ENGINE
ADJUSTMENTS
SPARK
PLUGS
The
spark
plugs
should
be
cleaned
and
re-gapped after the
first
50
hour
break-in period. Then refer
to
the Maintenance
Schedule
in
this
manual
and Specification Section for spark
plug
gap.
NOTE:
It
is
important
to
maintain spark plugs
in
a proper .
operating
condition.
They
are
an
important component
in
the
ignition
system
in
lowering
carbon monoxide
levels.
SPARK
PLUG
GAP:·
0.028
•
·0.031in.
(0.7
•
O.Bmm}
SPARK
PLUG
TORQUE:
11
•
15./b·ft.
(1.5
•
2.31
kg-m)
INSPECT
FOR
WEAR
&
CARBON
INSPECTING
THE
SPARK
PLUGs
INSPECT
FOR
DAMAGE
,.._____CHECK
FOR.
DETERIORATION
AND
DAMAGE
NOTE:
Loctite
Anti-Seize
applied
to
the
threaded portion
oj
the
spark
plugs
will"
retard
corrosion,
making
future
removal
of
the
spark
plugs
easier.
HIGH
TENSION
CORDS
(IGNITION
WIRES)
Check
the ignition
wires
every 500 operating hours
as
engine
compartment
heat
can
deteriorate the wires.
Check
the
resistance·
of each wire.
Do
not
pull
on the wire
because
the
wire
connection inside
the
cap may become
separated
or
the
insulator
may
be
damaged. When removing
the
wires
from
the
spark plugs, grasp and twist the moulded
cap,
then
pull
the
cap
off
the
spark
plug.
The resistance value
is
410
ohm
per
inch
of
wire.
DRIVE
BELT
ADJUSTMENT
The drive belt must be properly tensioned. Excessive
drive
belt tension
can
cause rapid wear
of
the belt
and
reduce
the
service life of the fresh water pump's bearing. A slack belt
or
the presence of oil
on
the belt can cause'belt slipping,
resulting in high operating. temperatures.
1. Remove
the
belt guard.
2.
To
adjust the raw water pump/fresh
water
pump
drive
belt, loosen the
two
raw water pump mounting
bolts.
With
the
belt: loose, inspect for
wear,
cracks, and
frayed
edges,
and replace
if
necessary.
3.
To
loosen or tighten the raw water pump/fresh water
pump drive belt, slide the raw water pump
in
or
out
as
required, then retighten its mounting bolts.
4. The drive belt are properly adjusted if it
can
be
deflected
no
less than
3/8
.inch
(lOmm) and
no
more than.li2
inch
(12mm)
as
the belt is depressed with
the
thumb
at
the
midpoint between the two pulleys
on
the
longest
span
of
the belt.
NOTE:
Maintain a 22lb pressure
to
the
belt's outer
face
for
proper belt operation. Spare belts should
always_
be
carried on
board.
A
WARNING:
Never
attempt
to
check
or
adjust
the
drive
belt's
tension
while
the
engine
is
in
operation.
5. Operate the generator for about 5 minutes,
then
shut
down
the generator and re-check the belt tension. Replace
the
belt guard.
43
RAW
WATER
PUMP
PULLEY
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