GRP (Fibreglass) Thruster Tunnels

Official Max Power GRP Tunnels for Thruster Installations

A tunnel thruster system depends not only on the motor and propeller — the tunnel itself plays a major role in performance, installation quality, and long-term reliability. That’s why Max Power GRP (fibreglass) tunnels are a trusted choice for boat owners, professional installers and shipyards worldwide.

These tunnels are engineered to provide:

• stable structural bonding into the hull

• a smooth internal profile for efficient water movement

• corrosion resistance and long service life

• compatibility with a wide range of tunnel thrusters

At Gaelix Marine Service, we supply genuine Max Power GRP tunnels and support customers with the correct sizing and selection depending on hull design and installation layout.

Why Choose GRP (Fibreglass) for Thruster Tunnels?

Fibreglass (GRP) is one of the most reliable materials for tunnel installations due to its excellent durability and resistance to marine conditions. Unlike metal solutions, GRP does not suffer from corrosion issues, and it integrates smoothly into the hull using standard marine bonding methods.

Main Benefits of Max Power GRP Tunnels

• Marine-grade composite construction

• Smooth internal surface to support clean water flow

• Ideal for bow thrusters and stern thrusters

• Strong wall thickness for stable hull integration

• Multiple lengths for different hull structures

Selecting the Correct Tunnel Diameter & Length

When choosing a tunnel, the key points are:

• diameter (must match the thruster system requirements)

• length (depends on hull thickness, reinforcement zones and placement)

• available space for the thruster motor and installation access

• correct alignment to ensure clean flow and minimise turbulence

A correctly selected tunnel helps ensure predictable thrust response and easier manoeuvring during docking.

Available Max Power GRP Tunnel Sizes (Full Range)

Below is the complete range of Max Power GRP (fibreglass) tunnels currently listed in this category.

Ø110mm Max Power GRP Thruster Tunnels (Wall 4mm)

Ø125mm Max Power GRP Thruster Tunnels (Wall 5mm)

Ø185mm Max Power GRP Thruster Tunnels (Wall 6mm)

Ø250mm Max Power GRP Thruster Tunnels (Wall 7mm)

Ø300mm Max Power GRP Thruster Tunnels (Wall 9mm)

Ø315mm Max Power GRP Thruster Tunnels (Wall 9mm)

Why Buy Max Power GRP Tunnels from Gaelix Marine Service?

As official sellers of Max Power, we supply genuine products, correct sizing options, and professional support to help you complete your installation with confidence. Whether you’re installing a new bow thruster, upgrading your docking system, or working on a custom boatyard project, we can help you choose the right tunnel diameter and length for your hull.

FAQ – Max Power GRP (Fibreglass) Thruster Tunnels

What is a GRP thruster tunnel and why is it important?

A GRP (fibreglass) thruster tunnel is a structural component installed through the hull to house a bow or stern thruster. Its quality and correct sizing are critical, as the tunnel directly affects thrust efficiency, water flow, noise levels, and long-term reliability of the thruster system.

How do I choose the correct tunnel diameter?

The tunnel diameter must match the thruster model requirements specified by the manufacturer. Using a tunnel that is too small or too large can reduce performance or make installation impossible. Always select the diameter recommended for your specific Max Power thruster.

How do I choose the correct tunnel length?

Tunnel length depends on:

• hull thickness and hull shape

• reinforced sections inside the bow or stern

• the exact thruster position

• available internal space

In many cases, a longer tunnel can be trimmed during installation, which gives installers more flexibility and helps achieve perfect alignment.

Can a GRP tunnel be cut or drilled during installation?

Yes. Max Power GRP tunnels are designed to allow cutting and drilling during installation. Their composite construction and internal finish support safe trimming when carried out correctly by professional installers.

Are GRP tunnels suitable for both bow and stern thrusters?

Absolutely. GRP tunnels can be used for both bow and stern thruster installations, provided the correct diameter, length and positioning are selected according to the hull design.

Why choose Max Power GRP tunnels instead of generic alternatives?

Max Power GRP tunnels are engineered specifically for marine thruster applications. They offer consistent wall thickness, reliable structural strength, and compatibility with Max Power thruster systems — reducing installation risks and ensuring long-term performance.

Does Gaelix Marine Service supply genuine Max Power tunnels?

Yes. Gaelix Marine Service is an official seller of Max Power products, supplying genuine GRP thruster tunnels with full technical support for correct selection and installation.

Knowledge Center – Thruster Tunnel Installation Guide

Selecting the correct thruster tunnel plays a key role in thruster efficiency, noise reduction and long-term reliability. Tunnel diameter, length, wall thickness and correct positioning inside the hull all directly affect how your bow or stern thruster performs during docking manoeuvres.

To help you make the right choice, Gaelix Marine Service has prepared a detailed technical guide in our Knowledge Center, covering:

• how GRP thruster tunnels work

• how to select the correct tunnel diameter and length

• common installation mistakes and how to avoid them

• practical tips for clean and professional thruster installation

Visit our Knowledge Center to learn more about Max Power thruster tunnels and docking system solutions.