9-6
E
ROUGH IDLING
TRBL
SHTG
O50000-0*
ROUGH IDLING
Is the fuel fresh?
Are all wiring connections tight?
Replace the fuel.
Tighten.
YES
YES
NO
NO
Are the spark-plugs tightly screwed in? Tighten. (P.3-14)
YES
NO
Does sparking take place in all cylinders?
YES
NO
Is the lighting coil used to supply a heavy load? Disconnect the load.
NO
YES
Are the ignition sequence and timing correct? Correct this. (P.3-9 – 3-12)
YES
NO
Are the settings of the carburettor correct? Correct the setting. (P.3-8)
YES
NO
Is the magneto base loose? Tighten.
NO
YES
Does the reed-valve seal effectively? Replace the reed-valve.
YES
NO
Does the flywheel have excessive run-out? Check the crankshaft (P.5-20)
NO
YES
Does the fuel-pump operate normally? Replace.
YES
NO
Does the compression meet the specified pres-
sure?
Inspect the cylinder piston head gasket
and piston rings for wear and damage.
(P.5-15, 5-19)
YES
NO
RE-CHECK
GO TO (P.9-4)
3
6A9-7-5F-B1-9 7/25/03 11:15 AM Page 9
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