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3....Gasoline...Engine...Gannot...Running...Unsmoothly
TROUBLE
Knocking...
sound
Abnormal...com-
bustion
Spark...lacking
4....Stop...Suddenly...When...Running
TROUBLE
CAUSE
Fuel... sup-
p l y ... s y s -
tem
S t o p ... s u d -
denly...when...
running.
Ignition
...system
The...other
CAUSE
Piston,...cylinder...or...piston...ring...
is...worn...excessively.
Piston...pin...and...piston...pin...hole...
are...worn...excessively.
Tie... rod... small... head... is... worn...
excessively.
Roller...bearing...for...crankshaft...
main...shaft...is...worn.
Engine...is...too...hot
Too... much... carbon... deposit... in...
combustion...chamber
Improper... gasoline... brand... or... low...
gasoline...quality
There...is...water...in...float...cham-
ber
improper... spark... plug... elec-
trodes...clearance
Something... wrong... with... in-
duced...coil,...and...so...on
Fuel...is...finished
Carburetor...is...clogged
Float...chamber...is...leaking
Needle...valve...is...sticked.
Spark... plug... is... punctured,...
or... short-circuited... by... car-
bon...deposit
Side... electrode... of... spark...
plug...is...dropped...out
H i g h - t e n s i o n ... w i r e ... i s...
dropped...out
Ignition...coil...is...punctured...
or...short-circuited
Parking...wire...is...located...on...
engine...body
Cylinder...is...seriously...scored...
and...valve...dropped...out
TROUBLESHOOTING
REMEDY
Replace...the...worn
Replace... piston... or... piston...
pin
Replace...tie...rod
Replace...roller...bearing
Shoot...trouble
Clear...away
Replace...with...qualified...gaso-
line
Clean
Adjust
Check... and... replace... dam-
aged...parts
REMEDY
Refill...fuel
Check...fuel...line...and...dredge
Repair
Dismantle...float...chamber...and...
eliminate...it
Replace...spark...plug
Replace...spark...plug...
Weld...on
Replace...ignition...coil
Find... out... meeting... and... insu-
late
Repair... or... replace... damaged...
parts
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