Yamaha F50A Service Manual page 18

GEN
INFO
2. Medium speed operation
When the throttle valve opens further, air-fuel mixture is fed from the pilot outlet and all the bypass
holes. In addition, air-fuel mixture is also supplied from the main nozzle in accordance with the
opening angle of the throttle valve.
0
1 Pilot screw
2 Pilot outlet
3 Bypass holes
4 Venturi
5 Pilot jet
6 Main jet
7 Main nozzle
8 Pilot air jet
1-13
General information
3
2
1
9
8
7
2
6
9 Main air jet
0 Throttle valve
È Air
É Air-fuel mixture
Ê Fuel
:
:
:
3
4
5
S62Y1270
62Y3A11