Adjusting the fuel level in the float chamber
Check float adjustment (fuel level in the float chamber) and template drawing
1 - adjusting tongue
1. Remove the carburetor cover.
2. Flip cover with gasket.
3. Install the template and check the position of the floats (needle valve ball must be pressed in).
4. If the adjustment is incorrect, then the position of the floats should be corrected using the support tongue (1).
Checking and adjusting the additional opening of the throttle valve of the float chamber
This operation can be performed both on the removed and on the carburetor installed in the car.
Carburetor removed
Test conditions: ambient temperature 20°C.
Checking the position of the moving roller when adjusting the additional opening of the throttle valve of the first chamber
1 - adjusting screw, 2 - movable roller, 3 - screwdriver for adjusting the movable roller, 4 - measuring rod with a diameter of 3 mm, 5 - template 180 143 T
1. With a measuring rod (or drills) with a diameter of 3 mm, check the opening of the throttle valve of the first chamber.
2. If necessary, set the required value with a screw (1).
Carburetor installed
1. Check the position of the moving roller. For this you should:
- insert template (5) 180 143 T, as in fig. Checking the position of the moving roller when adjusting the additional opening of the throttle valve of the first chamber;
- check if the moving roller is (2) between two template cutouts (5);
- if necessary with a screwdriver (3) adjust with adjusting screw and rod (4) 3 mm in diameter.
2. Extract template.
3. Start the engine.
4. Place the circular cutout of the template on the moving roller and rotate the template (5) in such a way as to dock it with the upper wall of the housing of the starting device (1 - adjusting screw).
5. The engine speed should be in the range of 2350-2450 rpm if the carburetor is equipped with a plate on the starter cam, or 1700-1800 rpm if the carburetor does not have such a plate.
6. If necessary, adjust with the adjusting screw.
Checking and adjusting the opening of the air damper
Adjusting the opening of the air damper on the removed carburetor
1 - rod, 2 - adjusting screw, 3 - locknut
This operation can be performed both on the removed and on the carburetor installed in the car.
Carburetor removed
Test conditions: ambient temperature 20°C.
1. Grasp the rod with tweezers (1) (see pic. Adjusting the opening of the air damper on the removed carburetor) and push it in the direction of the arrow until it contacts the screw (2).
2. Using a drill with a diameter of 6 mm, measure the opening of the air damper.
3. If necessary, unscrew the lock nut and use the screw (2) set the required value.
Carburetor installed
Adjusting the opening of the air damper on the installed carburetor
2 - adjusting screw, 3 - locknut, 4 - template 180 143 T, 5 - measuring rod with a diameter of 6 mm
1. Remove the pipe connecting the air filter to the carburetor.
2. Start the engine.
3. Place template 180 143 T on the moving roller. Rotate Pattern (5) (see pic. Adjusting the opening of the air damper on the installed carburetor) in such a way as to dock it with the upper wall of the housing of the starting device.
4. Using a drill with a diameter of 6 mm, measure the opening of the air damper.
5. Unscrew locknut if necessary (3) and with a screw (2) set the required value.
Checking and adjusting the throttle opening
Adjusting the opening of the air damper when the throttle valve of the first chamber is fully opened
1 - template 180 143 T, 2 - measuring rod with a diameter of 8 mm, 3 - adjusting forks
This operation can be performed both on the removed and on the carburetor installed in the car.
Carburetor removed
Test conditions: ambient temperature 20°C.
1. Fully open the throttle valve of the first chamber.
2. Using a drill with a diameter of 8 mm, measure the opening of the air damper.
3. If necessary, set the required value using forks (3) (see pic. Adjusting the opening of the air damper when the throttle valve of the first chamber is fully opened) (spreading the forks increases the controlled value and vice versa).
Carburetor installed
1. Post Template (1) on the movable roller and turn it so that it docks with the upper wall of the trigger housing.
2. Using a drill with a diameter of 8 mm, measure the opening of the air damper.
3. If necessary, set the required value using forks (3) (spreading the forks increases the controlled value and vice versa).
Idle adjustment
Idle adjustment - throttle screw
1 - throttle screw
Idle speed adjustment - mixture adjustment screw
2 - screw for adjusting the composition of the mixture
The starting device must not function, the engine must be warmed up to operating temperature, the ignition system must be in good condition and correctly adjusted. Leaks through which additional air can be sucked in are unacceptable. Also, the exhaust gas system must be sealed, and all consumers of electrical energy must be turned off.
1. Adjust engine idle speed with throttle screw (1) (see fig. Idle adjustment - throttle screw).
2. Adjust the CO content in the exhaust gases using the mixture ratio screw (2) (see pic. Idle speed adjustment - mixture adjustment screw).
3. If necessary, adjust the engine idle speed.