Description; Torque Specifications; Sealants; Preparation - Mercury MerCruiser MCM 454 Mag MPI Service Manual

RISERS

Description

The exhaust riser is designed to increase the height of the exhaust elbow. This allows boats
with a low mounted engine package to meet the minimum exhaust system height require-
ments.

Torque Specifications

Exhaust Elbow
Exhaust Riser

Sealants

Quicksilver Perfect Seal

Preparation

Avoid possible injury or damage to equipment should wires be accidentally
shorted. Disconnect BOTH battery cables from battery before proceeding.
1. Disconnect battery cables from battery.
Avoid severe engine damage. Exhaust elbows and manifolds MUST BE drained to
prevent water (or coolant) from entering combustion chambers when exhaust el-
bows are removed.
2. Drain exhaust elbows and exhaust manifolds. Refer to SECTION 1B.
Index
Page 7C-2
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Fastener Location
Description Part Number
92-34227--1
WARNING
CAUTION
SERVICE MANUAL NUMBER 23
Lb. Ft. N·m
25 25 34 34
90-861326--1 MARCH 1999