Installation - Mercury MerCruiser MCM 454 Mag MPI Service Manual

454 CID (7.4L) / 502 CID (8.2L)

Installation

IMPORTANT: The inertia weight section of torsional damper is assembled to the hub
with a rubber type material. The installation procedure (with proper tool) must be fol-
lowed or movement of the inertia weight on the hub will destroy the tuning of the tor-
sional damper.
1. Replace key in crankshaft if it is damaged.
2. Coat seal surface of torsional damper with engine oil.
3. Install torsional damper on crankshaft, using Torsional Damper Remover and Installer
as follows:
a. Install appropriate end of threaded rod into crankshaft.
IMPORTANT: Be sure to install threaded rod in crankshaft at least 1/2 in. (13 mm) to
prevent damage to threads.
b. Install plate, thrust bearing, washer and nut on rod.
c. Install torsional damper on crankshaft by turning nut until it contacts.
d. Remove tool from crankshaft.
e. To prevent oil leakage, apply Quicksilver RTV sealant to keyway.
f.
4. Install drive pulley and water pump pulley. Torque bolts to 35 lb-ft (48 Nm).
5. Install and adjust drive belt.
Index
Page 3A-54
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a - Torsional Damper Remover and Installer (J-23523-E)
Install torsional damper bolt. Torque to110 lb-ft (149 Nm).
SERVICE MANUAL NUMBER 23
a
90-861326--1 MARCH 1999
72346