Lewmar Tunnel, 7-9/32" (185mm) x 4'11"
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You have 30 days to request a return. All sale items are final sale.
Lewmar tunnel in the 185TT size—built for installing or replacing the GRP tunnel that houses your Lewmar TT tunnel thruster assembly.
Key Features
- Tunnel only (no thruster unit included)
- Matches Lewmar 185TT thruster configuration (185mm tunnel diameter)
- Specified size: 7-9/32" (185mm) diameter x 4'11" (approx. 1500mm) length
Intended Use
- Lewmar 185TT tunnel thrusters (tunnel-only replacement/upgrade)
Product Details
- Lewmar Tunnel Only
- Size: 7-9/32" (185mm)
- Length: 4'11"
- SKU/Part Number: 239-589302
- Product category: Bow & Stern Thrusters
Parts Desk Insights
Best Use Case: Use this tunnel when your Lewmar TT installation needs a replacement tunnel section (for example, during tunnel refurbishment or when restoring the correct tunnel diameter/length for an 185TT setup).
Common Issues: Tunnel replacements usually require careful alignment with the thruster mounting points and correct mating surfaces. If your installation is delayed or won’t seat properly, double-check the tunnel-to-hull interface and ensure the related installation hardware and seals/gaskets (not included here) are correct for your thruster and hull cutout.
Related Products & Accessories
- Browse Thrusters - Pair with the correct Lewmar 185TT thruster unit and any required installation components for a complete tunnel thruster setup.
Shipping information
In-stock and OEM parts: ship same or next business day.
Locally warehoused items: ship within 1-3 business days.
Special-order items: timeline confirmed after order.
Returns & warranty
Returns & Satisfaction Guarantee
We stand firmly behind the quality of every product we sell. Your confidence matters to us — and we back it with a straightforward 30-Day Satisfaction Guarantee.
If you are not fully satisfied, you may request a return within 30 days of delivery. All returns must receive pre-approval prior to being sent back. Unauthorized returns will not be accepted.
To qualify for a return:
Item must be in new, unused condition
Product must be in its original packaging
All parts, components, hardware, manuals, and accessories must be included
Packaging must be undamaged and suitable for resale
Important:
Electronics are strictly inspected. No returns on open-box electronics. Exceptions may apply only with prior written approval. Any electronic unit that has been installed, powered, activated, or altered may not be eligible for return.
We are serious about product integrity — and equally serious about taking care of our customers. If there is ever a product issue, contact us immediately so we can make it right.
For return authorization, please contact our support team before shipping anything back.