Service manual
VALVE
ADJUSTMENT
/INJECTION
TIMING
19°
CRANKSHAFT
PUllEY
TIMING
MARKS
TIMING
POINTER
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
perfonning 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 xalve 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
timirig
check.
Rotate the.engine's crankshaft in
its
normal direction of
rotation
to
position piston
No.
1 at the beginning of
itS
compression stroke.
Move
the
throttle lever
to
its
full
open position
and
operate
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(19" 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 (
19"
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
(0.01mm)
changes the injection timing
by
approximately
one
degree.
To
advance
the
timing, decrease the shim thickness,
as
required.
To
retard the timing, increase
the
shim
thickness,
as.
required.
Refer
to
your Parts List
for
shim
part
numbers.
13
FUEL
INJECTION
PUMP
PlUNGER