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Lewmar 589301 Tube F/185TT 185X6X1000

SKU: 1000841 - UPC: 743683011054 - MPN: 589301
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$289.49 $355.96 ( / )

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Engineered for seamless integration with Lewmar's 185TT tunnel thrusters, this precision-crafted fiberglass tube stands as a vital component for reliable boat maneuvering. Measuring exactly 185mm in inner diameter, 6mm wall thickness, and 1000mm in length, it provides the perfect conduit for smooth propeller operation in demanding marine conditions. Unlike standard...
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Lewmar 589301 Tube F/185TT 185X6X1000 Product Description

Engineered for seamless integration with Lewmar's 185TT tunnel thrusters, this precision-crafted fiberglass tube stands as a vital component for reliable boat maneuvering. Measuring exactly 185mm in inner diameter, 6mm wall thickness, and 1000mm in length, it provides the perfect conduit for smooth propeller operation in demanding marine conditions. Unlike standard alternatives, its robust fiberglass construction resists corrosion from saltwater exposure, flexes minimally under hull stress, and maintains structural integrity over years of use.

Standout Features of the Fiberglass Tube

  • Exact Fit Design: Tailored dimensions ensure drop-in compatibility, minimizing installation time and eliminating the need for custom modifications.
  • High-Strength Fiberglass: UV-stabilized resin and multi-layer reinforcement deliver exceptional durability without adding unnecessary weight to your vessel.
  • Smooth Interior Bore: Polished inner surface reduces friction, allowing the thruster propeller to spin freely and quietly for precise control.
  • Marine-Grade Toughness: Withstands constant submersion, impacts from debris, and temperature swings from icy winters to tropical heat.
  • Easy Bonding Surface: Textured exterior optimizes adhesion to hull laminates or epoxy sealants for a watertight seal.

Why Upgrade to This Fiberglass Thruster Tube?

Boat owners swear by fiberglass tubes like this one because they outperform metal options in longevity and low maintenance. Metal tubes often pit and erode in saline environments, leading to leaks or thruster failure mid-voyage. This tube's non-conductive properties prevent galvanic corrosion, protecting your thruster motor and propeller from electrolytic damage. It's lighter than steel equivalents, improving fuel efficiency on planing hulls, and its flexibility absorbs minor hull flexing during rough seas without cracking.

Real-world applications shine in sailboats, fishing vessels, and motor yachts where bow thrusters handle docking in tight marinas or crosswinds. Pair it with proper anodes and regular inspections for thruster systems that last a decade or more.

Perfect Match for 185TT Thruster Systems

Specifically designed for Lewmar 185TT models, this tube slots perfectly into hulls from 12mm to 50mm thick. It's also adaptable for retrofits on older thruster setups, provided the tunnel diameter aligns. Always verify your thruster's service manual for exact tunnel requirements, but users report straightforward swaps on brands like Volvo Penta or Yanmar integrations where 185mm tunnels are standard.

Pro tip: For multi-engine setups or twin thrusters, order multiples to maintain consistency across your propulsion array.

Step-by-Step Installation Insights

  1. Prep the Hull: Dry-fit the tube and mark cutouts with a template. Use a hole saw for clean entry and exit holes.
  2. Seal and Bond: Apply marine-grade polyurethane sealant around the tube ends, then laminate fiberglass cloth over the exterior for a monolithic bond.
  3. Thruster Alignment: Insert the 185TT unit ensuring the propeller shaft is concentric—use a laser level for precision.
  4. Secure and Test: Torque flanges to spec, flood the tunnel, and run low-power tests to check for vibrations or leaks.
  5. Finishing Touches: Fair the exterior with gelcoat for hydrodynamic smoothness.

Common pitfalls? Skipping sealant leads to weeping; over-tightening flanges warps the tube. Patience yields pro-level results.

Long-Term Care for Peak Performance

Flush the tunnel with fresh water after every saltwater outing to rinse salt crystals. Inspect annually for hairline cracks or delamination, especially near anodes. If trailering, support the hull to prevent tube stress. This proactive approach keeps your thruster responsive, avoiding costly overhauls.

Frequently Asked Questions

What are the exact dimensions of the Lewmar 589301 tube?

It measures 185mm inner diameter, 6mm wall thickness, and 1000mm overall length, precision-engineered for 185TT thrusters.

Is this tube compatible with all Lewmar 185TT thrusters?

Yes, it's the direct-fit fiberglass tube for standard 185TT models, ideal for new installs or replacements in compatible hulls.

Why choose fiberglass over aluminum or steel for thruster tubes?

Fiberglass offers superior corrosion resistance, lighter weight, and flexibility against hull stresses, extending service life in marine environments.

Can I install this tube myself or do I need a professional?

Experienced DIY boaters can handle it with basic tools, but professional yard installation ensures perfect alignment and watertight seals.

How do I maintain the fiberglass tube for longevity?

Rinse with fresh water post-use, inspect yearly for damage, and reinforce bonds as needed to prevent issues.

Does this tube reduce noise or vibration from the thruster?

Its smooth bore and vibration-dampening fiberglass minimize propeller noise and hum, improving onboard comfort.

What hull thicknesses does it support?

Suitable for hulls from 12mm to 50mm thick, with easy adaptation via epoxy fill for thicker laminates.

185mm x 6mm x 1000mm fiberglass tube for 185tt thrusters.



The joystick control panel can quickly and intuitively control the thrusters. It has 1 second press and hold security and automatically shuts down when not in use. The complete thruster...

Frequently Asked Questions (FAQ) About Lewmar 589301 Tube F/185TT 185X6X1000

Who is the Lewmar?
How to describe Lewmar 589301 Tube F/185TT 185X6X1000?
What is the highlights of Lewmar 589301 Tube F/185TT 185X6X1000?

Who is the Lewmar?

Since 1946, Lewmar has dedicated itself to making spending time on the water as easy and stress-free as possible; designing and manufacturing innovative and reliable products of the highest quality. With a portfolio of hardware, winches, hydraulics, windlasses, anchors, thrusters, steering systems, hatches and portlights to suit every boat from the smallest day fisher to largest mega-yacht, Lewmar can supply a complete solution whatever your project and requirements.

How to describe Lewmar 589301 Tube F/185TT 185X6X1000?

The joystick control panel can quickly and intuitively control the thrusters. It has 1 second press and hold security and automatically shuts down when not in use. The complete thruster...

What is the highlights of Lewmar 589301 Tube F/185TT 185X6X1000?



Save $66 when you buy the Lewmar 589301 Tube F/185TT 185X6X1000 for only $289 from NVN Marine! Same day shipping before 3pm.

Lewmar 589301 Tube F/185TT 185X6X1000 Technical Specifications

Type: 

Boat Outfitting | Bow Thrusters

Vendor: 

Lewmar

Weight: 

10.0 lb

Lewmar 589301 Tube F/185TT 185X6X1000 User Reviews

Lewmar 589301 Tube F/185TT 185X6X1000 Shipping & Return

Shipping Weight: 

10.0 lb

Box Sizes: 

1.00 (h) x 1.00 (w) x 1.00 (l)

Cubic Feet: 

1.0

Returnable: 

Yes

USPS First Class: 

Yes

P65: 

Yes

Truck Delivery: 

Yes

For detailed shipping policy please check our Shipping Policy and you can find our Return and Refund Policy here.

Lewmar 589301 Tube F/185TT 185X6X1000

$289.49 $355.96 ( / )