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EXHAUST SYSTEM
Important Information
Improperly designing, installing, or modifying the engine's exhaust system can introduce
seawater or water from condensation into the combustion chambers, damaging the engine. The
installing dealer or boat builder is responsible for proper installation of the exhaust system as
explained in the installation instructions for the product. Engine damage resulting from water
ingestion is not covered by the product warranty, unless the damage is the result of a defective
part supplied by the engine manufacturer.
The exhaust system must be installed in accordance with the information contained in this section
to prevent water intrusion problems. Special care is required on the transom or hull exhaust
applications, as these custom‑designed exhaust systems can create a tuning effect that can cause
water to be forced back into the engine. The instructions under Checking for Water Intrusion
must be performed to ensure that water intrusion is not occurring. It is the boat manufacturer's
responsibility for ensuring that water intrusion does not exist with their unique exhaust system.
Engines with through propeller exhaust have been carefully designed and tested to avoid water
intrusion problems and no additional testing is required. These applications require that only that
exhaust elbow height be checked as outlined under Measuring Exhaust Elbow Height.
Installing the exhaust system incorrectly can lead to serious injury or death. When installing or
designing exhaust systems, follow all federal, state, and local boating and safety standards for
the market in which the boat will be sold.
Exhaust system design and installation can affect:
•
Noise level.
•
Performance.
•
Water Intrusion.
•
Carbon monoxide levels.
•
Component longevity.
Carbon Monoxide Poisoning
IMPORTANT: The following important information is covered in the owner's operation,
maintenance and warranty manuals. You may also want to include this information in the boat
owner's manual.
Carbon monoxide is present in the exhaust fumes of all internal combustion engines including the
outboards, sterndrives, and inboard engines that propel boats, as well as the generators that power
various boat accessories. Carbon monoxide is a deadly gas that is odorless, colorless, and
tasteless.
Early symptoms of carbon monoxide poisoning, which should not be confused with seasickness
or intoxication, include headache, dizziness, drowsiness, and nausea.
Carbon monoxide poisoning can lead to unconsciousness, brain damage, or death. Keep the
boat well ventilated while at rest or underway and avoid prolonged exposure to carbon monoxide.
Good Ventilation
Ventilate passenger area, open side curtains, or forward hatches to remove fumes.
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NOTICE
WARNING
!
WARNING
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SECTION - 3
90-899883183 DECEMBER 2007
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