CDI 114-7452A3 339-7452A3 Switch Box For Mercury 2 Cylinder 18 20 25 35 40 Hp

This CDI 114-7452A3 339-7452A3 Switch Box is an ignition switch box compatible with for Mercury outboards and references part number(s) 114-7452A3, 339-7452A3, 18-5776, and 9-25101.

Product Overview

The CDI 114-7452A3 339-7452A3 Switch Box for Mercury 2 Cylinder outboards is a critical engine component designed to restore proper ignition system operation. By controlling the exact firing sequence and providing reliable high-energy CDI switching, this module ensures smooth engine acceleration and stable performance under challenging marine conditions. Built with marine-grade sealed electronics and insulated internal circuitry, it effectively handles high thermal demands while resisting vibration and humidity.

Key Features & Performance

• Marine-grade sealed electronic construction protects internal circuitry
• Designed to maintain precise and stable spark sequencing
• Vibration-resistant circuitry engineered for harsh outboard environments
• High-energy CDI ignition switching design enhances throttle response

Fitment & Compatibility

• for Mercury 18 HP 2 Cylinder
• for Mercury 20 HP 2 Cylinder
• for Mercury 25 HP 2 Cylinder
• for Mercury 35 HP 2 Cylinder
• for Mercury 40 HP 2 Cylinder

Common Uses

• Replacing a failing switch box causing intermittent spark or engine misfires
• Resolving random cylinder firing issues and top-end RPM loss
• Restoring stable electrical operation to outboard ignition systems

Technical Specifications

• Product Type: Switch Box
• Part Number(s): 114-7452A3, 339-7452A3
• Replacement Number(s): 18-5776, 9-25101, 332-7452A2, 332-7452A3, 899883230
• Brand Compatibility: for Mercury
• Engine Compatibility: 18HP, 20HP, 25HP, 35HP, 40HP 2-Cylinder
• Equipment Type: Outboard Engine

Frequently Asked Questions

Q: How do I ensure this switch box will fit my outboard engine? A: You should verify your existing module's part number against the listed OEM and replacement references such as 339-7452A3 or 114-7452A3 before ordering.

Q: What are the common symptoms that indicate this part needs replacement? A: Typical signs include an intermittent spark, unexpected engine drop-out, random cylinder misfires during acceleration, or a noticeable loss of top-end RPM.