Service Manual
8-4 TROUBLESHOOTING
Problem in the governor
system
[Engine malfunctions at high speed]
pn--YES -
relatrvely large period produced
i
[Engine malfunctions at low speed]
Remove spark plug and check
spark by cranking engine while
having the plug touched against
engine block.
n
!
WARNING:
Keep the plug as far away as
possible from the plug hole.
To avoid an electric shock, do not
hold the plug itself. Make sure
to hold the plug cap.
F
l-
WEAK -
LSTRONG-
.
1
L
l
Plugged air hole in tank cap. - Clean
@Entry of dust and air into fuel - Clean
filter or fuel pipe.
0 Fouled electrodes.
l
Faulty igniter.
@Faulty ignition coil.
0 Faulty high tension cord.
l
Faulty pulser coil.
- Replace
- Clean
- Replace
- Replace
- Replace
- Replace
Is unusual smoke emitted out of
muffler?
YES
LNo7
*Overrich fuel in pilot system.
.-.I-
Turn in pilot screw by
a minor extent
- Disassemble and
clean
revolution drop or does engine
stall at a certain position7
1 ,
Is air sucked through carburetor
YES
LNo7
* 0 Loose flange nuts.
- Retighten
or intake manifold flanges.
0 Damaged gasket.
- Replace
I
Are valve clearances of normal -
~0 - OCompression leakage.
- Adjust valve clearance
values7
LYES~
l
Wrong valve timing.
1
Is alignment of timing gear marks .
correct?
NO
Correct alignment of
timing gear marks
-