Quicksilver 7778A12 Switch Box Assembly for Mercury Mariner 2-Stroke Outboards

The Quicksilver 7778A12 is an OEM replacement switch box assembly designed specifically for 3-cylinder and 6-cylinder Mercury and Mariner 2-stroke outboard motors equipped with ADI (Alternator Driven Ignition) systems. This critical ignition component ensures reliable spark delivery and optimal engine performance in demanding marine environments.

Key Features:

• Direct OEM replacement for Mercury Marine and Mariner 2-cycle outboards with ADI ignition systems
• Compatible with both 3-cylinder and 6-cylinder 2-stroke outboard configurations
• Complete assembly includes pre-attached lead wires and connectors for both sides
• Manufactured to Mercury Marine original equipment specifications for guaranteed fit and performance
• Straightforward installation using common shop tools
• Backed by Quicksilver's 65+ years of marine industry expertise

This switch box assembly is engineered to meet the rigorous performance standards required for marine applications. Consult your owner's manual or service manual to verify compatibility with your specific outboard model. Some electronic diagnostic tools may be helpful during installation and troubleshooting. Choosing genuine Quicksilver parts ensures you're getting components tested and proven in real-world marine conditions.