lines which are connected by a "T" valve rather than the three-line technique. This has worked flawlessly for me on other gas engines. I unsuccessfully attempted to start the engine again this morning and the same carb dripping and flooding occurred. The high and low settings were set at Brillelli. The engine has never flown. What might have changed from the initial two starts? Any insights or suggestions?

Turn the low and high needle in to the stop, noting how many turns you put on the needles, so at least you know what settings Brillelli had set it at, then open both one and one half turns and try again, I can only think that possibly there was a settling in of the pump needle in the carb which may have changed with the first two runs, or the diaphram may have settled/expanded now it has had some fuel past it, all the above assume its a Walbro carb and you have not changed anything else, the T valve's do give problems, but its generally air leaks which would make it lean not rich.

Just a suggestion
Mike

In addition to Mike:
A slight leaking of the internal fuel needle will cause fuel admittance to the jets. With the cylinder hanging down, this fuel drips to the lowest point, causing problems. With inverted engine, NEVER move the prop against compression, as this will set the carb pumping!!!!!
Also, set the needles. The brilelli setting is a moment in time at the brilelli workshop. As the engine gets time, settings change. Your altitude may differ like this, following air oxigen content:
higher = leaner, or Vise versa
Hotter = leaner, or Vise versa
Air Moisture higher (humidity)= leaner, or Vise versa.

If your engine runs better in cold dry weather, it is too rich!

Thank you, Mike and Pe, for the suggestions for making the engine run and possible reasons for its behavior. I closed the low end from the factory setting of 1 1/4 turn to 1. The engine started without choking and didn't appear to be running rich. I thought it strange it didn't require choking especially since it had sat for about two hours between attempts to start. I didn't change the high end setting. Transistion from idle was quick and smooth with no hesitation. Being a new engine I want to avoid running it too lean during the break in period. Hopefully, it will continue to perform tomorrow and not present new behaviors as it did before. If it does act up I might check the diaphram to make sure it doesn't have a tear. I had that happen once before but not on a new engine. Thanks again.

gas engines are unlike methanol engines in that they devellop best power when set rich. There is no need to have them rich to the point that rpm are lost. To be sure not to be lean, find the edge of the needle setting, where the engtine just starts to loose rpm on the rich side. This will give you both best power as well as peace of mind.

(grammar edit)