Checking The Fuel Tank; Checking The Fuel Joint; Checking The Fuel Strainer (Tank Side); Checking The Fuel Strainer - Yamaha F4B Service Manual

2. Disconnect the fuel hoses c and d.
3. Remove the primer pump e.
e
4. Remove the holder f, fuel strainer g,
fuel hose c, and primer pump e.
c
e
5. Remove the fuel hoses d, h, and i.
d
i

Checking the fuel tank

1. Check the fuel tank. Replace if cracked
or damaged.
c
d
g
f
h

Checking the fuel joint

1. Check the fuel joint. Replace if cracked or
damaged.
2. Connect the special service tool a to the
fuel joint outlet a.
3. Apply the specified positive pressure.
Replace the fuel joint if the specified
pressure cannot be maintained for at
least 10 seconds.
a
0
Vacuum/pressure pump gauge set a:
90890-06756
Specified positive pressure:
50.0 kPa (0.50 kgf/cm

Checking the fuel strainer (tank side)

1. Check the fuel strainer. Clean it using
straight gasoline if there is foreign mate-
rial.

Checking the fuel strainer

1. Check the fuel strainer. Replace if
cracked or damaged.
2. Connect the special service tool a to the
fuel inlet a.
3. Block the fuel outlet b using a rubber
plug b, and then apply the specified
positive pressure. Replace the fuel
strainer if the specified pressure cannot
be maintained for at least 15 seconds.
Fuel tank
a
50
2
, 7.3 psi)
6-6
0
1
2
3
4
5
6
7
8
9
10
A