I want to share the news.
I found another 7.2V - 250A adaptor, and it was the same weak vibration without any spinning.
Then i opened the cover and remove the silicone tube. Without that tubing, It is working so fast!
I think the tube is so thick and don't let the motor work. Asked the seller but i don't think he will give me a solution.
Maybe i would try another silicon tubes. Bad luck.