Westerbeke 12.5 BTDA - Engine Adjustments; Glow Plugs Inspection and Testing; Fuel Injector Service

ENGINE ADJUSTMENTS
NOTE: WESTERB$KE recommends that the following engine adjust-
ments be performed by a competent engine mechanic. The it:tformation
below is provided to assist the mechanic.
GLOW PLUGS
TYPICAL
DESCRIPTION
The glow plugs are wired through the preh~tsolenoid.
When PREHEAT is pressed at the control panel this solenoid
should "click;' on and the glow plug should begin to get hot.
INSPECTION
To inspect the plug, remove the electrical teri:ninal connec-
tions, then unscrew or unclamp each plug from the cylinder
head. Thoroughly clean each plug's tip and 'threads with a
soft brush and cleaning solution to.remove all the carbon and
oil deposits. While cleaning; examine the tip.fOI' wear and
burn erosion; if it has eroded too much, replace the plug.
TESTING
An accl}rate way to test glow plugs is with an ohmmeter.
Touch one prod to the glow plug's wire connection, and
the other to the body of the glow plug, as shown. A good
glow plug will have a 1.0- to 1.5-ohm resistance. This
method can be used with the plug in. orout of the e~gine.
You can also use an ammeter to test thepower drain
(8 to 9 amps per plug).
A WARNING: These glow plugs Will become very hot
to the touch. Be careful not to burn your fingers When
testing the plugs
Re-instalJ the plugs in the engine and test them again. The
plugs should get vety hot (at the tertninal end) within 20.to
25 seconds, If the plugs don't heat up quickly, check for a
short circuit. When reinstalling the glow plugs; use anti-seize
compound on the threads.
Glow Plug Tightening Torque 7 ·11 lb·ft (1.0 ·1.5 kg·m)
A WARNING: Do not keep a glow plug on for more ·
than 30 seconds
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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, contaminants 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 enviroment, 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 from
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 Cylinder Head Tightening Torque· 40 ± 4 ft·lb (5.5 ± 0.5 kgl·m)
FUEL INJECTOR
REFER to YOI.JR WESTERBEKE SERVICE MANUAL
FOR TESTING AND SERVICING OF FUEL INJECTORS.