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9. Check
for engine overheating
-
--
Overheating---
- - - - - -
--
Troubleshooting
Possible
Cause
Excessive Carbon Built-up
in
Com-
bustion
chamber
Not
Overheat
ing
Use
of
poor quality fuel
l
·
Clutch
slipping
Lean fuel mixture
Wrong type of fuel
10.
Accelerate
or run at
high
speed-Engine
Knocks---
- - - - -
-- •
Worn piston
and
cylinder
Engine
Does Not Knock
Poor Performance At Low And Idle Speed
1.
Check ignition timing
--------1► lncorrect--------------1►
Correct
♦
2. Check carburetor air
screw-----
lncorrect
--------------1►
adjustment
Correct
i
3. Check for
leaking
intake
p1pe-----1►
leaking
- - - - - - - - - - -
--
No
Leak
♦
4
.
Perform
spark test
---------1►
Weak
or Intermittent S p a r k - - -
-- -
Good Spark
5
.
Check
H.P. P.
system
-------t► lncorrect--------------1►
Correct
RICIERED
Wrong type of fue
l
Excessive Carbon Built-up
in
Com-
bustion
chamber
Ignition timing too advanced
(Faulty
COi unit)
Lean fuel mixture
Possible Cause
Improper
ignition
timing
(Faulty
CDI
unit)
Faulty alternator
See secuon 4
Loose insulator clamp
•
Damaged insulator and reed valve
gasket
Carbon or wet fouled spark plug
Faulty CDI unit
Faulty ignition coil
Broken or shorted spark plug wire
•
Faulty engine stop switch
Faulty
pulse
generator
Faulty alternator
Faulty exhaust
valve
•
Excessive
carbon
build-up
on
the
exhaust valve
17-3
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