Marinco 15A 12/3 Heavy-Duty Extension Cord - 25'

The Marinco 15A 12/3 Heavy-Duty Extension Cord – 25' is purpose-built for anglers, boaters, and watercraft operators who demand reliable shore power connectivity. Whether you're running electronics at the dock, powering a livewell during a tournament, or connecting onboard systems while moored, this marine-grade extension cord bridges the gap between your vessel and stationary power sources with confidence. At 25 feet, it spans typical dock-to-boat distances without requiring daisy-chaining multiple cords—a critical advantage when managing deck clutter and minimizing voltage drop on the water.

Built with 12-gauge, three-conductor wire (12/3 configuration), this cord handles 15-ampere loads safely and efficiently, supplying sufficient current for navigation systems, fish finders, pumps, and cabin equipment without overheating or sagging voltage. The marine-duty construction resists UV exposure, saltwater corrosion, and ozone degradation—critical performance factors in harsh coastal and freshwater environments where standard extension cords fail prematurely. Heavy-duty insulation and robust connectors ensure watertight integrity and consistent electrical contact, even after repeated dock cycles and exposure to spray, rain, and temperature swings typical of boating operations.

Experienced boaters rely on this cord for permanent and seasonal dock setups, auxiliary power runs, and emergency backup connections aboard larger vessels. Its manageable 3.55-pound weight and compact storage profile (6 × 2 × 13 inches) make it easy to stow in a cabin locker or engine compartment without sacrificing deck space. The 25-foot length accommodates most slip configurations at inland lakes, coastal marinas, and riverfront docks. This extension cord is compatible with any standard 15A receptacle and delivers the durability and performance marine professionals expect—backed by Marinco's reputation for marine electrical reliability.