Specifications

PART 1-1-GENERAL ENGINE SERVICE
1-3
ENGINE TROUBLE DIAGNOSIS GUIDE (Continued)
ENGINE CRANKS
NORMALLY, BUT WILL
NOT START (Continued)
ENGINE STARTS, BUT
FAILS TO KEEP RUNNING
ENGINE RUNS, BUT
MISSES
IF THERE IS times. Each time the throttle is
A GOOD SPARK AT actuated, fuel should spurt from
THE SPARK PLUGS ^
e acce
l
era
ting pump discharge
nozzle(s).
Check the spark plugs. If the If fuel is discharged by the ac-
spark plugs are not at fault, check celerating pump, the engine is prob-
the following items: ably flooded, or there is water in
MANUAl CHOKE ^
fUe
!
S
y
St£m
'
OT
.
an
,
e
^
De
"^
chanical item is at fault.
Check the choke linkage for bind- „
fue
,
is not discharged by the
ing or damage. Make certain the
acce
ie
ra
ting pump, disconnect the
choke plate closes when the choke
carburetor fud in
let line at the
knob on the instrument panel is
carburetor
.
Use a suitab
|e container
pulled out and that the plate opens
(o catch the fu£
,
Crank the jne
when the knob is pushed in. ,
o se£
.
f fu£
,
ig reaching the
AUTOMATIC CHOKE carburetor.
Check the position of the choke If fuel is not reaching the car-
plate. If the engine is hot, the plate buretor, check:
should be open. If the plate is not The fuel filter,
open, the engine will load up due to The fuel pump,
the excessively rich mixture and will The carburetor fuel inlet line for
not start. If the engine is cold, the obstructions,
plate should be closed. If the plate is -j^
fuel pump flexible inlet line
not operating properly, check the fol-
for a co
n
a
p
Se
d condition.
lowmg items: The fuel tank line for obstructions.
The choke linkage for binding. „.,
r
, ,
~
u £
. . ,,
5
e
, . ,.
&
The fuel tank vent.
The fast idle cam for binding.
Thermostatic spring housing ad-
If fuel is
reaching the carburetor,
justment.
check:
The fuel inlet system including the
FUEL SUPPLY AT THE CARBURETOR
fuel in
i
et nee
dle and seat assembly
Work the throttle by hand several and the float assembly.
FUEL SYSTEM Carburetor icing.
Idle fuel mixture needle(s) not
Fuel
P
um
P
defective
-
properly adjusted. Check for dirt in the carburetor
Engine idle speed set too low. not allowing fuel to enter or be dis-
The choke not operating properly. charged from the idle system.
Float setting incorrect.
Fuel inlet system not operating IGNITION SYSTEM
properly.
Dirt or water in the fuel lines or Leakage in the high tension
in the fuel filter. wiring.
Determine if the miss is steady or that cylinder was delivering power
erratic and at what speed the miss before being shorted out. If no
occurs by operating the engine at change in the engine operation is
various speeds under load. evident, the miss was caused by
„...« cTtAniiY AT
that cvlinder not
delivering power
middfcd aitAViLT AI before being shorted out. In this case,
ALL SPEEDS
check the:
Isolate the miss by operating the
engine with one cylinder not firing. IGNITION SYSTEM
This is done by operating the engine If the miss is isolated in a par-
with the ignition wire removed from ticular cylinder, perform a spark
one spark plug at a time, until all test on the ignition lead of that cyl-
cylinders have been checked. inder.
Ground the spark plug wire re- If a good spark does not occur,
moved. the trouble is in the secondary cir-
If the engine speed changes when cuit of the system. Check the spark
a particular cylinder is shorted out, plug wire and the distributor cap.
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