4. Maintenance & Inspection
of
the
earth
cable. Otherwise, a
short-
circuit
could
cause
a fire.
Ensure
good
ventilation
when
charging
the
battery.
The
use
of
open
flames
is
strictly
prohibited.
Hydrogen
gas
may
also
catch
fire.
Battery
fluid
is
diluted
sulfuric
acid.
It
can
blind
you
or
burn
your
eyes
or
skin.
Wear
goggles
and
gloves
when
handling
battery
fluid.
Should
the
fluid
be
deposited
on
your
skin,
wash
with
a
large
quantity
of
fresh
water
and
seek
treatment
from
a
doctor.
1}
If
operation continues with insufficient
battery fluid, the battery will be destroyed.
Check the fluid level periodically.
If
the
level
is
lower than specified, resupply
battery fluid (available in the market) up to
the upper limit
of
the battery.
(Battery
fluid tends
to
evaporate
in
high
temperatures,
especially
in
summer.
In
such cases, inspect the battery earlier than
specified.)
2}
If
the engine speed will
not
rise and the
engine cannot be started, measure the
specific gravity with
a pycnometre (avail-
able in the market).
The specific gravity
of
the fluid when fully
charged is over 1.27(at 20°C).
Fluid
with a specific gravity of below 1.24
needs charging.
If the specific gravity
cannot be raised by charging, the battery
must be
replaced.
NOTICE
The
capacities
of
the
standard
alternator
and
the
recommended
battery
assume
only
the
power
necessary
for
regular
operation.
If
the
power
is
also
used
for
inboard
lighting
or
other
purpos-
es,
the
generating
and
charging
capacities
may
be
insufficient.
In
such
cases,
consult
your
Yanmar
dealer
or
distributor.
4.3.3
Inspection
Every 150
hours.
Replace the engine oil and the clutch lube
oil.
After the second oil change, the engine oil
should
be replaced after every 150 hours.
4.3.4
Inspection
Every 300 Hrs.
(1)
Replacing
the
Fuel
Filter
When there
is
dirt
in
the fuel, the filter be-
comes
clogged, and the fuel will not flow
easily.
Check and replace the inside
element.
1.
Close the fuel cock.
2.
Remove the filter case by loosening the
retainer ring (turn
to
the left) with the
filter wrench.
3.
Pull the element out from the bottom,
and
replace with a new one.
4.
Clean the inside of the case thoroughly,
put on the O-ring, and close with the
retainer ring. (Turn
to
the right.
Tightening torque: 12
Nm)
5.
Air will enter into the fuel system when
the
filter
is
disassembled, and should
be vented. (See 3.3.2(3))
(2)
Adjusting
the
Tension
of
the
Cooling
Water
Pump
Driving Belt.
When there is not enough tension in the V-
belt, it will slip and the cooling water pump
will fail
to
supply cooling water. Engine
over-heating and seizure
will result.
37
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