air-madness

My Sure Start has 1.5 inch spinner and I am using 7x3 and 7x4 props. Also, the fuel tank is a little brass 1/2oz - no pressure line at all. It will idle reliably (no stalls) around 2800 rpm. I did, however, through trial-and-error use a pressure line that worked by catching the prop wash (wind). I ran a line from the tank to a clip that I made to wrap around the cylinder jug. The end of the line had a little cone (much like the venturi on a carb) to catch the air in a larger area - this worked great, but I found out it wasn't needed at all. It works basicly by gravity feed. The tank needs to mount roughly a 1/2 inch above the carb where ever it is placed with the fuel line facing down from the tank.