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OPERATION
Problem
Exhaust gas occasionally turns
black
Combustion noise occasionally
makes bresthing sound
Abnornal noise generated
(combustion or mechanical)
Main causes
Clogging air cleaner element
Defective nozzle
Defective compression
Defective nozzle
Low grade fuel being used
Overheating
Damage inside muffler
Excessive valve clearnce
TROUBLES AND ACTIONS
Remedy
Clean or replace, see WHEN
REQUIRED
( Replace nozzles)
( See defective compression
above)
( Replace nozzle)
Change to specified fuel
See engine coolant temperature
gauge indicator is in red range
as above
Replace muffler
( Adjust valve clearance)
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