1979 V6 150-235 HP Johnson Outboards Service Repair Manual P/N JM-7910, Page 22Get this manual
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Retard th lever until throttle foHower roHer does 110t touch See Figure 2-9 Loosen upper and lower carburetor level' adjusting screws to aHow return spril1gs throttle shafts to close throttle valvesRo