Yamaha FT50C - Checking the Prime Start; Assembling the Carburetor

62Y5A11
4-12
1
2
3
4
5
6
7
8
9
NOTE:
• The float should be resting on the needle
valve
4
, but not compressing it.
• Take measurements at the top of the float
flange opposite its pivoted side.
Checking the Prime Start
1. Measure the length of the Prime Start
plunger.
2. Connect the positive Prime Start blue (L)
lead and the negative Prime Start black
(B) lead to a battery as shown.
3. Measure the plunger length
a
after
applying power for 5 minutes. Replace if
out of specification.
Assembling the carburetor
1. Install the main nozzle
1
, plug
2
, pilot
jet
3
, and main jet
4
to the carburetor
body as shown.
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.
NOTE:
• Place the needle valve in the valve seat
when installing the float to the carburetor
body.
• Fit the float pin into the slit on the carbure-
tor body and lock it with the screw.
Float height
a
:
9.5–10.5 mm (0.37–0.41 in)
Prime Start plunger extended length
a
:
More than 24.6 mm (0.97 in)
S62Y4270
4
3
2
1
S62Y4280
7
5
8
6
Carburetor