Yamaha F50F - Page 289

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Fuel system
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Check the fuel filters for clogs,
dirt, or water and the hoses for
leaks.
Yes
No
Repair or replace the defective
parts.
Good condition?
Check the fuel pressure.
Check the fuel pump dia-
phragm.
No
Yes
No
Replace the injec-
tors.
Good condition?
Check the ignition system, lubri-
cation system, or cooling sys-
tem.
Check the resistance of each
injector and check the injectors
for clogs.
Yes
Out of specification?
Check the vapor separator
pressure regulator.
Yes
No
Good condition?
Replace the pressure regulator.
Check the fuel rail for leaks or
damage.
Yes
No
Good condition?
Replace the fuel rail.
Power unit