Suzuki FA50 Service Manual page 57

1 .
ENGINE STALLING
I m proper idling rpm.
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2.
Fouled or worn spark plug
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3.
Lean fuel/air mixture
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Air screw out of adjustment
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Clogged carburetor jet
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Clogged fuel hose
C logged gaso l i ne tank cap
I ncorrect carburetor fuel level
4. Compression leakage from cran kcase (oil seal, mating surface)
NOT ENOUGH ENGINE POWER
1 . Defective spark plug gap
2. Clogged a i r cleaner
3. Clogged exhaust muffler
4. Clogged carburetor jet
5. I n correct carburetor fuel level
6.
Slipping clutch (see clutch s l i ppage)
8. Worn cy l i n der, piston or piston rings
7. Sticking piston ring
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POOR E N G I N E P E R FO R M AN C E AT LOW-S P E E D
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1 . Carburetor adjustment
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Air screw adjustment
I n correct fuel level
I d l i ng rpm out of adjustment
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2 . Ignition system
I ncorrect spark plug gap
I mproperly timed ignition ( i m proper stator mounting position)
3.
Air cleaner element ripped or leaking
4. Air intake through inlet hose
5. Damaged reed valve
POOR E N G I N E PE RFORMANCE AT HIGH-S P E E D
1 . I ncorrect spark plug gap
2. Clogged carburetor jet
3.
C logged a i r cleaner element
Muffler restricted
4.
5 . I mproperly timed ignition ( i mpropr stator mounting position)
6.
Defective ignition coil
SER J'ICJNC /,\'f."OR AL l 'J"JON 4-3
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