Attention. Before making any adjustment to the carburetor, check that the spark plug gaps are correct and that all electrical connections and vacuum hoses are securely connected and fully functional. To carry out work on adjusting the carburetor, it is necessary to use an accurate tachometer and an exhaust gas analyzer.
Check the idle speed adjustment, and the quality of the fuel mixture. Leave the tachometer connected. The idle speed must be adjusted before adjusting the fast idle speed.
Warm up the engine to operating temperature and remove the air filter.
Partially open the throttle. then close it until then. until the adjusting screw is seated on the fourth stage of the fast idle speed washer and releases the throttle (see fig. 4A.30).
Start the engine and, without touching the accelerator pedal, check the idle speed and fast idle speed. If adjustment is required, turn the fast idle adjustment screw clockwise to decrease RPM or counterclockwise to increase RPM.
Stop the engine, disconnect the tachometer with fuel mixture quality meter and install the air filter.
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