ORIGINAL: Cambo
Guys, i have put about 3-1/2 gallons through it. I know it isn't completley broken in but i just can't get the mid range to stop burbling and missing. My question is, how do u know when the low end is too lean. I did the fix on the carb that runs a line from that little pressure whole on top of the carb. I am still new to gasser tuning. It is not like the engine runs like ****. I can go through all my aerobatics without concern of it quiting. However, inverted flight along with verticle flight lets the engine run so smooth. I just can't seem to get there with my tuning.
Also, I have it set for a high and low idle. Since this is ony a small plane, 13#, i need the low idle to land. The low idle is fairly reliable except for the couple seconds the plane slows down after tuch down. The engine just always dies. Sometimes if i goose the throttle for a second it does fine but if i forget it is a 200ft walk. Really anoying.
What am i doing wrong
Cameron
Like frieshoo says, LOTS of variables. However, most burbling is low end rich. Tell us how the engine starts. Easy? Do you have to flip several times after the choke run to get it going?
Low end affects high end, so....if your high end is set "right", as you lean the low end, you'll need to back out the high just a skosh.
Lean the low end, after the engine is FULLY warmed up (after a flight would be ideal, as long as you're not overheating). Adjust it CW until on RAPID throttle up there is a bog or hesitation. Rapid as in "dump the throttle". That really is the only sure way to know if you're too lean low side.
The burbling and spittin' is nearly always, at least on my 3 DL's "always", too rich low end.