mercury Workshop Repair Guides

Mercury Workshop Service and Repair Manuals

Engine - Hard Cold Starts/Hesitation/Stalls On Start-Up|Page 4991 > < Engine - Hard Cold Starts/Hesitation/Stalls On Start-Up|Page 4989
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Throttle Body: Description and Operation

    Air flow to the engine is controlled by the throttle body through a single butterfly-type valve. Throttle position is controlled by a cable/cam throttle
linkage. The throttle body has a single bore with an air bypass channel around the throttle plate. The bypass channel controls both cold and warm engine
idle air flow which is regulated by an air bypass valve assembly mounted on the throttle body. The air bypass valve is controlled by the ECU and
incorporates a linear actuator which positions a variable area metering valve.

Engine - Hard Cold Starts/Hesitation/Stalls On Start-Up|Page 4991 > < Engine - Hard Cold Starts/Hesitation/Stalls On Start-Up|Page 4989