TP-5936 7/04 7Section 3 Intake and Exhaust System
Section 3 Intake and Exhaust System
3.1 Air Intake Silencer/Cleaner
At the i nterval specified in the service schedule, clean or
replace the air intake silencer. Clean more frequently in
dirty, dusty conditions.
3.2 Exhaust System
Carbon monoxide.
Can cause severe nausea,
fainting, or death.
The exhaust system must be
leakproof and routinely inspected.
WARNING
Inspecting the exhaust system. Carbon monoxide can
cause severe nausea, fainting, or death. For the safety of
the craft’s occupants, install a carbon monoxide detector.
Consult the boat builder or dealer for approved detector
location and installation. Inspect the detector before each
generator set use. In addition to routine exhaust system
inspection, test the carbon monoxide detector per the
manufacturer’s instructions and keep the detector operational
at all times.
Exhaust System. Check for exhaust leaks and
blockages. Check the silencer and piping condition and
check for tight exhaust system connections.
Inspect the exhaust system components (exhaust
manifold, mixing elbow, exhaust line, hose clamps,
silencer, and outlet flapper) for cracks, leaks, and
corrosion.
D Check the hoses for softness, cracks, leaks, or dents.
Replace the hoses as needed.
D Check for corroded or broken metal parts and replace
them as needed.
D Check for loose, corroded, or missing clamps.
Tighten or replace the hose clamps as needed.
D Check that the exhaust outlet is unobstructed.
D Visually inspect for exhaust leaks (blowby). Check
for carbon or soot residue on exhaust components.
Carbon and soot residue indicates an exhaust leak.
Seal leaks as needed.
D Ensure that the carbon monoxide detector is (1) in the
craft, (2) functional. and (3) energized whenever the
generator set operates.
3.3 Mixing Elbow
The mixing elbow combines high-temperature exhaust
and cool seawater. When exposed to engine vibration
this mixture can cause rapid deterioration and failure in
an incorrectly maintained exhaust system.
1. Check inside the mixing elbow for carbon
accumulation and corrosion.
2. Remove carbon accumulation.
3. Inspect the exhaust manifold mounting surface for
cracks and corrosion.
4. Replace a damaged mixing elbow or other
components to prevent engine exhaust (carbon
monoxide) leakage.
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