SYMPTOMS
'
;
P
b
"$
.cn
4-
0
0
4-
4-
0
c
-
-
.-
3r
ma
a,
POSSIBLE
CAUSES
.-
C.t;
15$
Spark
plug
wet
or
dirty
Spark plug gap incorrect
I
'0
Spark timing incorrect
-I
~~~~ ~~~ ~
Incorrect air gap of ignition coil
Lack of lubrication 'on moving parts
due to long storage
Loose or broken spark plug
0
Worn
piston
or
piston ring
0
Scored
or
worn cylinder walls
0
Carbon
or
lead deposits
in
cylinder
or
on piston
Worn
or
damaged piston
-pin
or
needle
bearing
Worn
or
damaged crankshaft bearing
Low
cranking speed
Engine overloaded
Heavy load at low engine speed
I.
Cooling air restricted by dirt
or
debris
I
Engine operated
in
confined space where
cooling air
is
confinually recirculated
Clogged exhaust
Engine cold
TO.
USE
CHART
. ..
1.
Find problem under problem listing.
.2.
Foilow down column to a black dot.
..
'.
,
,"
1-
-.
:$.
3.
Refer to left
of
dot
for
probable cause.
4.
If first probable cause does not solve problem,
go
to next black dot.
-
29
-
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