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Stromberg 175 idle

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erstearns

Jedi Trainee
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Noticed lately that slow idle is too high, 1200-1300, the adjusting screws are backed all the way out. What to do next. The old girls was supposedly "rebuilt" but it appears that much of it was cosmetic not mechanical. Thinking about a carb rebuild and adding a 3rd but am puzzled about how to adjust the idle down temporarily. Any ideas?
 
Brosky

Brosky

Great Pumpkin
Offline
If the idles screws are all of the way out, you may have a vacuum leak, or be running too rich from an internal problem or the chokes may be stuck closed.

Are all of the linkages free and non binding? Is the choke cable opening the choke all of the way? Did you disconnect the linkage between the carbs and start from base idle setting procedure after checking that the throttle linkage wasn't sticking open a bit?
 
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erstearns

Jedi Trainee
Offline
After thinking more about it I played with the linkage some and it will idle slower if I push down on top of the linkage. I guess a general adjustment, cleaning etc. is in order. Time to pull our the manual and relearn what I knew 25 years ago about twin bergs.
 
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