👉 A stopping fluid, also known as a choke or cutoff valve fluid, is a specialized liquid used in internal combustion engines to control the air-fuel mixture during engine shutdown or maintenance. It acts as a valve that restricts airflow into the combustion chamber, effectively choking off the intake of fuel when the engine is turned off or needs to be stopped for repair. This prevents accidental starting and ensures safety by eliminating the risk of ignition from residual fuel. Stopping fluids are typically color-coded and labeled with specific codes indicating their use in particular engine systems, allowing technicians to quickly identify the correct fluid for a given application.
