Major Servicing Parts - Yanmar 2GM20(F)(V)(C) Operation Manual

2. Product explanation
2.4 Major Servicing Parts
Name of part
Decompression lever
Fuel filter
Fuel feed pump,
Priming lever
Function
xhaust valve and releases the pressure for manual starting. Opens thee
Removes d
internal elem
ust and water from fuel. Drain the filter periodically. The
ent (filter) should be changed periodically.
-
the fuel injection pump. Moving the priming Feed fuel to
lever up and
is used to b
down feeds the fuel. When there is no fuel, the priming lever
leed air from the fuel system.
Filler port (engine) Filler port fo r eng1ne lube oil.
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Filler port (marine gear) Filler port fo r marine gear lube oil.
Lube oil filter Filters fine m
etal fragments and carbon from the lube oil.
Filtered lube
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oil is distributed to the engine's moving parts.
Cooling Water System
Seawater cooling
Anticorrosion zinc
Fresh water cooling
Fresh water pump
Fresh water coolmg
Filler cap
wo types of cooling systems: direct seawater cooling There are t
fresh water cooling.
and
er pump feeds seawater. The flow is controlled automatically The seawat
by a thermo stat which measures the temperature during operation.
area of the seawater cooling system is prone to electrical
he anticorrosion zinc is Installed in the cylinder block and/or
The metal
corrosion. T
d to prevent this. The anticorrosion zinc is Itself reduced over
ctrical corrosion, so It must be replaced at fixed intervals
ompletely consumed In order to ensure that the metal area of
r cooling system remains fully protected.
cylinder hea
time by ele
before It is c
the seawate
o cooling systems: fresh water and seawater. There are tw
The fresh wa
The fresh w
water pump
ter pump is run by the alternator and the V-belt.
ater in the fresh water cooler is fed to the engine by the fresh
. The cooling fresh water returns to the eng1ne after it is
cooled with seawater in the fresh water cooler.
on the cooling water tank covers the water supply port. The
ressure regulating valve. When the cooling water temp. rises,
rises inside the fresh water cooler.
The filler cap
cap has a p
the pressure
______
__:__
Subtank
Fresh water pump
Intake air silencer
Name plate
Starter
Alternator
16
e regulating valve releases vapor and hot water overflow to The pressur
the subtank
onnects the filler cap and subtank. Vapor and hot water The hose c
discharged
engine stop
tank also dr
back from th
to the subtank return there to the cooling water. When the
s and cooling water cools, the pressure In the cooling water
ops very low. The fi ller cap valve then opens to send water
e subtank. This min1mizes cooling water consumption.
gal water pump circulates fresh cooling water inside the The centrifu
engine. The
pump is on
pump and alternator are dnven by the V-belt. The fresh water
engines using fresh water cooling.
This is the a
and reduces
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lr Intake silencer. The silencer guards against dirt in the air
the noise of air intake.
s are provided on the engine and the marine gear and have Name plate
the model, s
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erial number and other data.
Starter moto r for the engine. Powered by the battery.
Rotates by b elt drive, generates electricity and charges the battery.