|  | 1. To remove a cap from the persistent screw (1). | 
 
 | 2. To connect the vacuum gage in parallel to the vacuum regulator of the distributor of ignition. | 
 
 | 3. To start and warm up the engine. | 
 
 | 4. To wrap the screw so that depression increased. | 
 
 | 5. To turn out the screw before receiving the minimum depression then to turn out it for a half of turn. | 
 
 | 6. To adjust idling of the heated-up engine. | 
 
 | 7. To establish a cap on the screw. |