One MGB carburetor problem solved but another shows up

Posted By on November 5, 2011

First the good news … the problem I have been having with the idle was as expected due to the Weber carburetor and after taking it apart and cleaning the jets with a small welding tip cleaner has been fix. The engine idles like a kitten (although a hungry cold one left outside – a bit loud) and I’ve been able to adjust the idle speed screw and idle mixture screw without an issue. I’m suspecting there was something either in the fuel or in the machining of the carburetor that plugged the small port.

102_0315 102_0318
I’m still impress with the macro photos coming from the pocketable Kodak Playsport Zx5 mini camcorder. I wish all the photos were this good (click for larger)

Unfortunately I’m now having a problem with acceleration hesitation and stutter when the primary throttle valve is opened too quick … or in my opinion even if it is not so quick. Timing is advanced about 12 degrees and I even added new plugs today thinking that the mixture just wasn’t igniting causing the backfires?  I’ll have to do a little more research. (posting a video clip below)

Below is an illustration of the Weber carburetor circuits (click for larger)

tech_carb_tuning_fig3

Comments

Desultory - des-uhl-tawr-ee, -tohr-ee

  1. lacking in consistency, constancy, or visible order, disconnected; fitful: desultory conversation.
  2. digressing from or unconnected with the main subject; random: a desultory remark.
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