Adjusting The Carburetor - Yamaha 2008 SuperJet Owner's Manual

Maintenance and care
(3) Secure the battery in place.
1 Positive (+) battery terminal: Red lead
2 Negative (–) battery terminal: Black lead
3 Breather hose
EWJ00400
WARNING
Be sure to connect the breather hose to
the battery. Fire or explosion could result
if the breather hose is damaged, obstruct-
ed, or not connected properly.
ECJ00260
CAUTION:
After installation, make sure that the bat-
tery leads are properly connected to the
battery terminals.
EJU34460

Adjusting the carburetor

The carburetor is a vital part of the engine and
requires very sophisticated adjustments.
Most adjustments should be left to a Yamaha
dealer who has the professional knowledge
and experience to make them. However, the
operator may adjust the trolling speed as part
of the usual maintenance routine.
ECJ00170
CAUTION:
The carburetor was set at the Yamaha fac-
tory after many tests. If the settings are
disturbed by someone who does not have
the necessary technical knowledge, poor
67
engine performance and damage may re-
sult.
EJU34470
Adjusting the trolling speed
(1) Place the watercraft in the water.
(2) Start the engine and warm it up for 1 to 2
minutes.
(3) While using a diagnostic tachometer, turn
the throttle stop screw to adjust the en-
gine speed to specification. Turn the
throttle stop screw clockwise to increase
the engine speed or counterclockwise to
decrease the engine speed.
1 Throttle stop screw
Trolling speed:
1300 ±50 r/min