ENGINE
ADJUSTMENTS
ADJUSTING
THE
DRIVE.
BELT
The engine's drive belt is located under the engine. To
access the belt, for inspection and/or adjustment, remove
the cover as shown. Inspect the belt for wear along the edges
and for proper belt tension (belt should
be
tight).
The belt tension can be checked
by
meassming the
spling length. 11/4ln
(31.79mm)
r-~
-r->=:::::::µ..
To
set the spring tension at 1-1/4", release the
jam
nut and
use a rod such
as
an allen wrench to
tum
the adjusting: nut (as
shown) to tighten or loosen the spring tension, which in tum
adjusts the tension
on
the belt.
COVER
.
IT
IS
NORMAL
FOR
SOME
BELT
DUST
TO
ACCUMULATE
IN
THE
ENGINE
PAN,
SIMPLY
WIPE
CLEAN
BElT
ASSEMBi:.Y VIEWED
FROM
BELOW
*
IMPORTANT:
REFER
TO
THE
WESTERBEKE
SERVICE
BULLETIN
(LAST
PAGE
IN
THIS
MANUAL)
FOR
THE
ADDITION
OF
A
SPACER
ON
THE
3.0BCG
MODEL.
SHEAVE
ARRANGEMENT
VIEW
FROM
UNDER
BASE
FRAME
The Iub1icating system is a pressure feeding system using an
oil pump.
The
engine oil is drawn from the oil sump by the
oil pump, which drives the oil, under pressure, through the
oil filter and various lubricating
paits in the engine. The oil
then returns to the oil
sump
to repeat the continuous cycle.
When the oil pressure exceeds the specified
prei;sure, the oil
pushes open the relief valve in the oil pump and returns
to
the oil sump, keeping the oil pressure within it's specified
range.
TESTING
OIL
PRESSURE
To
test
the.
oil pressure, remove the oil switch and install a
mechanical oil pressure gauge in it's place, it will be
necessary to
·connect the two switch wires -together for the
engine to run. After warming up the engine, with
tlie engine
speed at
2200 rpm, read the oil pressure gauge.
Oil
PRESSURE:
between
30
and
40
psi
at
2200
rpm
NOTE:
A newly starter (cold) engine
may
have
an
oil
pressure
up
to
40
psi. A wanned engine can
have
an
oil
pressure
as low
as
30
psi.
Oil pressure will
Val)I
depending
on
the
load placed on
the
generator.
OIL
PRESSURE
SWITCH/SENSOR
The generator is fitted with an oil pressure shutdown
switch. Should the engine's oil pressure drop below the safe
minimum, the switch will shut the engine down to prevent
damage by interrupting the
DC
voltage to the ignition coil.
NOTE:
77w
specified minimum oil pressure
is
5
psi.
A
gradual
loss
of
oil pressure usually indicates
worn
bearings.
For
additional information
on
low oil pressure
reading.1~
see
the
ENGINE TROUBLESHOOTING
chart.
lw,WESTERBEKE
Enaines & Generators
'25.
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