Mercury – Quicksilver Switch Box Assembly | Ignition System Component | 6–25HP 2-Stroke Outboards | 7452A19

Overview

When your ignition system starts acting up, the Mercury Marine 7452A19 Quicksilver Outboard Switch Box Assembly brings it back to life. Designed for Mercury and Mariner 6–25HP 2-stroke outboards using ADI (Alternator Driven Ignition), this OEM assembly restores strong, consistent spark across all cylinders. Each switch box includes the proper lead wires and connectors for both sides, ensuring clean installation and reliable electrical contact. Built to handle marine heat, vibration, and moisture, it delivers the durability and spark performance Mercury engines are known for.

Key Features

• Purpose: Controls timing and spark delivery within the ADI ignition system.
• Design: Complete switch box assembly with factory-matched leads and connectors.
• Material: Built from marine-rated components designed for heat and moisture resistance.
• Performance: Restores smooth idle, crisp acceleration, and steady top-end power.
• Durability: Handles vibration, humidity, and long hours of operation on the water.
• Ease of Service: Installs with standard tools; some diagnostic testing tools may be helpful.

Engine & Boat Compatibility

• Mercury 6–25HP 2-stroke outboards with ADI (Alternator Driven Ignition)
• Mariner 6–25HP 2-stroke outboards with ADI ignition systems

Performance & Real-World Benefits

The 7452A19 switch box restores precise ignition control to smaller Mercury and Mariner engines. Faulty switch boxes can cause weak spark, misfiring, or hard starts. Replacing it brings back quick starts, smooth idle, and dependable running across the RPM range.

Each OEM switch box is tested for proper voltage output and resistance to heat and moisture. Once installed, you’ll notice stronger spark delivery and cleaner throttle response — key for getting the most from your 2-stroke every time you hit the water.

Why Choose Mercury OEM

The Quicksilver 7452A19 is a genuine Mercury Marine ignition component, built to exact specifications for ADI-equipped outboards. Aftermarket ignition parts often use lower-quality circuitry or mismatched connectors that can fail under marine conditions.

Mercury’s OEM electrical components are engineered and tested to withstand vibration, temperature swings, and moisture exposure, ensuring consistent spark and long-term reliability. Using genuine parts means your ignition system performs like new — with no guesswork.

FAQ

Q1: What engines does this switch box fit?
It fits Mercury and Mariner 6–25HP 2-stroke outboards with ADI (Alternator Driven Ignition).

Q2: What’s included?
A complete switch box assembly with leads and connectors for both sides.

Q3: Do I need special tools for installation?
You can install it with common tools, though electronic diagnostic tools may help verify output.

Q4: What problems can a bad switch box cause?
Symptoms include misfiring, weak spark, rough idle, or failure to start.

Q5: Why OEM instead of aftermarket?
Mercury OEM switch boxes provide the correct voltage, wiring, and durability tested for your specific engine — something aftermarket parts often lack.