Yamaha FT50C Service Manual page 247

Symptom: Engine can be started, but does not remain on.
• Check the fuel system.
• Check the ignition system.
• Check the compression pressure of power unit.
(Fuel system)
Check that the fuel vent screw of the fuel tank is open.
Is the vent
screw open?
Yes
Check for water or residue in
the fuel filter.
Water or resi-
due?
Yes
Clean the fuel system from the
fuel tank to the fuel filter.
62Y5A11
No
Open the fuel vent screw.
No
Check the fuel hose for kinks or
fuel leakage.
Kinks or fuel
leakage?
Yes
Replace the respective parts.
Check the carbure-
tors.
Power unit
No
Check the fuel
pump operation.
Yes
Good operat-
ing condition?
No
Replace the fuel
pump.
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