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Old 11-08-2016, 04:17 AM   #1
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Brand: Thor Motor Coach
State: Texas
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Thor ACE carburetor onan 4000 flooding

carburetor onan 4000 flooding . i can pinch off gas hose and it will run strong until i release gas hose
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Old 11-08-2016, 01:26 PM   #2
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Brand: Thor Motor Coach
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Sounds like the carb float or valve is not working properly. Back in the day, a slight rap on the side of the carb bowl would sometimes free a stuck float, but maybe best to remove the carb and see what is going on. Could have some debris in it, broken tab etc. You have done a good job tracking down the problem.
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Old 11-08-2016, 01:42 PM   #3
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thank you! this onan is giving me a fit
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