I have/had a BME44 and it was the same thing with mine. So I called Kieth.

After a short discussion, this is what we came up with. Leave the igntion ON and act like this thing is going to fire up, CHOKE it and now flip till it farts. Take the choke off and try again, SHE'LL RUN I PROMISE.

What it amounts to is that when I was leaving the ignition off, it was flooding. Apparently it doesn't take as much as I/you thought. I have never had a problem since.

Keep in mind that if it is the first time you are firing it up in a couple of days you can prime it, but I would not plip that prop more than 6 time without the ignition on.

Good luck and let me know if this helps.
Jeff

PS as new as it is the needle adjustments are VERY TOUCHY and even more so in cooler weather.