Introduction
This manual provides instructions for the proper installation, operation, and maintenance of your Attwood 3540-7 LED Bi-Color Navigation Sidelights. These lights are designed to provide essential navigation lighting for marine vessels up to 65.6 feet (20 meters) in length. Please read these instructions thoroughly before installation and use.
Safety Information
Always observe basic safety precautions when working with electrical systems on a boat. Failure to do so may result in property damage, serious injury, or death.
- Disconnect power to the circuit before installing or servicing the navigation light.
- Ensure all wiring connections are secure and properly insulated to prevent short circuits and corrosion.
- Verify that the light is suitable for your vessel's size and type according to local and international regulations (e.g., USCG, ABYC).
- Do not modify the product. Use only genuine Attwood replacement parts if necessary.
Package Contents
Verify that all components are present before beginning installation:
- Attwood 3540-7 LED Bi-Color Navigation Sidelight unit
- Mounting hardware (screws)
- Instruction sheet (this document)
Image: Attwood 3540-7 LED Bi-Color Navigation Sidelights in its retail packaging, showing the product and its UPC.
Setup and Installation
The Attwood 3540-7 is designed for deck mounting on the bow of your vessel.
Mounting Location
- The light must be mounted on the centerline of the vessel's bow.
- Ensure an unobstructed view of the red (port) and green (starboard) lights from the required angles (112.5 degrees each, totaling 225 degrees forward).
- The light is rated for vessels up to 65.6 feet (20 meters) in length.
Image: Front view of the Attwood 3540-7 LED Bi-Color Navigation Sidelight, showing the clear lenses for red and green lights.
Installation Steps
- Prepare Mounting Surface: Choose a flat, stable surface on the bow. Clean the area thoroughly.
- Mark Drill Holes: Position the light and mark the locations for the mounting screws. Ensure the light is oriented correctly with the red lens to port (left) and green lens to starboard (right).
- Drill Pilot Holes: Drill pilot holes appropriate for the provided mounting screws. Also, drill a hole for the wiring to pass through the deck.
- Wiring: Connect the light's wires to your boat's 12-volt DC electrical system. Typically, the black wire is negative (-) and the colored wire (often red) is positive (+). Ensure connections are watertight and insulated. The light draws 2.4 watts at 12 volts DC.
- Secure Light: Fasten the light to the deck using the provided stainless steel screws. Do not overtighten. Apply a marine-grade sealant around the base of the light and screw heads to prevent water intrusion.
- Test Functionality: Restore power and verify that both the red and green lights illuminate correctly. Check the integrated telltale indicators on top of the housing.
Image: Angled view of the Attwood 3540-7 LED Bi-Color Navigation Sidelight, highlighting its compact design and stainless steel housing.
Operating Instructions
The Attwood 3540-7 LED Bi-Color Navigation Sidelights operate as part of your boat's 12V DC electrical system, typically controlled by a switch at the helm.
- Activation: Turn on the designated navigation light switch on your boat's control panel.
- Telltale Indicators: The light unit features integrated telltale indicators on top of the housing. These small lights confirm that the main navigation lights are illuminated and functioning.
- Visibility: The light provides 225 degrees of visibility, with 112.5 degrees for the red (port) light and 112.5 degrees for the green (starboard) light.
Image: The Attwood 3540-7 LED Bi-Color Navigation Sidelight with both red and green lights illuminated, demonstrating its operational state.
Maintenance
The Attwood 3540-7 LED Bi-Color Navigation Sidelights are designed for durability and minimal maintenance.
- Cleaning: Periodically clean the lenses with fresh water and a soft cloth to remove salt, dirt, or marine growth. Avoid abrasive cleaners that could scratch the lens material.
- Inspection: Regularly inspect the light for any signs of damage, loose mounting, or corrosion on the wiring connections.
- LED Lifespan: The LED elements are rated for over 50,000 hours of use and remain cool to the touch, reducing the need for frequent bulb replacement.
- Corrosion Resistance: The unit features a corrosion-resistant, watertight housing, but proper installation and sealing are crucial for long-term performance in marine environments.
Image: Top view of the Attwood 3540-7 LED Bi-Color Navigation Sidelight, showing the integrated telltale indicators and mounting screw.
Troubleshooting
If you encounter issues with your navigation light, refer to the following common problems and solutions:
| Problem | Possible Cause | Solution |
|---|---|---|
| Light does not illuminate | No power, faulty wiring, blown fuse, or switch issue. | Check boat's fuse panel, wiring connections, and switch functionality. Ensure 12V DC power is reaching the light. |
| One side (red or green) does not illuminate | Internal LED failure on one side. | Contact Attwood customer support for warranty service if within the warranty period. |
| Light appears dim or flickers | Low voltage, poor connection, or corrosion. | Verify battery voltage. Inspect and clean all electrical connections. |
Specifications
| Feature | Detail |
|---|---|
| Model Number | 3540-7 |
| Visibility | 2 Nautical Miles |
| Vessel Length | Up to 65.6 feet (20 meters) |
| Power Draw | 2.4 Watts at 12 Volts DC |
| Light Type | LED Bi-Color (Red & Green) |
| Mounting Type | Deck Mount |
| Housing Material | Corrosion-resistant, watertight housing with stainless steel accents |
| LED Lifespan | Rated for over 50,000 hours |
| Dimensions (L x W x H) | Approximately 2 x 3 x 4 inches |
| UPC | 022697035400 |
Warranty and Support
Attwood Corporation provides a 10-year warranty for the 3540-7 LED Bi-Color Navigation Sidelights against defects in materials and workmanship. For warranty claims, technical support, or replacement parts, please contact Attwood customer service directly. Keep your proof of purchase for warranty validation.
For further assistance, visit the official Attwood website or contact their customer support department.
