Carburetor Body; Needle Valve; Pilot Screw; Collar - Yamaha 25J Service Manual

FUEL
CARBURETOR
E32002-0

INSPECTION

Carburetor body

1. Inspect the carburetor body for cracks
or clogging of the passages.

Needle valve

1. Inspect the needle valve for free move-
ment and wear, and replace if required.

Pilot screw

1. Inspect the needle valve for wear, and
replace if required.

Collar

1. Inspect the collar at the end of the accel-
erator-arm for wear, and replace if
required.

Float

1. Visually inspect the float for damage or
cracks, and replace if required.
2. Measure the float height. If it is more
than 1 mm (0.039 in) greater or less
than the specified float height, replace
the valve seat and needle-valve.
Float height:
25hp: 16 ± 0.5 mm
(0.63 ± 0.02 in)
30hp: 15 ± 0.5 mm
(0.59 ± 0.02 in)
4-6
E