Thanks for all the info guys....I've experienced all of the situations mentioned and think I'm finally getting there.

I'm putting the engine on a little .25 size Ultimate 30 Bipe I found on the internet. Neat little plane, but it was made in China and the instructions had about four lines of written instructions (literally), and non descript drawings instead of pictures...so it's been interesting putting it together since it's my first bipe. It's an ARF and nicely made but the lack of instructions has caused me to make a few mistakes.

Anyway, my first test run was on my field stand without the wings. I tried to fuel it with the engine upright (which put the plane upside down), and man, did the fuel come flying out of the muffler. I forgot all about the tank being upside down (duh). I took the engine off the plane and mounted it on my test stand and tried to run it upside down there. Kept flooding the carb and locking the shaft up, only to realize I had the fuel tank about 6 inches above the carb. FINALLY, I repositioned the tank to about level, if not slightly lower than the carb, only gave it about one flip for priming, and voila, it cranked. I'm not sure if I'm detecting a very slight mist of fuel in the air behind the prop, and if so, if this is caused by it being inverted. I guess I can live with that as long as it flies. I'll be checking the inside of the cowling to see if it makes a big mess.

I'll be trying some of your other suggestions, but wanted to say again, thanks for your help....

Brian