The fuel level in the float chamber is adjusted with the carburetor cover removed.
You can, without disconnecting the trigger rod, unscrew the screws securing the cover, lift it and, after removing the gasket, turn the cover to the side as far as the gaps in the places where the rod is attached will allow.
Pump gasoline into the float chamber using the manual pump lever until the level stabilizes.
The distance from the fuel level to the upper plane of the carburetor body should be 21.5 mm.
If the fuel level is below the specified level, it is necessary to bend up tongue 1 of the float, which rests against the shank of the shut-off valve needle.
If the level is higher, bend the tongue down.
After each bending of the tongue, you need to unscrew the drain plug of the float chamber, drain the gasoline from it and, screwing the plug back into place, re-pump gasoline using the manual pump lever
You can adjust the starting system directly on the car by completely warming up the engine and connecting a tachometer to it.
Starting the engine with the air filter removed and lightly pressing the accelerator pedal, completely close the air damper with its drive handle.
Then use the blade of a screwdriver to open the air damper as far as the lever mechanism will allow.
The engine crankshaft rotation speed should be 2500-2700 min.
If it differs from the specified one, you need to loosen the lock nut on the adjusting screw that rests on the profile lever and screw this screw in or out.
After completing the adjustment, tighten the locknut tightly.
Adjust the idle system on a warm engine with a tachometer connected to it.
To do this, with the engine running, set quality screw 2 to the position that ensures maximum idle speed.
Then, using the quantity screw 1, set the frequency increased by 100-120 min.
After this, tighten the quality screw until the rotation speed decreases by 100-120 minutes.
This method of adjustment allows you to meet exhaust toxicity standards.
More precise adjustment is recommended using a gas analyzer.