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10-5 ENGINE
KNOCKS
(1) Poor quality gasoline.
(2) Engine operating under heavy load at
low speed.
(3) Carbon or lead deposits in the cylinder head.
(4) Spark timing incorrect.
( 5 )
Loose
connecting rod bearing due
to wear.
(6) Loose piston pin due to wear.
(7) Cuases
of engine overheat.
10-6 ENGINE BACKFIRES THROUGH CARBURETOR
(1) Water or dirt in gasoline,
or low-grade gasoline.
(2) Intake valve stuck.
(3) Valves overheated, or hot carbon particles in the combustion chamber
(4) Engine cold.
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