Reply To: 1956 Evinrude 15hp Throttle Q and Fouling

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June 11, 2021 at 7:37 am #239958
JACQUES
Participant

    the closed carb butterfly concentrates the crankcase vacum pull on the carb idle circuit located on top where fuel drops down 3 VERY small holes. They must be clean and the only way to clean the idle circuit properly is to remove the top plug, clean the chamber and reinstall a new plug .

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