Replacement outboard motor voltage coil compatible with a wide range of marine engines including F9.9H F13.5A F13.5B F15A F15 F15C F20A F20 F20B F25 F25D and F25G models Designed to stable electrical output for engine performance in marine environments Direct fit component that integrates with existing ignition systems on specified horsepower models from 9.9HP to 25HP Constructed with materials to withstand salt and vibration common in boating applications Easy to install upgrade or replacement part for maintaining system function in outboard motors