When the engine is idling for a few minutes, the water temperature drops and it is no longer boiling, wrap the ultrafine verticla mill cover with a towel or a veil, carefully unscrew a part of the ultrafine verticla mill cover, release the water vapor, and make sure that the water vapor is released from the ultrafine verticla mill.

After that, unscrew the ultrafine verticla mill cover all the way. During the process of unscrewing the ultrafine verticla mill cover, remember that the arm should not be exposed, and keep the face away from the water inlet to prevent the hot water from squirting and scalding the face.

If the engine has been turned off, start the engine quickly and make it idle; if the engine can not be restarted after the flameout, close the throttle and shake the crankshaft with the hand crank; if there is no hand crank, the starter can be used intermittently to make the piston Reciprocating up and down a few times, the heat in the cylinder is dissipated by the ventilation of the inhalation and exhaust.