Every 2000 Hours Of Operation; Overhaul And Check Fuel Feed Pump; Clean Engine Oil Cooler; Clean Seawater And Engine Coolant System - Yanmar 6LY3 series 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.
Clean Seawater and Engine
Coolant System
Rust and scale are deposited inside the
seawater and engine coolant system
during long use. This lowers cooling
performance, so it is necessary to clean
and maintain the following parts in addition
to replacing the coolant.
6LY3 Operation Manual
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PERIODIC MAINTENANCE
Relevant Coolant System Parts:
Seawater pump, engine oil cooler,
aftercooler, fresh water pump, fresh water
cooler, thermostat, etc.
See your authorized Yanmar marine dealer
or distributor to clean the seawater and
engine coolant systems.
Replace Rubber Fuel Hoses
Rubberized fuel hoses tend to dry out and
become brittle after 2000 hours or 8 years
of engine operation (whichever comes
first).
See your authorized Yanmar marine dealer
or distributor to replace the rubber fuel
hoses.
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