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ENGINE ADJUSTMENTS
NOTE: WESTERBEKE recommends that the following engine adjust·
ments be perfonned by a competent engine mechanic.
The
information
below is provived to assist the mechanic.
DRIVE BELT ADJUSTMENT
For your safety,
WESTERBEKE
generator models come
equipped with belt guards that cover over the belt(s) on the
front of the engine. ("Out of sight- out of mind." The belt
guard is NOT mstalled for that purpose.) Operators are
advised
that
proper inspection, service, and maintenance is
required.
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 drive belt
is
properly adjusted if the belt
can
be
deflected no less than
3/8
inch
(10mm)
and no more than
1/2
inch
(12mm) as
the belt is depressed with the thumb at the
midpoint between the two pulleys on the longest span of the
belt
A
spare belt or 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.
Adjusting
8elt Tension
1. Remove the belt guard.
2.
Loosen the-alternator adjusting strap bolt and the base
mounting bolt.
3. With the belt loose, inspect for wear, cracks, and frayed
edges.
4. Pivot the alternator on the base mounting bolt to the left
or right as
required,
to loosen or tighten.
5. Tighten the base mounting
bolt
and the adjusting strap
bolt.
6. Operate the generator for about 5 minutes then shut down
and recheck the belt tension.
7. Replace the guard.
TORQUING THE CYUNDER HEAD BOLTS
After the initial break-in period (approximately 50 hours) and
every 500 hours thereafter, the cylinder head bolts should be
re-torqued.
Tighten the cylinder head bolts according to the sequence
shown. Make sure the engine is cold when this is done.
Before applying the specified torque to the bolt, loosen it
1/4
to
1/2
of a
tum
and then apply the torque. Follow this
procedure according
to
the numbered sequence shown in the
illustration to the right.
Bolts #1, 2 and
3; (12mm
socket)
14-22
ft-lb
Bolts #4, 5, 6, 7, 8, 9,10 and 11
(14mm
socket)
(54
-61
ft~lb)
Rocketshaft Hold Down Bolts-
12mm
socket
{11-
16 ft-lb)
Rocker Cover Hold Down Cap Nuts-
(10mm
socket) (snug)
CRINDER HEAD BOLT PAnERN
FUEL INJECTORS
In case of severe vibrations and detonation noise, have the
injectors checked and overhauled by an authorized fuel
injection service center. Poor fuel quality, contaminant's and
loss of positive fuel pressure to the injection pump can result
in injector faults. Since fuel injectors must be serviced in a
clean room envir9nment, it is best to
carry
at
least one
extra
injector
as
a spare should
a
problem occur.
Before removing the old injector, clean the area around the
base of the injector
to
help prevent any
rust
or
debris
fiom
falling down into the injector hole. If the injector will not lift
out easily and is held in by carbon build-up or the
like,
work
the injector side-to-side with the aid of the socket wrench to
free
it, and then lift it out.
·
The injector seats in the cylinder head on a copper sealing
washer. This washer should be removed with
the
injector and
replaced with a new washer when the new injector is
installed.
.
INJECTOR TO CYUNDER HEAD TIGHTENING TORQUE
40
±
4 ft-lb (5.5
±
0.5 kgf-m)
Engines
&
Generators
22
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