Whistle Alert (Rigid)


Identifies compression stroke

SKU: 7882 Categories: ,


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

The Whistle Alert (Rigid) screws into a spark plug hole to quickly indicate compression stroke.


  • Eliminates the need for an extra hand
  • After installation, your hands are free to complete the job
  • Excellent for use on deep, recessed spark plug threads
  • Flexible model also available (#7894)

Additional information

Weight0.5 lbs


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