ORIGINAL: combatpilot
Dieco I didnt have that problem at all with my carb. Is your carb brand new or is it a rebuild? mine would pull hard on the top end and then drop off after a little running at top speed. I finally figured out my needle valve lever wasent set properly and after readjusting it pulled hard on the top end and didnt drop at all. it also ran better on idle and transitioned very well.
Thanks for the tip.
It is a used carb but looks like it's had a rebuild kit put in it. I did have the covers off and it appeared the tang was even with the adjacent flat of the carb body which is what is recommended as a starting point if the official gage is not available. I'll look at it more carefully and even try to measure the drop from the outer part of the carb which is the way the official Walbro gage works. I've read that this setting may depend on which configuration of diaphragm is used but I've not found an actual measurement defined for the two different types.
diceco