Assembling The Carburetor - Yamaha F15B Service Manual

FUEL
6. Measure the float height a. Replace the
float and needle valve, if out of specifica-
tion, as a set.
4
NOTE:
9 Measure the float height as shown.
9 The float should be resting on the needle
valve 4, but not compressing it.
9 Take measurements at the top of the float
flange opposite its pivoted side.
9 Turn the carburetor upside-down to make
the measurement.
Float height a:
9.5–10.5 mm (0.37–0.41 in)
Digital caliper:
90890-06704

Assembling the carburetor

Refer to the following points when assem-
bling the carburetor.
cC
9 Do not apply excessive force to push in
the needle valve.
9 Do not apply excessive force to screw in
the pilot screw.
1. Install the main nozzle 1, main jet 2,
pilot jet 3, and plug 4 to the carburetor
body as shown.
2
1
4-9
Fuel system
a
6D440060
4
3
6D440070
2. Install the needle valve 5, float 6, float
pin 7, and screw 8 as shown, and then
the check the float for smooth operation.
8
5
7
NOTE:
9 Place the needle valve in the valve seat
when installing the float to the carburetor
body.
9 Fit the float pin into the slit on the carbure-
tor body and lock it with the screw.
3. Install the pilot screw 9, turn it in until it
is lightly seated, then out the specified
number of turns.
Pilot screw 9 turn-out:
1–2
6
6D440080
9
6D440090
6D45F11