Specifications
ENGINE
ADJUSTMENTS
SPARK
PLUGS
The spark plugs should be cleaned and re-gapped after the
first
50
hour break-in period, then inspected every 250 hours
thereafter and replaced
as
needed.
A
WARNING:
Do
not
remove
the
spark
plugs
while
the
engine
is
hot.
Allow
the
engine
to
cool
before
removing
them.
SPARK
PLUG
GAP:
0.031
-
0.002in.
(0.8ยท
0.7mm).
SPARK
PLUG
TORQUE:
11
-15
Ib-fl
(1.5
-2.31
kg-mI.
NOTE:
!.octite Anti-Seize applied
to
the threaded portion
of
the spark plugs will
retard
corrosion,
making future
removal
of
the
spark plugs
easier.
CHECK
FOR
DETERIORATION
~
INSPECTING
THE
SPARK
PLUGS
CHECK
FOR
CARBON
~BUlLD
UP
AND
BURNING
- i
GAP
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.
CHECKING
RESISTANCE
DRIVE
BELT
ADJUSTMENT
The drive belts 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.
The
22.5Kw
and
20Kw SBEG generators have
two
drive
belts, one drives
the
governor and alternator and the other
drives the
raw
water
pump.
The tension adjustment
procedure
for
both belts
is
as
follows:
A
WARNING:
Never
attempt
to
check
or
adjust
the
drive
belt's
tension
while
the
engine
is
in
operation.
1.
Remove
the
belt
gUard.
2.
To
adjust the governor drive belt, loosen
the
two
governor
mounting bolts.
To
adjust the
raw
water pump/fresh water pump drive
belt, loosen the
two
raw
water
pump
mounting
bolts.
3.
With
the belt(s) loose, inspect
for
wear,
cracks,
and
frayed
edges,
and
replace if
necessary.
4.
To
loosen or tighten
the
governor drive belt,
slide
the
governor in or out
as
required, then retighten its mounting
bolts.
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.
5.
The drive belts
are
properly adjusted if it can
be
deflected
no
less
than
3/8 inch (lOmm) and
no
more
than
1/2
inch
(l2mm)
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
221b
pressure
to
the
belt's outer face for
proper belt operation.
Spare
belts should always
be
carried
on
board.
6. Operate the generator
for
about 5 minutes
then
shut
down
and
recheck
the
belt(s) tension.
7.
Replace the belt
guard.
Engines & Generators
22