I have a spring on the Zenith throttle shaft that will pull WOT if the
throttle cable breaks. That WOT spring was keeping the butterfly slightly
open and not closing fully at idle. Verified operation by loosening the Bug
Nut for the Bowden cable on the carb throttle arm: The throttle goes to W
I have had a throttle cable break and a mixture cable break. I have a spring on
my mixture now.
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On Jun 20, 2013, at 9:11 PM, Tinyauto at aol.com wrote:
> Years ago I took my Grumman TR2 to get it's annual inspection. The
> carburetor was rebuilt and I flew it about an ho
Years ago I took my Grumman TR2 to get it's annual inspection. The
carburetor was rebuilt and I flew it about an hour when the throttle arm came
unhooked in flight. If the carburetor had been spring loaded to go to idle,
It would have been a very bad thing. However, the carburetor was spr
Finally got my Zenith carb adjusted on my 2180 VW to consistently and
reliably idle at 700 RPM. I found that the torsion spring between the
butterfly shaft and the throttle arm was not strong enough to return the
shaft to the full closed position. I added another extra tension spring
from the
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