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- 27 -
ENGINE TROUBLESHOOTING
FAULT
PROBABLE CAUSE
REPAIR
Engine
won't start
Low engine
output
Engine
runs
erratically
Insufficient
compression
Loose spark plug
Tighten plug
Loose cylinder head bolt
Tighten bolt
Damaged gasket
Replace gasket
Sufficient
compression
FUEL SYSTEM PROBLEMS
No fuel
supplied to
combustion
chamber
Insufficient pulling speed
for starting rope
Pull rope sharply
Foreign matter in fuel tank
Clean tank
Clogged fuel line
Clean fuel line with
dealers advice
No fuel in tank
Supply fuel
Fuel tap not open
Open tap
FUEL SYSTEM PROBLEMS
Combustion
chamber
supplied with
fuel
Poor
spark
Spark plug dirty
with carbon or wet
with fuel
Remove carbon or
dry spark plug
Damaged spark
plug
Replace spark plug
Faulty magneto
Consult dealer
Good
spark
Improper
adjustment of
carburetor
Insufficient pulling
speed for starting
rope
Pull rope sharply
Wrong grade of fuel used
Check grade of fuel
Overloaded
Check the working
conditions
Overheating
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