Carburetor Installation; Air Screw Adjustment - KYMCO SUPER 9 50 Service Manual

12
. CARBURETOR

CARBURETOR INSTALLATION

＊
When installation, do not allow foreign
particles to enter the carburetor.
Check the carburetor insulator and O-ring
for wear or damage.
Install the carburetor and insulator onto the
intake manifold and tighten the two lock
nuts.
Connect the fuel tube and auto bystarter
wire connector.
＊
Route the auto bystarter wire correctly
and properly.
Install the carburetor cap. ( 12-4)
Install the air cleaner onto the carburetor
and tighten the band screw.
Install the met-in box. ( 2-3 )

AIR SCREW ADJUSTMENT

Remove the met-in box. ( 2-3 )
＊
Warm up the engine before air screw
adjustment.
Turn the air screw clockwise until it seats
lightly and back it to the specification
given.
Air Screw Opening:
±
SH10DA: 1 ¼ ½
Start the engine and turn the air screw in or
out slowly to obtain the highest engine
speed.
＊
Do not force the air screw against its
seat to prevent damage.
Turn the throttle stop screw to obtain the
specified idle speed.
Idle Speed:
SH10DA: 2000±100rpm
Slightly increase the engine speed and
make sure that the engine does not miss or
run erratic.
If the adjustment of the air screw within the
range of ±
½ turn makes no difference to the
engine performance, check other related
items.
turns
Carburetor Cap
Band
Fuel Tube
Throttle Stop Screw
SUPER 9
O-rings
Insulator
Air Screw
12-10
50