Examination
1. Some models are equipped with an idle boost valve that is attached to the side of the carburetor.
2. To check the operation of this valve, first remove the air filter and vacuum hose.
3. After plugging the valve outlet, turn on the ignition (but don't start the engine). Noise should be heard. If not, replace the block.
4. After installing the unit, replace the vacuum hose and air filter.
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