Adjusting Idle Speed; Drive Belt Adjustment - Westerbeke 8.0KW-60Hz Service Manual

ENGINE ADJUSTMENTS
ADJUSTING THE IDLE SPEED
a. Loosen the locknut on the idle adjustment bolt on the
fuel injection pump.
b. Adjust the bolt so that the throttle control lever will
hold the engine at a quiet idle. [750 - 1000 RPM]
c. Tighten the locknut.
d. Race the engine several times to ensure the idle speed
remains as set.
NOTE:
Should the engine rpm be in question. verify the
tachometer readings as shown at the instrument panel
with a mechanical or strobe-type tachometer at the engine
crankshaft·
IDLE ADJUSTMENT BOLT
THE HIGH SPEED
ADJUSTMENT IS FAC'TnllYt
SET.
STOP CONTROL CABLE
r<.,"".,<
STOP
.//I"'~
POSITION CABLE SO THAT THE
STOP CONTROL WILL SHUT THE
ENGINE DOWN.
Fuel Shutoff Solenoid [Optional]
The optional fuel shutoff solenoid allows the engine to be
shut down using the instrument panel key switch. The
solenoid has been factory set and does not require
adjustment. Refer to the assembly procedure of the fuel
shutoff solenoid for the proper setting and clearance of the
plunger. See FUEL SHUTOFF SOLENOID INSTALLATION.
Drive Belt Adjustment
Proper inspection, service and maintenance of the drive belts
is important for the efficient operation of your engine.
Drive belts must be properly tensioned. Loose drive belts
will not provide proper alternator charging and will
eventually damage the alternator. Drive belts that are too
tight will pull the alternator out of alignment andJor cause
the alternator to wear out prematurely. Excessive drive
belt tension can also cause rapid wear of the belt and
reduce the service life of the coolant pump's bearing. A
slack belt or the presence of oil on the belt can cause belt
slipping, resulting in high operating temperatures and
tachometer variations.
The drive belt is properly adjusted if the belt can be
deflected no less than 3/8 inch (lOmnn) 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 Belt Tension
a. Loosen the alternator adjusting strap bolt and the base
mounting bolt.
b. With the belt loose, inspect for wear, cracks and frayed
edges.
c. Pivot the alternator on the base mounting bolt
to
the
left or right as required, to loosen or tighten.
d. Tighten the base mounting bolt and the adjusting strap
bolt.
e. Run the engine for about 5 minutes, then shut down
and recheck the belt tensions.
Engines & Generators
51