Sierra International 18-5437 Marine Ignition Coil for OMC Sterndrive/Cobra Stern Drive Sierra Ignition Coil Meets or exceeds the original equipment quality Sierra part number: 18-5437 Interchangeable with the following: Evinrude/Johnson/OMC 383444, 3852217, Mallory 9-29705 Fit specific, check part numbers to ensure proper fit