Mercury 8.1S Horizon, Product Applications Manual

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Exhaust System
90-863758060 AUGUST 2006 Page 6A-1
6
A
Exhaust System
Section 6A - Exhaust System
Table of Contents
Exhaust System...............................................6A-2
Important Information................................6A-2
Carbon Monoxide Poisoning.....................6A-2
Exhaust Connections................................6A-3
Exhaust Through‑Hull Fittings..................6A-5
Exhaust Resonators.................................6A-5
Exhaust System Design...................................6A-7
Exhaust System Specifications.................6A-7
Collector Inlet and Outlet Specifications
..................................................................6A-8
In‑line Muffler............................................6A-8
T Junction With In‑Line Muffler...............6A-10
V‑Pipe and In‑Line Muffler......................6A-11
Water Lift Exhaust System.....................6A-11
Collector and Water Lift Muffler..............6A-14
S‑pipe Used With Water Lift Muffler.......6A-14
Measuring Exhaust Elbow Height..................6A-15
General Information................................6A-15
Boat Requirements.................................6A-16
Loading Requirements............................6A-17
Loading the Boat with a Capacity Plate
................................................................6A-17
Loading the Boat—Without a Capacity Plate
................................................................6A-20
Clear Hose Measurement Method..........6A-22
Clear Hose Measurement Method From
Seacock or Muffler Drain........................6A-23
Testing the Exhaust System..........................6A-24
Through‑Transom Exhaust Back Pressure
................................................................6A-24
Exhaust Back Pressure Test..................6A-25
Check for Water Intrusion.......................6A-26