Westerbeke 80N4 Operator's Manual page 41

ENGINE ADJUSTMENTS
NOTE:
WESTERBEKE recommends that the following engine adjust-
ments be peiformed by a competent engine mechanic. The information
below is provided to assist the mechanic.
Check the crankshaft position for the start of fuel injection. 5. Notice which injection timing mark is aligned with the
1. Turn the crankshaft pulley counterclockwise viewed from pulley mark. The timing mark in alignment with the
the engine front about 30°. pulley mark indicates the degrees before (IDC), the start
2. Remove No. I high pressure injection line.
1' 1
~DELIVERY
VALVE
e
HOLDER
::-~~~~*-----
DELIVERY
VALVE
3. Remove the injection pump No. I delivery valve holder,
delivery valve and spring and reinstall the delivery valve
holder back into the pump.
DELIVERY VALVE HOLDER TIGHTENING TORQUE:
39 - 44 Nm (4 - 4.5 Kg-m!28.9 - 32.5 ft-Ib)
4. Slowly turn the crankshaft pulley clockwise and at the
same time, feed fuel to the injuection pump by slowly
pumping the feed pump. When the fuel stops to flow out
from No. I delivery valve holder, stop tut;ning the crank-
shaft pulley and pumping. This is
th~
beginning of fuel
injection. .
" PULLEY MARK
of fuel injection
The degrees before TDC differs depending on the engine
model. Refer to the specifications on the injection timing
for the respective model engine. If the timing is incorrect,
do the following adjustment.
ADJUSTMENT PROCEDURES
1. Align the pulley mark and the specified timing mark.
(Refer to the injection timing specifications.)
2. Loosen the four injection pump attachment nuts.
3. To advance the timing, pivot the injection pump at the
pump drive shaft away from the engine.
To retard the timing, pivot the injection pump at the
pump drive shaft toward the engine.
NOTE:
The 1 mm misalignment between the timing marks
on the crankshaft pulley correspond to about
r
in crank
angle.
4. Recheck the timing, following procedures I through 5.
5. Tighten the four injection pump attachment nuts.
6. Again remove No. I delivery valve holder, and reinstall
the delivery valve, spring and the valve holder.
DELIVERY VALVE HOLDER TIGHTENING TORQUE:
39 - 44 Nm (4 - 4.5 Kg-m!28.9 - 32.5 ft-Ib)
7. Reinstall the No. I high pressure injection line.
LOOSEN FOUR NUTS
(80TH SIDES)
TIMING GEAR
CASE
Engines
&
Generators
35