Engine Adjustments; Speed Hertz Adjustmenl; Torquing The Cylinder Head Bolts - Westerbeke 4.5KW BCGB-60HZ Operator's Manual

Gasoline, single phase generators
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ENGINE ADJUSTMENTS
NOTE:
WESTERBEKE recommends that the following
engine adjustments be peifonned
by
a competent engine
mechanic. The information below is provided to assist the
mechanic.
ENGINE SPEED (HERTZ) ADJUSTMENT
Governor
The belt-driven, mechanically operated governor maintains
the engine's rpm under various load conditions. Engine speed
determines the hertz and voltage output of the generator.
Governor Adjusbnents
Operate the generator to bring the unit up to operating tem-
perature before adjusting the governor.
NOTE:
lfthe governor is severely out of adjustment, manually
adjust the linkage at no-load to obtain a safe output voltage
before proceeding with the adjustment.
There are three adjusting points on the governor (see illustra-
tion).
1. IncreaselDecrease Speed Adjustment. This adjusting bolt
sets the no-load speed of the engine. (The linkage arm
between the governor arm and throttle lever should be
adjusted to hold the throttle full open when the engine is
not running.) Make sure this linkage moves freely and
that the ball joint connectors are properly lubricated. Use
graphite lube for this purpose. Disconnect the ball joint
and apply graphite lube to the inside of the joint.
2. Hunting/Regulation Adjustment. If the variation in
engine speed between no-load and full-load is too great,
adjust this eye bolt to draw the spring closer to the lever
hub. The increase/decrease speed bolt may need to be
adjusted as well.
If the governor surges under load, adjust this eye bolt to
move the spring away from the lever hub (check speed
adjustment).
3. Bumper Screw Adjustment.
This screw is used to remove
a no-load surge ONLY. NEVER turn the bumper screw
into the governor so far that
it increases the no-load speed.
LINKAGE
GOVERNOR
FILL
Governor Maintenance
1. Periodically lubricate the linkage arm attaching points at
the governor arm and throttle lever. Use a graphite
lubricant or equivalent.
NOTE:
Free movement of this linkage arm is imponantfor
proper governor/throttle operation.
2. Governor oil capacity -
3 ounces 10/30 engine oiL
NOTE:
Do not overfill the governor.
3, Change the governor oil every 250 hours of operation.
To change the oil, remove the governor from the engine,
remove the oil fill and the fill level plug, and drain all the
oil. Reinstall on the engine and fill with 3 ounces of 10/30
engine oil. Replace the plugs.
4, Periodically adjust the governor belt tension (see DRIVE
BELTS ADJUSTMENT). Since belts stretch slightly, this
stretching
will,
to some degree, affect the gavenor's
action.
TORQUING THE CYLINDER HEAD BOLTS
After the initial break-in period (approximately 50 hours). the
cylinder head bolts should be re-torqued.
Tighten the cylinde:r head bolts according to the sequence
shown. Make sure the engine is cold when this is done, and
loosen one head bolt one-half turn and then tighten it
between 43 - 51 lb-ft (60 - 70 Nm). Then proceed to the next
head bolt in the sequence. Tighten the RS (rocker cover stud)
securely.
FRONT OF...-..-.,
ENGINE
~
6
4
2
INTAKE SIDE
BUMPER SCREW
LEVER
HUNTING
ADJUSTMENT
SPEED ADJUSTMENT
(UNDER)
8
1
Engines
&
Generators
26
7
5

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