Lewmar 90AMP Circuit Breaker – Pros & Cons Guide
Introduction
The Lewmar 90AMP Circuit Breaker for Boats & Marine Engines is a critical component designed to protect your windlass and electrical systems from overload and short circuits. As one of the most trusted names in marine equipment, Lewmar ensures that safety and functionality go hand-in-hand. Whether you’re powering up an anchor windlass or managing onboard current distribution, having the right circuit breaker can mean the difference between a smooth sailing experience and an unexpected system failure.
This 90-amp breaker is engineered specifically for marine-grade durability and performance. Built to handle high loads, it’s an essential addition to your windlass system, offering peace of mind and compliance with safety standards.
Overview / What Is Lewmar 90AMP Circuit Breaker for Boats & Marine Engines
The Lewmar 90AMP Circuit Breaker for Boats & Marine Engines is a high-capacity resettable breaker designed specifically for marine windlasses. It protects the electrical circuit from overloads and faults by automatically shutting off power when excessive current is detected.
Constructed to handle the demanding electrical requirements of marine applications, the Lewmar 90AMP Circuit Breaker can be mounted near the battery or in the helm. It is often used with Lewmar windlass systems and compatible with 12V and 24V configurations.
Top Benefits of Lewmar 90AMP Circuit Breaker
- Manual Reset Function: Offers quick reset without the need to replace fuses after tripping.
- Weatherproof Housing: Designed to withstand harsh marine environments with salt spray, moisture, and vibration resistance.
- Thermal & Magnetic Protection: Dual protection for detecting both instantaneous overload and sustained surges.
- Universal Compatibility: Fits a wide variety of Lewmar and other windlass systems.
Its simple toggle design provides clear visual indication and quick access for resetting, ensuring minimal downtime while out at sea. For a professional installation, it should be placed within 72 inches of the battery source, using appropriate gauge marine wiring.
How to Install Lewmar 90AMP Circuit Breaker
Installing the Lewmar 90AMP Circuit Breaker for Boats & Marine Engines is a relatively straightforward process if you follow best practices and safety guidelines. Here’s how to do it:
- Turn off all power sources: Ensure battery is disconnected before beginning installation.
- Select a location: Mount the breaker in a dry, ventilated area close to the battery or windlass switch panel.
- Use marine-grade wiring: For 90AMP, use at least 4 AWG cable rated for marine use.
- Connect input/output: Wire the battery line to the input terminal and the windlass line to the output terminal.
- Secure with mounting screws: Use corrosion-resistant screws and ensure proper torque to avoid vibration loosening.
It is always advisable to refer to the Lewmar wiring schematic and consult a marine electrician if in doubt. A properly installed circuit breaker enhances safety and ensures your windlass system operates efficiently.
Maintenance Tips
Proper maintenance of the Lewmar 90AMP Circuit Breaker for Boats & Marine Engines ensures long-term performance and safety. Here are top maintenance recommendations:
- Visual Inspection: Check monthly for any signs of corrosion, moisture accumulation, or loose connections.
- Function Test: Manually toggle the breaker at least every three months to confirm proper function.
- Seal Protection: Use dielectric grease on terminal posts to prevent corrosion from salt spray and humidity.
- Check Mounting: Re-tighten all screws and connectors every six months to mitigate vibration effects.
Performing regular maintenance not only extends the product life but also helps you identify electrical issues before they become major problems. A faulty or neglected breaker can cause erratic windlass behavior and increased fire risk.
Lewmar 90AMP Circuit Breaker Troubleshooting
Occasionally, your Lewmar 90AMP Circuit Breaker for Boats & Marine Engines may trip or fail to operate as expected. Troubleshooting early signs can save you time and prevent equipment damage.
Here are the most common issues and solutions:
- Breaker tripping frequently: Check for wiring shorts, excessive load draw, or motor damage in the windlass.
- Breaker not resetting: Wait 60 seconds after tripping to allow thermal reset. If it still doesn’t reset, inspect for internal damage or moisture intrusion.
