Sym JOYMAX 250 User Manual

4. Fuel System
4-3
Trouble Diagnosis
Poor engine start
 No fuel in fuel tank
 Clogged fuel tube
 Too much fuel in cylinder
 No spark from spark plug(malfunction of ignition
system )
 Clogged air cleaner
 Malfunction of carburetor chock
 Malfunction of throttle operation
Stall after started
 Malfunction of carburetor chock
 Incorrect ignition timing
 Malfunction of carburetor
 Dirty engine oil
 Air existing in intake system
 Incorrect idle speed
Rough idle
 Malfunction of ignition system
 Incorrect idle speed
 Malfunction of carburetor
 Dirty fuel
Intermittently misfire as acceleration
 Malfunction of ignition system
Late ignition timing
 Malfunction of ignition system
 Malfunction of carburetor
Power insufficiency and fuel consuming
 Fuel system clogged
 Malfunction of ignition system
Mixture too lean
 Clogged fuel injector
 Vacuum piston stick and closed
 Malfunction of float valve
 Fuel level too low in float chamber
 Clogged fuel tank cap vent
 Clogged fuel filter
 Obstructed fuel pipe
 Clogged air vent hose
 Air existing in intake system
Mixture too rich
 Clogged air injector
 Malfunction of float valve
 Fuel level too high in float chamber
 Malfunction of carburetor chock
 Dirty air cleaner
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Sym JOYMAX 250 Specifications

General

Brand	Sym
Model	JOYMAX 250
Category	Scooter
Language	English