- a) Make sure that the ignition timing is set accurately (Chapter 4).
- b) Make sure that the spark plugs are in good condition and that the electrode gaps are adjusted correctly (Chapter 4).
- c) Make sure the accelerator pedal cable is adjusted correctly (Section 4).
- d) Make sure the air filter element is clean and in good condition.
- e) Make sure there are no leaks in the air intake system.
- f) Make sure there are no leaks in the exhaust system.
- g) Make sure all electrical equipment is switched off.
- h) Make sure the valve clearances are adjusted correctly (Chapter 1).
12. Warm up the engine to normal operating temperature.
Note: The adjustment must be made within two minutes without stopping the engine. If this fails, or if the radiator electric fan turns on, wait until it turns off and remove excess fuel from the intake manifold by increasing the engine speed to 2000-3000 rpm two or three times, then return the engine to idle.
13. If the vehicle is not equipped with a tachometer, connect an external tachometer according to the manufacturer's instructions. Note the idle speed and compare it with the data in Specifications meaning.
14. The idle speed adjustment screw is located on the left rear side of the carburetor (if you look from above). It is the lower of the two long adjustment screws, and rests directly on the throttle linkage (photo). Turn the screw until the idle speed is correct.
15. The idle mixture is set at the factory and in theory does not require any further adjustment. If due to changes in engine condition (carbon deposits, cylinder wear, etc.) or after rebuilding the carburetor, the mixture has become incorrect, it is possible to adjust it. Note, however, that to check the mixture and adjust it to the required level of accuracy, an exhaust gas analyzer will be required (cO meter). If a suitable tool is not available, contact your dealer.
16. If an exhaust gas analyzer is available, check the CO level according to the manufacturer's instructions. If adjustment is necessary, turn the mixture screw, which is located in a deep recess below the idle speed adjustment screw (photo).
17. After making adjustments, remove the instruments and install the components that were removed to gain access.