Spark Plugs; Choke Solenoid; Ignition Wires - Westerbeke 4.5 BCG Operator's Manual

ENGINE ADJUSTMENTS
SPARK PLUGS
The spark plugs should be cleaned and regapped after the
first 50 hour break-in period, then inspected every 250 hours
thereafter and replaced as needed.
A
WARNING:
Do not remove the spark plugs while
the engine is
hot.
Allow the engine to cool before
removing them.
Spark plug gap: 0.031 - ± 0.0002 in. (0.8 - 0.05 mm).
Spark plug torque: 10 -15 lb-ft (1.5 - 2.31 kg-m).
NOTE:
wctite Anti-Seize applied to the threaded ponion of
the spark plugs will· retard corrosion, making fature removal
of the spark plugs easier.
GAP
INSPECT FOR
WEAR & CARBON
INSPECTING
THE SPARK
PLUGS
INSPECT FOR
DAMAGE
:--____CHECK FOR
DETERIORATION
AND DAMAGE
HIGH TENSION CORDS (IGNITION WIRES}
Check the ignition
wire~
every 500 operating hours as engine
compartment heat can deteriorate the wires.
Check the resistance of each wire. Do not pull on the wire
because the wire connection inside the cap may become
seperated or the insulator may be damaged. When removing
the wires from the spark plugs, grasp and twist the moulded
cap, then pull the cap off the spark plug.
The resistance value is 410 ohm per inch of wire.
CHECKING
RESISTANCE
CHOKE SOLENOID
The choke solenoid is a 12 volt DC operated unit that func-
tions to close the choke plate in the carburetor when the ON
switch is depressed during engine start-up.
The choke solenoid de-energises once the engine starts and
the ON switch is released. Some unstable running may be
present when the engine starts cold but should smooth out as
the engine reaches operating temperature.
Keep this solenoid dry and periodically lubricate the linkage
between the solenoid and the choke lever.
CARBURETOR
Engines & Generators
29