- screwdriver
- pliers
Idle speed adjustment is performed with the air filter installed (The filters have been removed for illustration purposes) on a warm engine (coolant temperature 90-95°С), with adjusted clearances in the valve drive and correctly set ignition timing. The air damper must be fully open.
Since the idle speed and carbon monoxide adjustments (SO) in exhaust gases are carried out jointly, and a gas analyzer is needed to determine the CO content, it is recommended to carry out these operations in special workshops. When adjusting the CO content, the crankshaft speed changes slightly, and when adjusting the crankshaft speed, the CO content changes.
1. Start the engine. By turning the mixture amount screw, set the engine speed to 820-900 min-1. After that, check the CO content in the exhaust gases.
2. The CO content should be in the range of 0.5-1.5%. To adjust the CO content, remove the cap that protects the quality screw (composition) mixtures.
3. By turning the quality screw, achieve the required CO content in the exhaust gases. Once again, set the idle speed with the mixture amount screw. If necessary, successively repeat the adjustments and ensure that the idling speed and the CO content are within the limits.