Enriching Fuel Pump; Electrothermal Valve - Yamaha 50G Service Manual

FUEL
CARBURETOR
Float height a [Stamped mark]:
62F00:
15.0 ± 1.0 mm (0.59 ± 0.04 in)
6H20A, 6H30A, 6H007, 6H107:
14.0 ± 1.0 mm (0.55 ± 0.04 in)
6H210:
14.0 ± 2.0 mm (0.55 ± 0.08 in)
6H015:
19.5 ± 3.0 mm (0.77 ± 0.12 in)
E21060-0

ENRICHING FUEL PUMP

1. Using a screwdriver, disassemble the
fuel pump.
2. Visually inspect the pump body for
cracks and replace if required.
3. Inspect the valves for cracks or distor-
tion and replace if required.
4. Inspect the diaphragm for any sign of
damage, perforation or stretching and
replace if required.

ELECTROTHERMAL VALVE

1. Inspect the needle valve for any bend-
ing and wear, and the piston valve for
flow.
Inspect the body for cracks and the wire
lead for defects.
1 Needle valve
2 Piston valve
3 Body
4 Wire lead
2. Measure the resistance of the electro-
thermal valve.
Electrothermal valve resistance:
Blue – Black
2.3 ~ 3.5 Ω at 20˚C (68˚F)
4-10
E