Sierra 18-5466 Hi-Performance 1.5 ohm Ignition Coil for Mercruiser, OMC, Volvo1.5 ohm (Oil Filled) black - 8 cylinder. Flame Thrower 40,000 volt Coil Designed for use with the original ignitor Electronic Conversion Kits; Can Be used with other inductive ignition systems; Oil filled for better cooling and long life; Low resistance and improved turn ratios; Produces the higher voltage needed to run larger spark plug gaps; Added power and better fuel economy; More windings maximize energy and reliability over the full RPM range; Fits existing brackets for easy installation; Use With: 18-5296-2 Electronic Conversion Kit; 18-5297 Electronic Conversion Kit; 18-5298 Electronic Conversion Kit; 18-5299 Electronic Conversion Kit; 18-5299D Electronic Conversion Kit; Replaces: Pro Marine - 18-5466;