Yamaha Motor 20C Manuel D'entretien page 262

TRBL
SHTG
O60001-0*
(A) The engine stalls in any gear.
Is the fuel-hose connected correctly?
Is the engine warmed-up?
Does the choke function normally?
Is the choke placed in the set position?
Are idling speed and ignition-timing correct?
Is the carburettor clogged, or is there water in it?
Are the fuel-pump and fuel-line in good condi-
tion?
Is blue spark produced when the engine stalls?
Has the engine ever overheated?
ENGINE STALLS
ENGINE STALLS
YES
YES
YES
YES
YES
NO
YES
YES
NO
Correct. (P.3-3)
NO
Warm it up.
NO
Repair.
NO
Place in set position.
NO
Correct this. (P.3-8 – 3-12)
YES
Clean the carburettor. (P.4-8)
NO
4
GO TO
NO
Check the ignition coil and CDI unit.
(P.8-6, 8-7)
YES
Check the piston and cylinder for signs of
seizure.
9-7
(P.9-5)
E