Auto Choke Inspection - Yamaha YP250 Service Manual

CARBURETOR
D Put a garage jack under the engine to ensure
that the carburetors are positioned vertically.
D Connect the fuel level gauge 1 to the drain
pipe 2 .
Fuel level gauge:
90890-01312
D Loosen the drain screw 3 .
D Hold the gauge vertically next to the float
chamber line.
D Measure the fuel level a with the gauge.
D If the fuel level is incorrect, adjust the fuel lev-
el.
D Remove the carburetor.
D Inspect the valve seat and needle valve.
D If either is worn, replace them both.
D If both are fine, adjust float level by bending
the float tang 4 slightly.
D Install the carburetor.
D Recheck the fuel level.
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AUTO CHOKE INSPECTION

(Ambient temperature lower than 45_C)
1. Remove:
D Carburetor
2. Inspect:
D Autochoke unit
Connect ø 3.3 mm pipe 2 to the starter
1 , and blow it with the mouth etc.
Possible ! Good condition.
Impossible ! Replace auto choke unit.
3. Inspect:
D Auto choke unit (with battery)
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Inspection and adjustment steps:
D Connect auto choke unit leads to the 12 V
battery for 5 minutes.
Black terminal ! 12 V battery (+) 1
Black terminal ! 12 V battery (–) 2
D Connect ø 3.3 mm pipe 4 to the starter 3 ,
and blow it with the mouth etc.
Possible ! Replace auto choke unit.
Impossible ! Good condition.
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6-6
CARB