Throttle Body; Throttle Body Removal; Throttle Body Cleaning And Inspection - Mercury MerCruiser Service Manual

MPI ECT Fuel System
Clamp Tool

Throttle Body

Throttle Body Removal

1. Remove the engine cover.
2. Remove the flame arrestor. Refer to the appropriate procedure in Section 1C ‑ Maintenance for details.
a
3. Remove the ETC connector.
4. Remove the four throttle body mounting screws.
5. Remove the throttle body.
6. Remove and discard the throttle body gasket.
IMPORTANT: Insert a clean shop towel into the opening of the intake manifold to prevent foreign material from entering
the engine.

Throttle Body Cleaning and Inspection

IMPORTANT: Do not use cleaners containing methyl ethyl ketone.
IMPORTANT: Do not damage the adapter or throttle body when removing gasket material.
1. Carefully remove the gasket material from the intake manifold adapter and throttle body.
2. Thoroughly clean all parts of the throttle body. Ensure that all passages are free of debris and burrs.
3. Inspect the gasket mating surfaces for damage that could affect sealing.
4. Inspect the throttle body casting for cracks.
5. Inspect the throttle plates, linkage, return springs, and other components for damage, wear, and foreign material.
Page 5A-22
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a
b
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Throttle body gasket
© 2016 Mercury Marine
91‑803146T
a - Throttle body mounting screws
b - Electronic throttle control (ETC) connector
56544
90-8M0099748 eng DECEMBER 2015