- No power to windlass: Test continuity using a multimeter between terminals. If open, replace the breaker.
Never bypass a circuit breaker to restore functionality—this puts the entire electrical system at risk. Instead, refer to the installation manual or consult a marine electrician for complex issues.
Best Lewmar Circuit Breaker Options Compared
Lewmar offers several breaker options depending on the power requirements of your boat. Here’s a brief comparison to help you choose the best fit:
| Model | Amperage | Application |
|---|---|---|
| Lewmar 50AMP | 50A | Small windlass systems (under 500W) |
| Lewmar 90AMP | 90A | Standard windlass systems (up to 1000W) |
| Lewmar 135AMP | 135A | Heavy-duty windlass installations (over 1200W) |
The 90AMP model is the most versatile and widely used for mid-sized boats and yachts. It balances protection with current capacity, making it ideal for general use.
Expert Advice and Pro Recommendations
Professionals recommend using the Lewmar 90AMP Circuit Breaker for Boats & Marine Engines in any windlass installation involving loads between 800W to 1000W. It provides adequate protection without nuisance tripping and meets ABYC compliance standards.
When combined with Lewmar windlass switches and solenoids, it offers a complete electrical control solution. Always use appropriately rated marine wiring and ensure the installation location is well ventilated and protected from direct water spray.
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Detailed FAQ Section
What is the main function of the Lewmar 90AMP Circuit Breaker?
The primary function of the Lewmar 90AMP Circuit Breaker for Boats & Marine Engines is to protect your windlass system from electrical overload or faults. When a current spike or short circuit is detected, the breaker automatically shuts off the power, preventing potential fire hazards, equipment failure, and system damage. This resettable breaker combines magnetic and thermal mechanisms to respond to both rapid surges and prolonged overloads. Once tripped, it can be manually reset, unlike traditional fuses that need replacement.
Can the Lewmar 90AMP Circuit Breaker be used on all boats?
Yes, this breaker is suitable for most boats equipped with windlass systems drawing up to 90 amps of current. It is commonly installed on vessels ranging from 25 to 55 feet. That said, it’s crucial to check your windlass specifications and consult a marine electrician before installation. Oversized breakers can fail to protect your system adequately, while undersized ones may cause nuisance tripping. When in doubt, the 90AMP option provides a balanced solution for medium-load systems.
How to troubleshoot issues with Lewmar 90AMP Circuit Breaker?
First, ensure the power supply is active and check for corroded terminals. If the breaker trips immediately after resetting, inspect the windlass motor and wiring for shorts. Use a digital multimeter to test continuity across the terminals. If resistance is infinite (open), the breaker may be damaged and need replacement. Also, check if the breaker is warm—this could indicate continuous overload, suggesting that your breaker rating may be too low for your windlass system.
Is the Lewmar 90AMP Circuit Breaker waterproof?
While the breaker is designed with marine environments in mind and has some resistance to moisture, it is not fully waterproof. It should be mounted in a dry and protected area such as behind a helm panel or in a waterproof breaker box. Using dielectric grease on terminals and ensuring a sealed enclosure can significantly increase resistance to salt corrosion and moisture intrusion. Avoid direct water exposure or submersion at all costs.
Where to buy Lewmar 90AMP Circuit Breaker?
You can purchase the Lewmar 90AMP Circuit Breaker for Boats & Marine Engines online at trusted marine supply stores such as allboatsupplies.com. Make sure the retailer is authorized to sell genuine Lewmar products to avoid counterfeit items. Buying online also lets you compare prices, check compatibility guides, and benefit from seasonal discounts. Don’t forget to use code WELCOME5 at checkout for an extra 5% discount on your order.
Conclusion
When it comes to protecting your marine windlass system, the Lewmar 90AMP Circuit Breaker for Boats & Marine Engines is a trusted solution. It offers efficient overload protection, ease of use, and robust marine-grade construction that stands up to harsh ocean environments. With an easy-to-install design and compatibility across multiple brands, it’s a must-have for any boater prioritizing safety and system reliability.
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