ENGINE
ADJUSTMENTS
THROTTLE
AND
STOP
ASSEMBLY
The
throttle
and
engine stop levers arc located on the out-
board side
of
the engine just below the fuel injection pump.
Brackets are provided for owner-installed push-pull cables
that run to the steering station.
The throttle high speed adjustment has been factory set
and
is
wire locked.
The
throttle idle screw is adjustable.
These levers and brackets should be periodically lubricated
and checked for loose fastenings.
STOP
Lt"tH·--..
MODELS
M3-20
SPEED
ADJUSTMENT
SET)
LEVER
STOP
AND
THROmE
LEVERS
HIGH
SPEED
ADJUSTMENT
(FACTORY
SET)
MODELS
M-25
&
M-35
VALVE
CLEARANCE
ADJUSTMENT
NOTE:
Valve adjustment should
nOl
be necessary under nor-
ma/
operating conditions. These adjustments, when required,
should
be
performed
by
an authorized mechanic
Remove the valve rocker cover to expose the engine's valve
train. Remove the glow plugs from each
of
the cylinders to
enable the engine to be easily rotated by hand to position
each cylinder for valve adjustment.
Valves are adjusted with the piston
in
the cylinder being
adjusted at
TOC
(Top Dead Center)
of
its compression stroke.
Each cylinder
is
adjusted following the engine's firing order.
24
Firing Orders
3
Cylinder
Models
1 - 3 - 2
4
Cylinder
Models
1-3-4-2
Adjust the valves beginning with Cylinder #1. Rotate the
crankshaft slowly and observe the operation
of
the valves for
Cylinder #1. Watch for the intake valve to open indicating the
piston
is
on its intake stroke (the piston
is
moving down
in
the
cylinder). Continue
to
rotate the crankshaft slowly and look
for the intake valve
to
close. The piston
is
now starting its
compression stroke (the piston is moving up
in
the cylinder
lowards
IDC).
TIMING
MARK
Watch the timing hole in the bell housing for timing numbers
to
appear. Position the ITC Mark
in
alignment with the notch
in
the timing hole. The piston
in
Cylinder
#]
is
at
TDe.
Adjust the valves
in
Cylinder #1.
Proceed to the nexl cylinder
in
the firing order.
Three
cylinder
models
Rotate the crankshaft 240
0
in
the normal direction
of
rotation
and adjust the #3
Cylinder's valves. Rotate the crankshaft
another
240
0
and adjust the
#2
Cylinder's valves.
Four
cylinder
models
Rotate the
crankshaft]
80
0
in
the normal direction
of
rotation
and adjust the #3
Cylinder's valves. Rotate the crankshaft
another
]80
0
and adjust the
#4
Cylinder's valves. Rotate the
crankshaft another
180
0
and adjust the #2 Cylinder's valves.
To Next Page
Loading...
Need help?
General
