Yanmar 6LY3 series, Operation Manual

Page: 102 / 136

PERIODIC MAINTENANCE
94
6LY3 Operation Manual
1 For EPA requirements, see EPA Requirements on page 112 .
Note: These procedures are considered normal maintenance and are performed at
the owner’s expense.
Cooling
System Seawater
outlet
c
During
Operation
Check coolant level
c
Check the seawater pump impeller
c ‘
Replace the engine coolant
Every year
When long life coolant is used, replace every two years. See Filling Heat
Exchanger with Engine Coolant on page 48.
Clean & check the seawater
passages
z
Clean seawater and engine
cooling system
z
Replace anode
‘
Air Intake and
Exhaust
System Clean the air intake silencer
c
Clean the exhaust/water mixing
elbow
c
Clean the turbocharger blower
z
1
Flush aftercooler
z
Electrical
System Check the alarm indicators
c
Check the electrolyte level in the
battery
c
Adjust / replace the tension of the
alternator belt
c c ‘
Check the wiring connectors
c
Engine
Cylinder Head
and Block
Check for leakage of fuel, engine
oil and engine coolant
c
After
starting
Tighten all major nuts and bolts
z
Adjust intake / exhaust valve
clearance
z
(1st time)
z
Miscellaneous
Items Check the electronic control
system operation
c
c
(1st time)
Adjust the propeller shaft
alignment
z
(1st time)
z
Check / replace flexible engine
mounts
c ‘
c
: Check
‘
: Replace
z
: Contact your authorized Yanmar marine dealer or distributor
System Item Daily
Periodic Maintenance Interval
Every
50 hrs. or
one month
whichever
comes
first
Every 250
hrs. or one
year
whichever
comes
first
Every 500
hrs. or 2
years
whichever
comes
first
Every
1000 hrs.
or 4 years
whichever
comes
first
Every
2000 hrs.
or 8 years
whichever
comes
first
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