senso stihl ms 382 can't slow down 

The carburetor senso stihl ms 382 can't slow down, one of the causes is a leak in the elbow rubber or the manifold rubber. how to check it by turning on the sensor and then flushing or spraying gasoline into the rubber area, if the engine rpm suddenly decreases or maybe the engine dies. It's been confirmed that the rubber is faulty or leaking.