Every 2000 Hours Of Operation - Yanmar 6LY3-STC Operation Manual

Replace Alternator Belt
Replace the alternator belt with a new one
every 1000 hours or four years, whichever
comes first, even if there is no crack or
damage in the surface.
See Adjust Alternator V-Belt Tension on
page 56.
Adjust 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.
Replace Flexible Engine Mounts
Be sure to replace the Yanmar flexible
engine mounts every 1000 hours or 4 years,
whichever comes first.
The rubber tension of the flexible engine
mounts is lost after many hours of use. This
leads to a drop in vibration absorption
performance, and also causes centering
misalignment of the propeller shaft.
6LY3 LDC Operation Manual

Every 2000 Hours of Operation

Perform the following maintenance every
2000 hours or eight years of operation,
whichever comes first.
• Overhaul and Check Fuel Feed Pump
• Clean Engine Oil Cooler
• Clean Seawater and Engine Coolant
System
• Replace Rubber Fuel Hoses
Overhaul and Check Fuel Feed
Pump
Fuel feed pump must be overhauled and
checked to ensure optimal engine
performance.
This maintenance requires specialized
knowledge. See your authorized Yanmar
Marine dealer or distributor to overhaul and
check the fuel feed pump.
Clean Engine Oil Cooler
Rust and scale are deposited inside the
seawater system during long use. These
deposits lower cooling performance, so it is
necessary to clean and maintain the engine
oil cooler.
See your authorized Yanmar Marine dealer
or distributor to clean the engine oil cooler.
© 2008 Yanmar Marine International
PERIODIC MAINTENANCE
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