Sierra 18-99222 Switch Box for Mercury 2-Cylinder Outboard Engines

The Sierra 18-99222 is a high-performance switch box designed for 2-cylinder Mercury and Mariner outboard engines. This switch box is used in ignition systems on Mercury 6, 8, 9.9, 10, 15, 20, and 25 HP 2-stroke outboard motors built from 1997-2006 with 4 magnet flywheels.

Key Features:

• Precision-engineered replacement ignition switch box for Mercury/Mariner 2-cylinder outboards
• Compatible with 6 HP through 25 HP 2-stroke engines (1997-2006 model years)
• Designed for engines equipped with 4 magnet flywheel systems
• Premium aftermarket quality meeting OEM specifications

Replaces OEM Part Numbers:

• Mercury #855713A3, #855713A4
• CDI 114-5713

Sierra Marine is a trusted leader in aftermarket marine engine parts, delivering reliable replacement components that meet or exceed original equipment standards. This switch box provides critical ignition system functionality for maintaining optimal engine performance.