Yamaha F50F Service Manual page 289

Fuel system
Check the fuel filters for clogs,
dirt, or water and the hoses for
leaks.
Good condition?
Yes
Check the fuel pressure.
Out of specification?
No
Check the vapor separator
pressure regulator.
Good condition?
Yes
Check the fuel rail for leaks or
damage.
Good condition?
Yes
Check the fuel pump dia-
phragm.
Continued on next page.
6C13G11
No
Repair or replace the defective
parts.
Check the resistance of each
Yes
injector and check the injectors
for clogs.
Good condition?
Yes
Check the ignition system, lubri-
cation system, or cooling sys-
tem.
No
Replace the pressure regulator.
No
Replace the fuel rail.
Power unit
No Replace the injec-
tors.
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4
5
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7
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9
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