Installation - Mercury MerCruiser MCM 454 Mag MPI Service Manual

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MANIFOLDS AND ELBOWS

Installation

IMPORTANT: See SECTION 7C if exhaust risers are used.
1. Using new gasket, install exhaust manifold to cylinder head. Torque fasteners to 25 lb-ft
(34 Nm).
2. Using a new gasket, install exhaust elbow to exhaust manifold. Torque fasteners to 25
lb-ft (34 Nm).
3. Port Manifold:
a. Install remote oil filter and bracket.
b. Install components on exhaust elbow (if necessary).
4. Starboard Manifold:
a. Install bolt to secure water separating fuel filter bracket to exhaust manifold.
b. Install shift plate assembly on exhaust elbow (MCM only).
c. Connect instrument harness plug to engine harness, if disconnected previously.
d. Connect both shift cables (MCM only).
5. Install exhaust elbows and cooling hoses.
6. On Closed Cooled Models: Refill closed cooling system to operating level with
properly mixed coolant. Refer to SECTION 6B.
7. Reconnect battery cables to battery. Tighten securely.
8. Start engine and check for fuel, exhaust and water leaks.
Index
Page 7B-4
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SERVICE MANUAL NUMBER 23
90-861326--1 MARCH 1999

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