Yamaha NEOS 50 YN50 (2002) [98/161] Carburetor

CARB

CARBURETOR

5-6

EAS00503

CHECKING THE AUTOCHOKE UNIT

NOTE:

When checking the autochoke unit, the

ambient temperature must be lower than 45°C

(113°F).

1. Remove:

• carburetor

2. Check:

• autochoke unit



a. Connect a 3.3 mm hose  to the starter air

passage  and blow into the hose.

NOTE:

When the starter plunger is open, air should

come out of the other side of the starter air

passage.



3. Check:

• autochoke unit



a. Connect the autochoke unit leads to a

12.0 V battery for five minutes.

b. Connect a 3.3 mm hose  to the starter air

passage  and blow into the hose.



Starter plunger Perform step (3)

opens

Starter plunger Replace the auto-

closes choke unit.

Positive batter lead 



yellow/red

Negtive battery lead 



black

Starter plunger Replace the auto-

opens choke unit.

Starter plunger Autochoke is OK.

closes