Cobra CX50P3, Руководство пользователя, Страница: 61 / 78

61
13. Reinstall the pulley, belt and fan cover using a 2.5mm hex key to stop the
rotation of the water pump assembly while tightening with medium strength
thread lock to 10 ft-lb (14Nm).
14. Reinstall the covers
NOTE: Refill the coolant system with 50/50 antifreeze-coolant / distilled water.
CAUTION:
Do not mix Propylene Glycol based coolant / antifreeze solutions with Ethylene
Glycol based coolant / antifreeze solutions.
Fuel & Air System
Carburetor
Tools recommended for carburetor service:

Small flat head screwdriver

WD-40

8mm socket
Your Cobra is equipped with an adjustable carburetor. Some fine-tuning may be
needed according to weather condition and altitude. Proper jetting is
very
important for engine performance and engine life. Serious damage to the engine
can occur if not properly adjusted.
IDLE ADJUSTMENT:
On the left side of the carburetor, there are two adjustment screws. The larger
screw with the knurled head is the idle adjustment screw. To raise the idle, turn
the screw in clockwise (in 1/4 turn increments) and rev the engine after each
adjustment. To lower the idle, turn the screw counter-clockwise.
TOP END JETTING:
Indications that the engine is running too rich (too much fuel for the air) are:

Engine not revving out or blubbering at high RPMs.

Engine will not ‘clean out’

Wet or black spark plug
NOTE: Before changing jetting be sure that the air filter is properly cleaned and
has the usual amount of air filter oil. An overly dirty air filter can cause the engine
to run rich.
If the engine is running rich on the top end it should be leaned out. Leaning it out
can be done by:
1. Changing the main jet to a smaller number.
2. Raising the needle clip (this lowers the jet needle) one notch at a time on the
slide.