Exhaust System; Description; Siphon-Break; Exhaust System Precautions - Westerbeke 7A-1 Operator's Manual

EXHAUST SYSTEM
DESCRIPTION
It is important
to
install a proper exhaust system
to
avoid engine
flooding. The system must be designed
to
prevent water from
entering the exhaust line under any sea conditions and at any
angle of the vessel's hull. Exhaust system failures are not covered
by Westerbeke's warranty. The installer should have a basic
knowledge of marine installation requirements.
Westerbeke recommends installing an exhaust system having an
in-line muffler. The in-line muffler should be located below the
engine's exhaust elbow. It must accumulate any water that runs
back down the exhaust line after the engine is shut down. Design
the system so there is an adequate drop in the line between the
exhaust elbow and the through-hull discharge end of the line. The
exhaust hose must be certified for marine use.
A
CAUTION:
An exhaust line that is too long and/or
has
a
poor gradient can cause
water to
retum back
to
the engine when it is shut off.
A
WARNING:
The exhaust system must be tight
and
free of
leaks. Exhaust gasses
are
deadly. Display
the carbon Monoxide waming decal near your engine,
on your cabin bulkhead, or in 50me other prominent
location.
For more information about exhaust system design, see
Westerbeke's INSTALLATION MANUAL for MARINE ENGINES
and GENERATORS, Publication # 43268.
Westerbeke presumes that the installer of this marine diesel engine
is familiar with the safeguards a water-cooled marine exhaust sys-
tem will provide for the engine. Failure
to
design and layout a
proper exhaust system can result in catastrophic damage to the
diesel engine, and possibly result in the sinking of the vessel in
which the unit is installed.
Siphon-Break
For installations where the water-injected exhaust elbow is close
to or below the vessel's waterline, provisions must be made
to
install a siphon-break in the raw water supply hose
to
the exhaust
elbow. The siphon-break provides an air vent in the raw water
cooling system
to
prevent raw water from filling the exhaust sys-
tem and the engine's cylinder when the engine is shut down. See
SIPHON-BREAK in the COOUNG SYSTEM section for more
information.
A
CAUTION:
Fal/ure to use a siphon-break when the
exhaust elbow is located at
or
below the load waterline
will result in raw water damage to the engine and possi-
ble flooding
of
the boat.
EXHAUST SYSTEM PRECAUTIONS
Carbon Monoxide
The best protection against carbon monoxide poisoning is a daily
inspection of the complete exhaust system. Check for leaks
around the exhaust manifold/elbow, exhaust hose, gaskets, and
welds. Make sure there are no fumes entering your boat from a
nearby vessel. Make sure the exhaust lines are not heating the
surrounding areas excessively. If excessive heat is present, correct
the situation immediately. If you notice a change in the sound or
appearance of the exhaust system, shut down the engine immedi-
ately and have the exhaust system inspected and repaired at once
by a qualified mechanic.
A
WARNING:
Exhaust gasses contain carbon
Monoxide, an odorless and colorless gas. carbon
Monoxide is pOi5Onous and can cause unconsciousness
and death. Symptoms
of
carbon Monoxide exposure
can include:
- Dizziness - Throbbing In Temples
-Nausea - Muscular Twitching
- Headache - Weakness and Sleepiness
- Vomiting -Inability to Think Coherently
IF YOU OR ANYONE ELSE EXPERIENCE ANY OF THESE
SYMPTOMS, BET OUT lITO FRESH AIR IMMEDIATELY.
If the symptoms persist, seek medical attention. Shut
down the engine and rentilate the area with clean air.
Do not restart the engine until it has been inspected
and repaired.
Carbon Monoxide Warning Decal
A carbon monoxide warning decal has been provided by
Westerbeke. Display this decal near your engine, on your cabin
bulkhead, or in some other prominent location.
WARNING
Engines Produce CARBON MONOXIDE
Regular Maintenance Required
t:5i!EJWI!STE1IBEICE
En,.-..GMemcn
CARBON MONOXIDE
WARNINO DECAL
Engines
&
Generators
16