Whistle Alert (Flexible)


Identifies compression stroke in hard-to-reach areas

SKU: 7894 Categories: ,


No More Burning Fingers and Hands! Just Listen for the Whistle to Find the TDC Compression Stroke.

The Whistle Alert (Flexible) performs the same job as the rigid version but can be placed in hard-to-reach places where the rigid version would be difficult or impossible to place. It screws into a spark plug hole to quickly indicate compression stroke.


  • Eliminates the need for an extra hand
  • Can be used in hard-to-reach places
  • After installation, your hands are free to complete the job
  • Excellent for use on deep, recessed spark plug threads
  • Rigid model also available (#7882)

Additional information

Weight0.16 lbs


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