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Sensor Knock for GM 305 5.0, 350 5.7, 377 6.2, 806612T


  • Part #: SIE18-7677

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Knock sensor for GM Small Block marine engines like Mercruiser, OMC, Volvo, PCM, Marine Power and Crusader.

This goes in the water port in the middle of the block just above the oil pan on GM Small Block engines.

This sensor detects pre-ignition or detonation and sends a signal to the ECM to retard the timing to prevent internal engine damage like burning pistons or Valves.


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