Carburetor Trouble Shoot

Engine will not start

 Four stroke engine troubleshoot



The carburetor mixes fuel with air


50cc Scooter Carburetor diagram for CVT engine


Motorcycle carburetor diagram
Scooter carburetor diagram Motorcycle carburetor diagram


Common problems

Leaking Carburetor Gasket

Engine will run poorly if air leaks between the carburetor, intake, isolator or intake manifold.


Clogged Jets

Clogged main jet

Engine starts but will not run more than a few seconds

Clogged pilot jet

Engine will not idle properly


Fuel overflows or engine floods

Float is stuck or disconnected
Adjust float level

Needle and seat valve stuck
Free stuck valve

Vacuum fuel valve problem (CVT engines)

Be sure valve is properly installed
Clean or replace valve

Clean Carburetor

Disassemble carburetor in an orderly manner (make drawings if necessary , you will need to reassemble it).
Clean all parts and orifices
Replace damaged parts
Reassemble

Rebuild carburetor
Carburetor kits may include gaskets, o-rings, jets , diaphragm and float.
Try to use all parts that apply.


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