Sierra 18-99290 Switch Box for Mercury Marine Outboards

The Sierra 18-99290 is a marine-grade CDI switch box designed as a direct replacement for Mercury/Mariner outboard engines. This electronic ignition component controls the timing and distribution of spark to the engine's cylinders, ensuring reliable starting and optimal performance on the water.

Key Features:

• Direct OEM replacement for Mercury part number 332-4796A6
• CDI (Capacitor Discharge Ignition) technology for consistent spark delivery
• Marine-grade construction designed to withstand harsh saltwater and freshwater environments
• Precision-engineered to meet or exceed OEM specifications
• Critical ignition system component for maintaining engine reliability

Sierra Marine is a trusted manufacturer of aftermarket marine engine parts, offering reliable alternatives to OEM components. This switch box is engineered to provide dependable ignition performance for Mercury/Mariner outboard motors, making it an essential replacement part for maintaining your marine engine.