Mercury MERCRUISER, Service Manual, Page: 392 / 566

Clamp Tool 91‑803146T
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 - Throttle body mounting screws
b - Electronic throttle control (ETC) connector
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.
56544
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.
a
b
a
a
56540
a
MPI ECT Fuel System
Page 5A-22 © 2016 Mercury Marine 90-8M0099748 eng DECEMBER 2015