Kohler 6.5-27EFOZD, Service

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TP-6255 7/06 26 Section 3 Intake and Exhaust System
3.2 Exhaust System Inspection
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.
At the interval specified in the service schedule, inspect
the exhaust system components (exhaust manifold,
mixing elbow, exhaust hose, hose clamps, silencer, and
outlet flapper) for cracks, leaks, and corrosion.
Ensure that the carbon monoxide detector(s) is (1) in the
craft, (2) functional, and (3) energized whenever the
generator set operates.
For your safety: Never operate the generator set
without a functioning carbon
monoxide detector(s) for your
safety and the safety of others on
your vessel.
Exhaust System Inspection Points
Check for exhaust leaks and blockages. Check the
silencer and piping condition and check for tight exhaust
system connections.
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 and/or hangers
as needed.
D
Check that the exhaust outlet is unobstructed.
D
Visually inspect the exhaust system 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.
3.3 Servicing Mixing Elbow
The mixing elbow combines high-temperature exhaust
with cooling seawater. The mixture when exposed to
engine vibration makes conditions conducive to rapid
deterioration and failure if the elbow is not properly
maintained.
1. Check the mixing elbow for carbon buildup and
corrosion inside the pipe.
2. Clean or replace the mixing elbow as necessary.
3. Inspect the exhaust manifold mounting threads for
cracking and corrosion.
3.4 Turbocharger
(Models: 14/15.5/23/24EOZD
and 11.5/13/20EFOZD)
Inspect the compressor (blower) at the specified interval
for build-up of carbon residue. Perform all other
turbocharger inspection and service as described in the
service schedule of the engine service manuals. See
Figure 3-3 and Figure 3-4 to inspect the compressor.
Compressor Inspection:
1. Remove the breather hose from the air intake
silencer connector, if equipped.
2. Remove the air intake silencer.
3. Inspect the compressor (blower) housing and the
impeller (blower wheel) for buildup of carbon
residue. Use a Yanmar approved turbocharger
cleaner, if cleaning is required.
4. Place the air intake silencer over the turbocharger
compressor housing inlet and tighten the clamp.
5. Attach the breather hose to the air intake silencer
connector, if equipped.