Engineered Marine Products 300-03107 Switch Box for Mercury Mariner 4-Cyl Outboards

The Engineered Marine Products 300-03107 is a high-quality replacement switch box designed for Mercury Mariner 4-cylinder outboard engines ranging from 50 to 125 horsepower. This critical ignition system component controls the timing and delivery of electrical current to the spark plugs, ensuring reliable starting and optimal engine performance.

Key Features:

• Direct replacement for Mercury OEM part number 332-5772A7
• Compatible with Mercury Mariner 4-cylinder outboards, 50-125 HP
• Precision-engineered to OEM specifications for reliable performance
• Sierra cross-reference number 18-5881
• Quality construction for marine environment durability

This switch box is an essential ignition system component that works in conjunction with the stator and power pack to provide properly timed spark to your outboard engine. When your original switch box fails, this EMP replacement offers a cost-effective solution without compromising on quality or reliability.