PERIODIC MAINTENANCE
62 GM Series Operation Manual
Figure 6
Figure 6
1 – Direction of Rotation
2–Outlet
3 – Impeller
4 – Inlet
Inspecting the Zinc Anode
The inspection intervals and replacement
schedule for the zinc anode are
determined by seawater characteristics
and your operating environment. Inspect
the zinc anode a minimum of every 300
hours of operation, but shorten this interval
if your operating conditions show a higher
corrosion rate.
Replace the zinc anode when its surface
area has been reduced to less than half of
its original size.
If neglected, seawater will begin to react
with the internal surface areas of the
engine cooling system. This will lead to
seawater leaks, internal corrosion and
eventual failure of engine components.
The zinc anode is located on the inside of
the anode plug and is labeled
“Anticorrosion Zinc.”
Cleaning the Intake Silencer (Air
Cleaner)
1. Open the clamps that secure the air
cleaner cover.
2. Remove the air filter element.
3. Wash the air filter element with a mild
neutral detergent and water.
4. Allow the element to dry completely.
5. Remove any debris from the filter
housing and cover.
6. Reinstall the filter element and secure
the cover with the clamps.
Cleaning the Exhaust / Water Mixing
Elbow
The mixing elbow is attached to the
exhaust manifold. The exhaust gas is
mixed with seawater in the mixing elbow.
1. Remove the mixing elbow.
2. Clean dirt and scale out of the exhaust
and seawater passages.
3. If the mixing elbow is damaged, repair
or replace it. Consult authorized
Yanmar Marine dealer or distributor.
4. Inspect the gasket and replace if
necessary.
5. Replace the mixing elbow with a new
one every 500 hours or two years,
whichever comes first, even if no
damage is found.
Cleaning the Breather Pipe
Consult authorized Yanmar Marine dealer
or distributor.
Checking and Adjusting the
Alternator V-Belt Tension
See Checking and Adjusting the Alternator
V-Belt Tension on page 56.
GM_OM.book 62 ページ ２０１３年６月１０日 月曜日 午後２時２６分
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