Switch Box For Mercury Outboard 339-6222 A1 A4 A6 A8 A10 18-5788 114-6222

Switch Box for Mercury

This switch box is an electronic ignition component for Mercury outboard engines, serving as a replacement for OEM part numbers 339-6222, 18-5788, 114-6222, and variants A1, A4, A6, A8, A10.

Overview

The switch box is a critical electronic module in Mercury outboard ignition systems, regulating spark timing and engine performance. Designed to replace worn or failed switch boxes, it ensures reliable starting and smooth operation for outboard motors. This switch box is ideal for marine mechanics and boat owners maintaining Mercury outboard engines.

Built For Performance

• Solid-state electronics provide consistent ignition timing
• Weather-resistant housing protects against moisture and vibration
• Direct replacement for OEM 339-6222 and compatible part numbers
• Precise spark control improves fuel efficiency and starts
• Tested to meet factory specifications for durability

On-The-Job Use

• Used in Mercury outboard motors for ignition system repairs
• Commonly installed during tune-ups and engine overhauls
• Suitable for both freshwater and saltwater marine environments
• Helps diagnose and resolve no-spark or misfire issues

Specs At A Glance

Good To Know

Q: What is the function of a switch box in an outboard engine? A: The switch box controls ignition coil firing timing based on engine position, ensuring proper spark delivery for combustion.

Q: How do I verify if this switch box fits my Mercury outboard? A: Check your engine's serial number and compare with the OEM part numbers listed; if your current part matches one of these, it is a direct replacement.

Slight variation in finish or dimensions may occur between production runs, and fit can depend on serial number, so confirm compatibility before ordering.