New carbs- one barrel pulling in too much air Options

[tornik550]

I purchased brand new weber 44 idf carbs from redline weber recently. I set everything equally between all barrels. I set the idle stop at 1/2 turn on both carbs. The engine started right up. I disconnected the linkage. Checked the air flow with a snail. Equal readings on cyl 1,2. Cyl 3 was pulling in so much air it was off the chart and cyl 4 was barely getting any air. I backed off the idle stop completely and I am still getting a huge amount of air in cyl 3 and almost none in cyl 4.

I took the carb off and visually inspected. Everything appears normal. Both butterflies appear closed.

FYI- I am certain that this is not a valve or cylinder problem. Everything was fine with my previous setup.


Any ideas?

[McMark]

Not the first time I've seen new webers with throttle butterfly problems. If you pull that carb off, and hold it up to the light, I bet you'll see a HUGE gap between the throttle plate and the bore.

You can try loosening the screws that lock the plate to the throttle shaft and see if you can get them to sit better.

[ThePaintedMan]

Not the first time I've seen new webers with throttle butterfly problems. If you pull that carb off, and hold it up to the light, I bet you'll see a HUGE gap between the throttle plate and the bore.

You can try loosening the screws that lock the plate to the throttle shaft and see if you can get them to sit better.

(IMG:style_emoticons/default/agree.gif) That's exactly what it sounds like. One is aligned, and the other is not.