Mercury – Moving Prop Alert Light System (Oval) | Non-SmartCraft Safety Kit | 8M0109508

Overview

A spinning propeller can be difficult to see in the water, especially around swimmers or people reboarding the boat. The Mercury 8M0109508 Non-SmartCraft Moving Prop Alert Light System helps make that danger unmistakably clear. This oval-style kit uses two bright LED smart lights connected to a control module that monitors engine status. When the engine is running and the prop is turning, the lights flash to warn anyone in the water. It’s a simple, highly visible safeguard for non-SmartCraft single-engine boats.

Key Features

• Dual Smart Light System – Includes two oval smart lights, each built with six bright LEDs for high visibility.
• Engine-Linked Control Module – Connects to the engine computer and activates the lights only when the prop is turning.
• 20-Foot Harness Included – Long enough for most single-engine rigs; other lengths available separately.
• Enhanced Swimmer Safety – Provides an unmistakable visual warning anytime the prop is moving.
• Expandable Setup – Additional smart lights can be added to increase visibility around the boat.
• Complete Hardware Package – All necessary mounting hardware is included for a clean installation.

Compatibility

• Analog / Non-SmartCraft engines
• Single-engine boats only
• Oval-style Moving Prop Alert light assemblies
• Additional compatible smart lights (sold separately)

Performance & Practical Benefits

This system creates a clear visual alert that is easy to understand at a glance: if the lights are flashing, the propeller is turning. The LEDs are bright enough to be seen in full daylight, which helps protect swimmers, divers, and family members in the water near the transom. The control module does the work automatically—no buttons or switches to remember—so the alert is always active when it needs to be. The 20-foot harness gives you plenty of flexibility for clean routing, and the oval smart lights mount neatly without taking up much space.

Why Buy OEM

Safety systems like this need absolute reliability. Mercury’s OEM Moving Prop Alert components communicate directly with the engine computer, ensuring the lights activate exactly when the propeller is in motion. Off-brand systems often rely on manual switching or loose interpretations of engine data, which can lead to missed alerts. The OEM kit delivers consistent performance, proper sealing, and durable connectors built for real marine conditions.

FAQ

Q1: When is this light system needed?
When you want swimmers and people in the water to have a clear, automatic visual warning that the prop is moving.

Q2: Does this system work with SmartCraft engines?
No. This version is for non-SmartCraft single-engine boats. SmartCraft models use different kits.

Q3: Can I add more lights?
Yes. The system supports additional smart lights to improve visibility around the transom.

Q4: Does the system require manual activation?
No. The control module activates the lights automatically when the prop is in motion.

Q5: Is installation difficult?
Most installs are straightforward—mount the lights, route the harness, and plug the module into the engine’s analog interface.