turn over
phrasal verb with turn verb uk/tɜːn/ us/tɝːn/
(发动机)转动,翻转,空转
If an engine turns over, its parts move in order to make the engine start running.
When I put the key in the ignition it turns over, but it won't start. 当我插入钥匙打火时,引擎开始翻转但是没能发动。