Mercury – SmartCraft Weather Cap | Junction Box Protective Cap | 859318T2

Overview

The Mercury SmartCraft Weather Cap (859318T2) keeps your SmartCraft junction box protected from water, salt, and corrosion. It seals any unused connection points on the J-box, keeping the system clean and dry. Simple, small, and built to last — it’s a must-have for any SmartCraft rigging setup.

Key Features

• Weather Protection Cap – Covers open SmartCraft junction box ports to prevent corrosion and water intrusion.
• OEM Fit – Designed specifically for Mercury SmartCraft J-box connectors.
• Durable Marine Material – Built to handle vibration, heat, and salt exposure.
• Easy to Install – Snaps into place in seconds; no tools required.
• Reliable Seal – Keeps dust, spray, and moisture out of unused ports.
• OEM Quality – Genuine Mercury part made to exact factory standards.

Compatibility

• Fits: Mercury SmartCraft Junction Boxes

Performance & Practical Benefits

This cap helps extend the life of your SmartCraft system by sealing off unused junction box connections. It prevents corrosion, keeps the wiring clean, and ensures solid electrical performance in all conditions. A simple part that does an important job.

Why Buy OEM

Mercury rigging parts are built for precision fit and long-term reliability. This cap is made to match the exact connector dimensions of your SmartCraft J-box — no loose fit, no guessing. It’s tough, flexible, and made to hold up for seasons of real-world boating.

FAQ

Q1: What does this cap do?
It seals unused SmartCraft junction box connection points to protect them from water and corrosion.

Q2: Is it required for all installs?
It’s recommended for any open ports on a SmartCraft junction box.

Q3: What’s it made of?
Durable, marine-grade rubberized material designed for tight sealing.

Q4: Will it fit other connectors?
It’s made specifically for Mercury SmartCraft J-boxes and may not fit other systems.

Q5: Is this an OEM Mercury part?
Yes — it’s a genuine Mercury Marine part, made to factory SmartCraft standards.

• Supersessions
  8M0210754, 8M0210754