Throttle Body - MerCruiser 305 CID (5.0L) Service Manual

FUEL INJECTION DISASSEMBLY AND REASSSEMBLY

Throttle Body

REMOVAL
Ensure that fuel pressure is relieved before removing the fuel inlet and return lines.
IMPORTANT: DO NOT allow the TP sensor, fuel pressure regulator, fuel injectors and
IAC valve to come into contact with solvent or cleaner. These components should be
removed prior to immersion in solvent.
1. Remove the flame arrestor from the throttle body.
2. Disconnect throttle cable.
3. Disconnect the electrical connections from the TP sensor, IAC and fuel injectors.
(Squeeze plastic tabs on injectors and pull straight up).
4. Remove fuel inlet and outlet lines from throttle body.
5. Remove screws retaining the throttle body to adapter plate.
NOTE: Place a shop rag over the intake manifold opening to prevent debris from entering
intake manifold.
CLEANING AND INSPECTION
1. Thoroughly clean metal parts of throttle body in a cold immersion type cleaner. Dry with
compressed air. Make certain that all passages are free of dirt and burrs.
2. Inspect mating surfaces for damage that could affect gasket sealing.
3. Inspect throttle body for cracks in casting.
4. Inspect throttle plates, linkage, return springs, etc., for damage, wear and foreign
material.
5. Check intake manifold plenum for loose parts and foreign material.
Index
Page 5E-56
a - Electrical Connections
CAUTION
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a
SERVICE MANUAL NUMBER 24
73750
90-861327--1 OCTOBER 1999