MASSEY FERGUSON MF 14 - Fuel System

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HIGH
SPESD
MlX?UR8
SCREW
Fig. 13
-
Carburetor Adjustment
Screws
Fig.
12
-
Adjusling
Governor Linkage
Maximum
power
and
efficiency are
possible
only
with
proper
carburetion.
lmproper
carbure-
tor
adjustments
can
cause
overheating, spark
plug
fouling,
excessive valve wear
and lack of
power.
lf
any
of these
problems
occur, check
carburetor
for
adjustments
and
overhaul
if
nec-
essary.
CARBU
RETOR ADJUSTM
ENTS
Refer
to Fig.
13.
1.
Stop
engine and carefully
turn
both fuel
mixture
adjustment
screws in
until they bottom
(do
not
force).
2.
Turn
high
speed
mixture
screw out 2
turns
and
turn idle
mixture screw
out
1-1/4
turns.
This is
an
initial
setting.
3. With
engine
running
at full
throttle,
(do
not
exceed
3600
rpm), adjust
high speed
mix-
ture screw
in
until engine starts
to slow
down.
Then
turn
screw
out
slowly
until engine regains
full
speed.
lf
adjusted
properly,
engine should
acCelerate
smoothly
and
operate
at a steady
governor
speed.
lf
it
doesn't,
open adjustment
screw
slightly.
NOTE: lf
necessary,
adjust
throltle
control
linkage
to obtain
3600
rpm.
4.
Operate
engine at about 1000
rpm and
turn idle
mixture screw in
until engine
slows
down
(runs
rough)
then open screw
until engine
runs smooth.
NOTE: ll
these
adjustments
do
not
correct
the carburetion problem,
the carburetor
should
be
removed
and overhauled.
CARBU RETOR
D
ISASSEM
BLY
1.
Remove carburetor
from
engine and
wash
clean in
solvent.
2.
Remove
retaining
nut,
gasket
and bowl.
3. Remove
float
pin,
float,
needle
and
needle seat.
4.
Remove
idle
mixture screw
and high
speed
mixture screw.
5.
Remove high
speed
mixture screw
seat.
NOTE: ll
choke,
throttle
plates
or shalts
are worn,
replace
the complete
carburetor.
lnspect
all
parts
for wear
or damage,
re-
place
as required.
Clean
all
parts
in
an
alcohol
or acetone
solvent
and
blow
out with
compressed
air.
FUEL SYSTEM
-6-