Caution. If the engine starts up spontaneously after the ignition is switched off, although the carburetor and ignition are adjusted correctly, an electromagnetic shut-off valve can be installed instead of the threaded plug "Q". Electrical connections: disconnect the plug of the positive connector of the ignition coil (terminal 15) and connect it to the connecting wire of the electromagnetic shut-off valve. Connect the second plug of the connecting wire to the ignition coil. Turn the ignition key to position II and check whether the valve operates (clicks). Check the CO content and idle speed.
A - bimetallic spring housing
B - sealing ring
C - lid of the automatic device for enriching the combustible mixture at start-up
D - membrane box of the vacuum limiter
E - vacuum regulator of the throttle valve of the second chamber
F - screw for adjusting the speed of rotation of the crankshaft at idle
G - accelerator pump
H - economizer valve
K - carburetor body
L - fuel supply nipple
M - main jet of stage I
N - main jet stage II
O - carburetor cover
R - idle jet
Q - brass threaded plug