Yamaha F60A Supplementary Service Manual page 13

Although the main jet specification numbers of the F50 differed between cylinders, the F60 uses
main jets with the same specification number for all four cylinders due to the change in shape of the
intake silencer.
È Air
Comparison chart of main jet diameters
Cylinder #1
F50 #124
F60 #124
Power nozzle
The F60 uses a power nozzle in its carburetors. This nozzle provides a rich air-fuel mixture to
ensure the proper output when operating at high engine speeds.
1 Power nozzle
2 Fuel inlet
È Air-fuel mixture
69W3D1X
F50
#2 #3
#126 #116
#124 #124
Features and benefits
F60
#4
#114
#124
:
S69W1230
:
S69W1240
6