ST4B STERN TUBE SYSTEM
Specifically for vessels using a stern-tube or deadwood keel arrangement.
Fully Enclosed
Oil Lubricated
Self-Aligned Propulsion System
Additional Benefits
Designed to handle power suitable for vessels from 30 feet to 200 feet, with no need for high cost of ownership, and often complex, multi-engine and drive packages.
All BOSS propulsion systems are always joy stick compatible.
Builders enjoy simplified and dramatically reduced installation times
End users enjoy a silky smooth, whisper quiet ride, improved operating efficiency and range, plus easy maintenance cycles; with rugged reliable operation.
Popular options include Seatorque's Bio-Mar fully biodegradable Oil; QuicKutters line cutters, extended warranty packages, and more.
All equipment is fully supported by our worldwide network of sales and service professionals, and backed by Seatorque's International 2-year Limited Warranty.
More Information
The BOSS, Bolt On Shaft System feature quick, easy installation, with no alignment issues during construction, or post-delivery. BOSS systems have no horsepower restricitons, and are available from 1″-4″ in standard production, with larger diameters available engineered to order.
The M4B, ST4B, and MX2 systems are an integrated gearbox to propeller solution, incorporating roller trust bearings, in a non-rotating oil filled outer casing, eliminating dip-less seals, stuffing boxes, cutlass bearings, and in many cases the need for intermediate struts. Turbulent water flow to propellers is eliminated increasing propeller efficiency and reducing noise and vibration transmitted to the hull structure. With no shaft seals to leak, engine rooms stay clean and dry.
The MX1 system is also available as a no-compromise alternative for both new construction and refit.
The BOSS system service/maintenance cycle is every 5 years, or 3,000 hours, whichever comes first. Extended Warranty/Protection packages are also available.
*All performance claims herein are approximate representations and are not warranted. Actual results will vary depending on particular vessel parameters and mechanical specifications.
