Installation manual
ENGINE
ADJUSTMENTS
NOTE:
WESTERBEKE
recommends
that
the
following
engine
adjust-
ments
be
performed by a competent
engine
mechanic.
The
information
below is provided
to
assist the
mechanic.
ENGINE
IDLING
SPEED
The engine idling speed
is
pre-set
at
the
factory but
once
the
boat
is operating
in
the
water other variables such
as
pro-
peller
size,
shaft length,
and
the
transmission
can
affect
the
idle
speed.
The
normal idle speed
for
these engines is 650-950
RPM,
however,
simply
put,
the
idle speed should feel comfortable.
It should
be
quiet
and
smooth, not racing but not
so
low
that
it causes transmission damper plate
chatter.
SETTING
THE
IDLING
SPEED
To
adjust
the
engine idle
speed
(engine
running),
loosen
the
locknut
of
the
idle adjustment bolt
and
tum the bolt
clockwise
to
increase idle
speed
and
counterclockwise
to
reduce.
Once
the
speed
is set
to
your satisfaction,
tighten
the
locknut.
FUEL
INJECTION
PUMP
(TOP)
ENGINE
COMPRESSION
Check the compression pressure.
To
do this, warm
the
engine?
remove all
fuel
injectors, or glow plugs, disconnect
the fuel shut-off solenoid wire, and install a compression
adapter in the injector hole or glow plug hole. Connect a
compression tester on the adapter and crank the engine with
the
starter motor until the pressure reaches a maximum value.
Repeat this process for each cylinder. Look for cylinders
with
dramatically (at least 20%) lower compression
than
the
average
of
the others. Compression pressure should not differ
by
more than 42.7 psi (3.0 kg/cm
2
)
at 200
rpm.
COMPRESSIO.
GAUGE!
INJECTION
PUMP
SERVICE
For
disassembly,
inspection,
reassembly
and
internal
adjustments
of
the
injection
pump,
it
is
recommended
the
pump
be
taken
to
a
qualified
injection
service
shop
authorized
to
service
Diesel
KiKi or
Zexel
injection
equipment.
ENGINE
STOP
SOLENOID
This
solenoid
is
insralled
on
the
top
rear of
the
injection
pump
and
is
activated
by
12
VDC
electrical
current.
Troubleshooting
1.
The
solenoid does
not
operate when
the
keyswitch
is
turned
"ON".
a.
Are
the
engine
batteries turned "ON"?
b.
Is
the
20
amp
circuit breaker
set?
c.
Is
12
VDC
present at
the
solenoid
connection
?
2.
The
solenoid does not stop
the
engine when ~
..---SPRING
the
keyswitch is switched ''OFF'', r
a.
Check
to
see
if
12
VDC
is still present
t-
PLUNGER
at
the
solenoid
electrical lead
with
the
key
off.
b.Remove
solenoid
from
injection
pump
and
ensure
plunger
and
spring
in
the
solenoid
are
not sticking.
If
a weak cylinder is flanked by healthy cylinder,
the
problem
is either valve or piston related. Check the valve
clearances
for the weak cylinder, adjust
as
needed
and
test again.
If
the cylinder is still
low,
apply a small amount of
oil
into
the cylinder to seal the rings and repeat
the
test
If
compression comes
up
- the rings are
faulty.
Engines & Generators
43