It is also necessary to flush the spool device of the carburetor, the cavities and nozzles of the air filter through which the exhausted gases pass.
Since 1987, the hose 8 for removing crankcase gases to the throttle space of the carburetor has been extended to the oil separator 2.
Pic. 2-75. Diagram of the crankcase ventilation system: A and B - operation of the carburetor spool device at a low crankshaft speed (A) and at high (IN): 1 - oil separator drain pipe; 2 - water separator; 3 - breather cover; 4 - gas suction hose, 5 - flame arrester; 6 - exhaust manifold; 7 - air filter element; 8 - a hose for venting gases into the throttle space of the carburetor; 9 - axis of the throttle valve of the primary chamber; 10 - spool, 11 - spool groove; 12 - calibrated hole