Sierra 118-99290 Switch Box for Mercury Mariner 3 Cylinder Outboard Engines

The Sierra 118-99290 is a replacement switch box designed for Mercury and Mariner 3-cylinder outboard engines. This critical ignition component controls the timing and firing of the ignition system, ensuring reliable engine performance and smooth operation.

Key Features:

• Direct replacement for Mercury Mariner 3-cylinder outboard switch boxes
• Engineered to meet or exceed OEM specifications for reliable performance
• Controls ignition timing and spark distribution
• Durable construction designed for marine environments
• Cost-effective alternative to OEM parts

Sierra Marine is a trusted name in aftermarket marine engine parts, offering quality components that provide dependable performance for Mercury and Mariner outboard motors. This switch box is essential for proper ignition system function and engine operation.