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Mercury MERCRUISER Product Applications Manual

Mercury MERCRUISER
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Exhaust System
Page 6A-14 90-863758060 AUGUST 2006
Install risers or lower the muffler if necessary to meet minimum exhaust elbow height.
The water line inside the muffler is the beginning measurement point to determine the
correct elbow height.
Collector and Water Lift Muffler
a
b
e
f
g
k
c
i
h
d
j
15636
Typical
a - Water line
b - Siphon break (vacuum valve) Must
be installed in cooling water circuit
if exhaust elbows are at or below
water level. Refer to muffler
manufacturing recommendations.
c - Exhaust back pressure check
point
d - Resonator
e - 46 cm (18 in.) minimum between
exhaust elbow and collector
f - 10° downward slope minimum
g - 3° downward slope minimum
h - Collector
i - Minimum exhaust elbow height with
maximum load
j - Drain fitting
k - External flappers
S‑pipe Used With Water Lift Muffler
a
c
b
7556
a - Water line
b - Minimum exhaust elbow height
with maximum load
c - Drain plug

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Mercury MERCRUISER Specifications

General IconGeneral
Number of Cylinders4, 6, 8
Engine TypeInboard/Outboard (Sterndrive)
Fuel TypeGasoline
AspirationNaturally Aspirated
Cooling SystemWater Cooled
WeightVaries by model
Cylinder ConfigurationInline
Displacement Range3.0L-8.2L

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