Lewmar Electric Tunnel Thrusters

Lewmar Electric Tunnel Thrusters – Simple, Reliable Control

Lewmar electric tunnel thrusters are designed to deliver dependable performance for everyday docking and maneuvering. Unlike more complex systems, Lewmar focuses on simplicity, durability, and ease of use — making their thrusters an excellent choice for a wide range of boats.

The Lewmar TT series is the core of their thruster range, offering straightforward electric tunnel solutions for both recreational and professional vessels.

TT Series – The Core of Lewmar Thrusters

Lewmar TT (Tunnel Thruster) systems are installed inside a transverse tunnel in the bow or stern. These thrusters generate lateral thrust, allowing the vessel to move sideways without relying solely on engine power.

Key features of the TT series include:

• Equal thrust in both port and starboard directions
• High-efficiency 5-blade propellers
• Compact and practical design
• Reliable DC electric motors
• Durable construction for marine environments

These systems are designed for consistent performance rather than complexity, which is why they are widely trusted by boat owners worldwide.

Available Sizes and Applications

Lewmar tunnel thrusters are available in a range of tunnel diameters and power outputs, allowing proper matching to different vessel sizes.

Typical sizing overview:

• 110 / 125 mm – small boats and compact vessels
• 140 mm – boats up to ~10–11 meters
• 185 mm – mid-size yachts (most popular segment)
• 250 mm – larger motor yachts
• 300 mm – heavy vessels and demanding conditions

Choosing the correct size is critical for performance.

???? Learn more here:
Bow Thruster Selection & Supply for Yachts in Europe (anchor)

Gen 2 and Proportional Systems

Lewmar offers updated Gen 2 thrusters, which include improvements in efficiency, sealing, and reliability. These are not separate models, but upgraded versions within the TT range.

For more advanced control, Lewmar also provides proportional thrusters, allowing smooth variable thrust instead of simple ON/OFF operation. This is especially useful for precise docking in tight marinas.

Why Choose Lewmar Tunnel Thrusters

Lewmar thrusters are built for practical use. They are not overly complex, but they deliver exactly what most boat owners need: reliable control when it matters.

Key benefits:

• Simple and proven technology
• Easy installation and integration
• Competitive pricing compared to premium systems
• Low maintenance requirements
• Wide availability of spare parts

Compared to brands like Max Power, Lewmar systems are often chosen for their straightforward design and value-for-money approach.

Installation Considerations

Proper installation plays a major role in thruster performance.

Important factors include:

• Correct tunnel positioning
• Adequate cable sizing for high current loads
• Proper fuse protection
• Battery capacity and isolation
• Integration with control panels

We recommend installation by a qualified marine electrician to ensure safety and efficiency.

Supporting Components

A complete thruster system includes:

• Batteries
• Heavy-duty cabling
• Fuse protection
• Battery isolators
• Control systems

For system protection, see:

• How to Choose an ANL Fuse for a Bow Thruster
• How to Choose the Right NH Fuse for a Bow Thruster

Expert Support from Gaelix Marine Service

At Gaelix Marine Service, we help you choose the right thruster based on real vessel parameters — not just catalog data.

We provide:

• Professional sizing recommendations
• Worldwide delivery
• Technical consultation
• Full system supply

Learn More and Compare Options

If you are comparing different systems, read:

• How to Size a Thruster Properly: DC, AC, Hydraulic and Retractable Solutions (blog anchor)