PERIODIC MAINTENANCE
6SY Operation Manual
93
Perform the following maintenance every
250 hours of operation.
• Check Unit Injector Spray Pattern
• Adjust Intake / Exhaust Valve Clearance
(1st Time)
• Adjust Unit Injectors Rocker Arms (1st
Time)
• Drain the Fuel Tank
• Replace the Fuel Filter Element
• Replace the Engine Oil (Crankcase)
• Replace the Engine Oil Filter Element
• Clean Centrifugal Engine Oil Cleaner
• Replace Crankcase Ventilation Filter
• Check the Seawater Pump Impeller
• Check and Replace the Anodes
• Clean the Air Intake Filter
• Clean the Turbocharger
• Flush the Charge Air Coolers
• Check the Wiring Connectors
• Tighten All Major Nuts and Bolts
• Check or Replace the Flexible Engine
Mounts
• Drain, Flush and Refill Cooling System
With New Coolant
Check Unit Injector Spray
Pattern
See your authorized Yanmar marine dealer
or distributor.
Adjust the Intake / Exhaust
Valve Clearance
Proper adjustment is necessary to
maintain the correct timing for opening and
closing the valves. Improper adjustment
will cause the engine to run noisily,
resulting in poor engine performance and
engine damage. See your authorized
Yanmar marine dealer or distributor to
adjust the intake / exhaust valve clearance.
Check and Adjust the Unit
Injector Rocker Arms
Proper adjustment is necessary. See your
authorized Yanmar marine dealer or
distributor to adjust the unit injector rocker
arms.
Drain the Fuel Tank
See the boat manufacturer’s literature for
procedure.
Replace the Fuel Filter Element
See
Drain or Replace the Fuel Filter
Element
on page
90
.
Replace the Engine Oil and
Engine Oil Filter Element
See
Replace Engine Oil and Engine Oil
Filter Element
on page
81
.
Replace the Engine Oil and
Engine Oil Filter Element
See
Replace Engine Oil and Engine Oil
Filter Element
on page
81
.
Clean Centrifugal Engine Oil
Cleaner
See
Clean the Centrifugal Engine Oil
Cleaner
on page
83
.
Every 250 Hours of
Operation
Summary of Contents for 6SY Series
Page 1: ...6SY series OPERATION MANUAL 6SY Operation Manual P N 0A6301 G0000 MARINE ENGINES ...
Page 34: ...PRODUCT OVERVIEW 26 6SY Operation Manual This Page Intentionally Left Blank ...
Page 54: ...BEFORE YOU OPERATE 46 6SY Operation Manual This Page Intentionally Left Blank ...
Page 120: ...LONG TERM STORAGE 114 6SY Operation Manual This Page Intentionally Left Blank ...
Page 126: ...President Yanmar Marine Int l ...
Page 127: ...President Yanmar Marine Int l ...
Page 128: ...EPA WARRANTY USA ONLY 120 6SY Operation Manual This Page Intentionally Left Blank ...