Fuel filter
Wash the filter in gasoline and blow it with compressed air. Check the condition of the filter. If the filter or fuel supply pipe is damaged, replace it with new ones.
Float mechanism
Rinse the parts in gasoline, check the condition. The floats must not be damaged. On the sealing surface of the needle valve and its seat, no damage is allowed that violates the tightness of the valve. The valve should move freely in its seat, and the ball should not hang. The weight of the floats must not exceed 6.23 g. Replace defective parts with new ones.
Carburettor cover
Remove dirt and oil from the cover and all openings and channels. Wash the cap in acetone or gasoline and blow with compressed air. Inspect the sealing surfaces of the cover. If there is damage, replace the cover with a new one.
Starting device
Clean all parts of the starting device, wash with gasoline and blow with compressed air. Inspect parts, replace damaged parts with new ones.
Jets and emulsion tubes
Clean jets and emulsion tubes from dirt and resinous compounds, wash them with acetone or gasoline and blow with compressed air.
Do not clean the jets with a metal tool or wire, or wipe the jets and other parts of the carburetor with cotton, cloth or rags, as the villi can clog the fuel-emulsion path. In case of severe clogging, you can clean the jets with a soft wood needle moistened with acetone.
Carburetor body
Clean the body of dirt and oil. Rinse its channels with acetone or gasoline and blow with compressed air. If necessary, clean the channels and emulsion tubes with special reamers. Inspect the sealing surfaces of the housing; if they are damaged or deformed, replace the housing with a new one.
Accelerator pump
Clean the pump parts, wash them in gasoline and blow with compressed air. Check the ease of movement of the ball in the sprayer and the movement of the moving parts of the pump (lever, diaphragm parts). Eating is not allowed. The diaphragm must be intact, without damage. Check the condition of the sealing surfaces and gaskets. Replace damaged parts with new ones.
Power mode economizer
The diaphragm must be intact and without damage. If the total length of the diaphragm pusher, including the head, is less than 6.0 mm, replace the diaphragm assembly with the pusher.