Yamaha F50A Owner's Manual page 87

To clean the fuel tank
1) Empty the fuel tank into an approved
gasoline (petrol) container.
2) Pour a small amount of suitable sol-
vent in the tank. Reinstall the cap and
shake the tank. Drain the solvent
completely.
To clean the fuel filter
1) Remove the screws holding the fuel
hose joint assembly . Pull the assem-
bly out of the tank.
2) Clean the filter (located on the end of
the suction pipe) in a suitable clean-
ing solvent. Allow the filter to dry.
3) Replace the gasket with a new one.
Reinstall the fuel hose joint assembly
and tighten the screws firmly.
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