Hello all. I've been flying a Hobbyzone SuperCub (electric) for the past 2-1/2 years, and after making about mod possible to the Cub, I've decided to move up to a bigger plane and go glow powered. I located a "gently used" Nexstar RTF kit on Craig's List for $100 bucks and decided to make the plunge. Everything looks good and seems to work perfectly, but I do have one question about the glow engine. Maybe this is normal, but I was rather surprised by the amount of fuel that isn't burned while running the engine. I haven't flown the plane yet, but when I do bench tests of the engine there's a fair amount of fuel spitting out of the muffler. After about 2/3rd's of a tank, there's fuel running down the side of the fuse and the right side landing gear, including wheel, will also be soaked. I've tuned the engine to a lean but safe mixture and it still does it. I have also turned the exhaust port to face more outward instead of down, but that's a temp fix.

Can someone tell me if this is normal? If not, any idea what should be done?

I also noticed the air bubbles in the fuel line described by DenverJayHawk. This is caused by vibration?

Thanks.