Adjusting The Throttle Link Rod; Adjusting The Pilot Screw - Yamaha F15B Service Manual

Adjusting the throttle link rod

1. Turn the pully 1 to the fully open position
as shown, and then push the carburetor
throttle lever 2 to the fully open position.
2
3
2. Set the both fully position and tighten the
screw 3.

Adjusting the pilot screw

1. Start the engine and warm it up for 5 min-
utes to check the stability of the engine.
Adjust the pilot screw if necessary.
Digital tachometer:
90890-06760
6D45F11
2. Turn the pilot screw 1 in direction a or
b until the engine idle speed has been
specified.
1
6D440100
3. Turn the throttle stop screw 2 in direc-
tion c or d until the specified engine idle
speed is obtained.
NOTE:
6D440110
9 To increase the idle speed, turn the throttle
stop screw in direction c.
9 To decrease the idle speed, turn the throttle
stop screw in direction d.
4. After adjusting the idle speed, rev the
engine a few times and let it idle for at
least 15 seconds to check the stability of
the engine.
1
b a
Pilot screw 1 turn-out:
1–2
c
d
2
Engine idle speed:
900–1,000 r/min
Carburetor
1
2
3
6D440120
4
5
6
6D430160
7
8
9
4-10