Quick D185 Fiberglass Tunnel

The Quick D185 Fiberglass Tunnel is a precision-engineered installation component designed for marine bow thruster systems. Built from high-quality fiberglass composite, this tunnel provides a durable conduit for thruster shaft routing while maintaining structural integrity in saltwater and freshwater environments. Whether you're outfitting a center console, sportfisher, or cruising vessel, this tunnel simplifies professional-grade thruster installation and ensures long-term reliability in demanding marine conditions.

Engineered with exacting specifications, the Quick D185 features a 185mm internal diameter and measures 1 meter in length, accommodating standard bow thruster shaft assemblies without binding or play. The 5.5mm fiberglass wall thickness strikes the critical balance between structural rigidity and weight efficiency—essential for vessels where hull load distribution impacts fuel economy and handling. Fiberglass construction resists corrosion, osmotic blistering, and salt spray degradation far better than metal alternatives, eliminating the maintenance burden that corroded steel or aluminum tunnels demand over multiple seasons of use.

This tunnel is the preferred choice for boatbuilders, marine service centers, and experienced vessel owners performing major thruster retrofits or new construction. The standardized 185mm diameter aligns with popular Quick bow thruster models, ensuring seamless compatibility during both new builds and replacement installations. Professional installation requires proper hull cutout preparation and fiberglass bedding techniques to prevent water intrusion and maintain warranty coverage. Stock this specification for inventory or order for your next marine project—reliable, field-proven performance in a single, dependable component.