When you’re running multiple batteries and a deck full of electronics, clean power distribution isn’t optional — it’s the backbone of reliable performance. The Yamaha Marine Battery Isolator Lead - MAR-6CEIS-1L-ED is designed specifically for Yamaha 4.2L outboards, giving you 14 feet of flexible, marine-grade wiring with built-in 100-amp circuit protection. It’s built to handle the real-world demands of offshore fishing, weekend cruising, or any setup where dual batteries and onboard accessories need to work together without a hitch.

This isn’t just a basic wire harness. The heavy-duty lead is fully sheathed to stand up to vibration, salt spray, and the wear-and-tear that comes with life below deck. Factory-matched connectors make installation clean and straightforward, locking in with the precision Yamaha owners expect. And with the integrated 100-amp breaker, you’re covered if a spike or short tries to take out your system.

Why it belongs in your rig:

• 14-foot length offers plenty of flexibility for larger boats and custom layouts
• Built-in 100-amp circuit breaker protects against overloads and shorts
• OEM fit means hassle-free connection to Yamaha 4.2L outboards
• Marine-grade construction resists corrosion, vibration damage, and chafing

Ideal for:

1. Dual battery systems where you’re splitting power between starting and house loads
2. Boats running multiple electronics, including sonar, radios, and livewell pumps
3. Any Yamaha-powered vessel that needs reliable, protected power distribution

Solid wiring and smart protection make all the difference when you’re offshore and relying on your systems — this Yamaha isolator lead brings both to the table.

• Supersessions
  MAR-6CEIS-0L-ED