Quote:
Originally Posted by Marvin/TN
Rotor Wrench, just wondering what is the airplane in your avatar? Maybe a B-17? I am an old Air Craft mechanic in the USAF
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It's a B-17G. Most would think Boeing but that one was built by Douglas Aircraft at their Long Beach plant.
If it is running lean due to plugged passages or the like, it will run better if you pull out the choke. This cuts the air flow back and gets the mixture back into an operable ratio. Without the choke, it will have a tendency to back fire or hiccup through the throat of the carb. If it is running too rich, the choke won't help at all and it may have a tendency to after fire in the exhaust if too much fuel is leaking by. If you look down the throat into the venturis while it is running, you can see if raw fuel is dribbling down in there. That is if it will stay running while you do that.