Adjust the gap between the breaker contacts.
Note: Engine oil temperature should be between 30-70°.
Connect the stroboscope according to its operating instructions.
Disconnect the vacuum hose (if equipped) from the vacuum advance regulator.
Connect the tachometer according to its operating instructions.
Set the engine speed to 800-900 rpm. When adjusting the ignition timing, the carburetor throttle valve should always be closed. To increase the speed, do not open the throttle valve under any circumstances.
Please note: A V-belt pulley may have up to three mounting grooves. Which of them is necessary for carrying out the adjustment is shown in the table "Ignition timing data". The same table also indicates whether it is necessary to disconnect the tube from the vacuum regulator of the ignition distributor during adjustment. To avoid making mistakes while performing the work, you should mark the required groove on the pulley with chalk.
Use a strobe light to illuminate the timing groove on the belt pulley. When the ignition is adjusted correctly, it should coincide with the joint of the engine block halves.
Caution! If the ignition timing groove is not in place when illuminated by a strobe light, the following problems may occur:
- dry slider on the breaker lever (lubricate);
- the breaker plate has deviations from the permissible dimensions (compare with a new part).
If the ignition timing is set incorrectly, loosen the distributor clamp bolt and slowly turn the distributor, illuminating the groove with a stroboscope while the engine is running.
When the timing groove on the timing belt pulley aligns with the joint between the engine block halves, tighten the distributor clamp bolt. Check the ignition timing again with the engine running and adjust if necessary.
Connect the tube to the vacuum regulator of the ignition timing.
If there is no stroboscope, then adjustment can be made using a test lamp. However, after this, you should check the adjustment with a stroboscope at the first opportunity.
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