Switch Box Power Pack For Mercury Outboard 339-7452A15, 339-7452A19, 18-5777

Switch Box Power Pack for Mercury Outboard

This switch box power pack is a direct replacement for Mercury outboard engines, cross-referencing OEM part numbers 339-7452A15, 339-7452A19, and 18-577.

Overview

This switch box power pack is an essential ignition component for Mercury outboard motors, controlling spark timing and firing the spark plugs. It replaces worn or failed original equipment power packs, restoring reliable engine performance on the water. Designed for a variety of Mercury outboard models, this unit ensures consistent ignition under demanding conditions.

Built For Performance

• Precision electronic design for accurate ignition timing
• Rugged housing protects against moisture and vibration
• Plug-and-play replacement with OEM-style connectors
• Compatible with multiple Mercury outboard engine families
• Tested to meet original equipment specifications

On-The-Job Use

• Commonly used on Mercury outboard engines for fishing and recreational boating
• Essential for maintaining ignition efficiency in saltwater and freshwater environments
• Often replaced when experiencing misfiring, hard starting, or loss of power
• Ideal for marine mechanics and DIY boat owners performing routine maintenance

Specs At A Glance

Good To Know

Q: Will this power pack fit my 1995 Mercury 150 HP outboard? A: Compatibility varies by engine serial number; check your existing part number against the listed OEM numbers to confirm fitment.

Q: Is installation straightforward? A: Yes, the power pack mounts directly in place of the old unit and uses the same wiring harness connections.

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