KYMCO People Service Manual page 165

13. FUEL SYSTEM/CARBURETOR/
FUEL PUMP/ FUEL TANK
TROUBLESHOOTING
Engine does not start
x No fuel in tank
x Restricted fuel line
x Too much fuel getting to cylinder
x Clogged air cleaner
x Contaminated fuel
x Faulty fuel pump
Throttle does not open fully, so engine stalls
x Damaged vacuum piston diaphragm
x Clogged diaphragm hole
Lean mixture
x Clogged fuel jets
x Clogged fuel tank cap breather hole
x Clogged fuel filter
x Bent, kinked or restricted fuel line
x Faulty float valve
x Float level too low
x Faulty fuel pump or insufficient output
Engine is hard to start
x No fuel in tank
x Restricted fuel line
x Clogged fuel strainer
x Faulty fuel pump
x Broken or clogged vacuum tube
x Faulty or clogged charcoal canister
Lean mixture
x Clogged charcoal canister
x Bent, kinked or restricted fuel line
x Clogged fuel strainer
x Float level too low
PEOPLE/PEOPLE S 250
Engine idles roughly, stalls or runs poorly
x Incorrect idle speed
x Rich mixture
x Lean mixture
x Clogged air cleaner
x Intake air leak
x Contaminated fuel
x Faulty air-cut off valve
x Damaged vacuum tube and connectors
x Damaged carburetor insulator
Rich mixture
x Auto bystarter valve opens excessively
x Faulty float valve
x Float level too high
x Clogged air jets
x Auto bystarter valve set plate installed in
the wrong groove
xClogged air cleaner
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