5. MAINTENANCE &
INSPECTION
Conduct Periodic
Inspection
for Your
Safety.
The
functions of engine components will degenerate and engine performance will fall
according
to the use of the engine. If periodic inspections are not performed, you may
encounter unexpected troubles while cruising at
sea,
and consumption of fuel or lube oil may
become
excessive
and exhaust gas and engine noise may
increase.
These all shorten the life
of the engine.
Daily
and periodic inspection and servicing increase your safety operation.
Inspect
Before
Starting.
Make
it a daily rule to inspect before starting.
—See
[4.1 Inspection Before Starting]
Monitor
the hour
meter
and conduct periodic inspections.
Keep
a daily record of operation and maintenance. When the time for an inspection^
approaches,
study the relevant pages in the Operation
Manual.
Inspections should be ma^
after every
50,
250(or
1
yr.), 500 (or 2 yrs.), 1000(or 4 yrs.), and 2000 hours of use.
Monitor the hourmeter and conduct periodic inspections according to the procedures
described
in this Operation
Manual.
Use Genuine Parts.
Be
sure to use genuine parts for consumable and replacement parts.
Use
of other parts will reduce engine performance and shorten the life of the engine.
Servicing
Tools :
Prepare
servicing tools onboard to be ready for inspecting and servicing the engine and other
equipments.
Tightening
Torque
of
Nuts
& Bolts
Over-tightening of bolts and nuts
causes
them to come off or their threads to be damagecL
Insufficient tightening
causes
oil leakage from the installation face or troubles due to t^
loosening
of bolts. Nuts and Bolts must be tightened to the appropriate tightening torque.
Important
parts must be tightened
with
a torque wrench to the correct tightening torque and in
the
right
order. Consult
with
your dealer or distributor if the servicing requires the removal of
such
parts.
The
tightening
torque
for
standard
nuts
&
bolts
is
listed
below:
r
[NOTICE3-
'7"
on the
head.
# Apply the following tightening torque to bolts having
(JIS strength classification : 7T)
O
Tighten bolts
with
no "7" mark to 60% tightening torque.
O
If the parts to be tightened are made from aluminum alloy, tighten the bolts to
80%
tightening torque.
Bolt
dia.
x pitch mm
Tightening torque
M
6x1.0
10.8±1.0
(l.ldtO.I)
M8X1.25
25.5±:2.9
(2.6±:0.3)
M10X1.5
49.0±4.9
(5.0±0.5)
M12X1.75
88.3±9.8
(9.0±1.0)
M14X1.5
137±:9.8
(14.0±1.0)
M16X1.5
226±9.
(23.0±1.
f
-42-
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