Injection Timing - Westerbeke 5.0KW BCD Operator's Manual

ENGINE ADJUSTMENTS
NOTE:
WESTERBEKE recommends that the following engine adjust-
ments. be perfon:nf!d by a competent engine mechanic. The information
below is
p~ov~ded ~o
assist the mechanic.
Injection Pump Timing Adjustment (Spill Timing)
If your engine's fuel injection timing is not properly adjusted,
the engine will not operate properly, and may be difficult to
start. Have the injection pump delivery rate checked by a
well-established fuel injection shop. Adjust the injection as
follows:
NOTE:
The injection pump fuel rack needs to be in the full
fuel delivery position when peiforrning this spill timing. To
do this, unscrew the fuel shut off solenoid and remove the
side cover to expose the injection pump fuel rack. Manually
move the fuel rack to the full fuel delivery position (move
fully to the left) secure it in this position then proceed.
1.
Remove the high pressure fuel line from between the
No.1 injector and the No.1 fuel delivery valve holder.
2. Remove the No. 1 fuel delivery valve holder over
"0" ring and remove the delivery valve spring beneath
the holder.
3. Reinstall only the delivery valve holder and reattach the
high pressure fuel line to the delivery holder. Attach it so
that the end that would connect
to
the fuel injector is
pointing away from the engine fuel will flow from this
line during the timing check.
Rotate the engine's crankshaft in its normal direction of
rotation to position piston the No. 1 at the beginning of its
compression stroke.
Connect DC power to the electric
lift
pump. Slowly rotate
the crankshaft clockwise (as viewed from the front), catching
the fuel from the No. 1 fuel line, until the instant the fuel
completely stops flowing (no drips). At this instant, the
16° BTDC timing mark on the crankshaft pulley should be
directly aligned with the timing indicator on the front of the
gear case ± .5 degrees.
If the specified injection timing (16
0
BTDC) cannot be
attained, adjust the timing by increasing or decreasing the
thickness of shim material under the injection pump's
mounting flange
to
change the injection timing point.
Changing the shim thickness by
0.004
inch (O.Olmm)
changes the injection timing by approximately one degree.
To advance the tirriing, decrease the shim thickness, as
required. To retard the timing, increase the shim thickness, as
required. Refer to your Generator's Parts List for shim part
numbers.
NOTE:
The timing for models BCD and BCDA is 18°.
IT MARK
ON PULLEY
DELIVERY
VALVE
H
BARREL.
PLUNGER
CONTROL
PINION GEAR
PLUNGER
TIMING POINTER
Engines & Generators
27·
FUEL
,...1\.-\---.-
CONTROL
TAPPET
TIMING MARKS
RACK
CRANKSHAFT
PULLEY