Fuel Injection Timing - Westerbeke 11.5KW-60Hz Service Manual

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FUEL INJECTION TIMING
Preparation
Adjustment
a. Close the fuel shut-off valve.
b. Disconnect the No.1 fuel injection pipe from the
cylinder head and injection pump.
c. Remove No.1 delivery valve holder from the injection
pump. Remove the delivery valve and spring from the
holder. Restore the delivery valve holder only to the
a. If the fuel injection timing is incorrect, change the
thickness of shims under the fuel injection pump. An
increase or decrease of the shims by O.lmm (0.004 in)
will vary the timing by 1°.
b. Increase the thickness of the shims to retard the timing
or decrease it to advance the timing.
injection pump.
ADJUSTMENT RANGE: STANDARD
±
1.5'
d. Connect the fuel injection pipe to the injection pump.
e. Hold the speed control lever in the low speed position.
(Generator) remove the fuel shut-off solenoid.
Inspection [fuel flow method)
a. Open the fuel shut-off valve.
Thrn
the, key switch to the
ON position and press preheat.
NOTE: Fuel will come from the injection pipe with high pres-
sure when the starter switch key is turned to ON position
if
the engine,,;s equipped with an electric fuel pump. Direct fuel
flow into the container.
b. Slowly
turn
the crankshaft clockwise, looking at the
open end of the injection pipe. The instant fuel stops
coming out is the fuel injection timing.
NOTE: Turn the crankshaft in reverse direction just a little and
do step b again to verify the injection timing.
c. The fuel injection timing is correct if the IT mark on the
crankshaft pulley is aligned with the mark on the timing
gear case when fuel stops from the injection pipe.
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FUELFLOWS' -
. Alternate method
In the fuel flow method, the delivery valve has to be removed.
As a result, there is a good chance for
dirt particles to get
inside the fuel injection pump. In this alternate method, how-
ever, it is not necessary to remove the delivery valve.
a. Disconnect No.1
fu~~injection
pipe at the fuel
" injection nozzle (cylinder head). '
b. Prime the fuel system. '
c. Slowly
turn
the crankshaft clockwise until fuel just
swells at the free end of the injection pipe and, at that
instant, check the position of the IT mark with respect
to the mark on the gear case. This timing is
approximately l' retarded. Take this l' retardation
into account when making a shim adjustment.
FoUr
kinds
of shims are available in thicknesses
0.2mmm (0.0079 in), 0.3mm (0.0118 in), O.4mm
(0.0157 in) and 0.8mm (0.0315 in). These shims have
no identification, measure the thickness of each shim
with calipers before using it.
A
CAUTION:
Apply sealant to both faces of each
shim to prevent oil leaks.
c. After the timing has been adjusted, make sure it is
correct.
d.Close the fuel filter valve and restore the delivery valve
and injection pipe to the original state.
TDCMARK
ANGLE BY WHICH FUE[\
INJECTION TIMING
""-Iv'
"-ct5
17° 190
,I
,20' '
23'
ANGLE BY WHICH FUEL
INJECTION TIMING
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Engines & Genera/ors
39