Engine Does Not Start; Engine Idles Roughly, Stalls Or Runs Poorly; Lean Mixture; Rich Mixture - KYMCO SUPER 9 50 Service Manual

12

. CARBURETOR

SERVICE INFORMATION

GENERAL INSTRUCTIONS
• When working with gasoline, keep away from sparks and flames..
• Note the locations of O-rings when disassembling and replace them with new ones during
assembly.
• All cables, fuel lines and wires must be routed and secured at correct locations.
• Bleed air from the oil lines whenever they are disconnected.
SPECIFICATIONS
Venturi dia.
Identification number
Float level
Main jet(Unlimited/limited speed)
Slow jet
Air screw opening
Idle speed
Throttle grip free play
SPECIAL TOOL
Float level gauge

TROUBLESHOOTING

Engine does not start

• No fuel in tank
• Too much fuel getting to cylinder
• Clogged fuel filter
• Clogged air cleaner

Engine idles roughly, stalls or runs poorly

• Incorrect idle speed
• Ignition malfunction
• Compression too low
• Incorrectly adjusted air screw
• Incorrect float level
12-1
SH10DA
2000±100rpm

Lean mixture

• Clogged fuel jets
• Clogged fuel cap vent
• Clogged fuel filter
• Bent, kinked or restricted fuel line
• Clogged air cleaner
• Intake air leaks
• Fuel contaminated
• Faulty reed valve
• Clogged fuel jets
SUPER 9
14mm
C
PB093
8.6mm
#92/#78
#35
±
1 ¼ ½
2～6mm
• Faulty float valve
• Float level too low
• Clogged air cleaner

Rich mixture

• Faulty float valve
• Float level too high
• Clogged air jets
50
SF10DA
C
PB058
1900±100rpm