
PERIODIC MAINTENANCE
52 GM Series Operation Manual
Note: These procedures are considered normal maintenance and are performed at the
owner’s expense.
: Check or Clean ✧: Replace ●: Contact your authorized Yanmar Marine dealer or distributor
System Item
Periodic Maintenance Interval
Before
Starting See
Daily
Checks on
page 35.
Initial
50
Hours
Every
50
Hours
Every
150
Hours
Every
250
Hours or
1 Year
Every 1000
Hours or 4
Years
Whole Visually inspecting the engine exterior
Fuel System*
Inspecting the fuel level
Draining the fuel tank
Draining the fuel filter / water separator
Replacing the fuel filter element
✧
Inspecting the fuel injection timing
●
Inspecting the fuel injection nozzle
spray pattern
●
Lubricating
System
Inspecting the oil level
Engine
Marine
Gear
Changing the oil
Engine
✧✧
Marine
Gear
✧
✧
Inspecting the function of the oil
pressure warning lamp
During
Operation
Replacing the engine oil filter element
✧✧
Cooling
System
Inspecting the seawater outlet
During
Operation
Inspecting the seawater pump impeller
✧
Inspecting the zinc anode ✧
Air Intake and
Exhaust
System
Cleaning the intake silencer (air filter)
Cleaning the exhaust / water mixing
elbow
Cleaning the breather pipe
Inspecting the exhaust gas condition
During
Operation
Electrical
System
Inspecting the function of the battery
charge warning lamp
Inspecting the battery electrolyte level
Checking and adjusting the alternator
V-belt tension
✧
Checking the wiring connectors
Engine
Cylinder Head
and Block
Inspecting for fuel, oil or engine leaks
After
Starting
Tightening all major nuts and bolts
●
Adjusting the intake / exhaust valve
clearances
●
Miscellaneous
Items
Inspecting and adjusting the throttle
and shift control cables
●
Adjusting the propeller shaft alignment
●
GM_OM.book 52 ページ 2013年6月10日 月曜日 午後2時26分
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