Description of the Semi-Suspension for Boat Seat VLF
The VLF semi-suspension, developed by Scandinavian Seat Suspension Systems – 4S, is a robust, ultra-low-profile shock-absorbing unit designed for boats with limited installation space. It can be mounted directly onto the deck, console, or between the seat and a standard-size pedestal. With its simple weight adjustment system using EPDM shims, the VLF provides superior shock absorption without the need for tools.
Already widely used on motorboats worldwide, the 4S suspension solutions are now available in Europe, offering an affordable and effective way to improve comfort, safety, and durability at sea.
This semi-suspension unit is also equipped with a clever tilting system that allows the seat to be folded forward. When the boat is at dock or anchor, this prevents the seat from filling with water. It also offers practical access to a hatch or equipment located under the suspension, making it both functional and space-efficient.
Specifications
- Height: 60 mm (2.5″)
- Adjustable preload: 50–130 kg (110–285 lbs)
- Weight: 4 kg (9 lbs)
- Deck mount: 330 × 230 mm (13 × 9″)
- Seat mount: 330 × 315 mm (13 × 12.5″) – handles 250 mm (10″) from center line
- Materials: Premium marine-grade stainless steel, aluminium, EPDM
- Standards: Meets ABYC H-31 requirements for type AO (any boat, any position, any speed)
Installation / Maintenance
Installation
Quick and easy to install, the VLF semi-suspension unit can be fitted directly onto the deck or between the seat and a pedestal. The preload can be adjusted by repositioning or adding EPDM shims, with no tools required. Handles can be positioned on either side during installation.
Maintenance
- Inspect mounting bolts and fasteners periodically
- Rinse with fresh water after exposure to saltwater (no high pressure)
- No lubrication required, thanks to EPDM damping elements
Our review
✔ Pros
- Ultra-low profile, ideal for boats with limited space such as bolster
- Lightweight and easy to install
- Long life shock absorber thank to the EPDM shims
- High resistance to corrosion with marine-grade materials
- Clever forward-tilting system prevents water accumulation and allows under-seat access
- Complies with ABYC H-31 standards for maximum safety
✘ Cons
Conclusion
The VLF semi-suspension for boat seat is the perfect solution for boat owners seeking a compact, reliable, and efficient shock-absorbing system. Its minimal footprint and premium construction make it an excellent choice for smaller crafts or installations where height is limited, without compromising comfort and safety at sea.
Good to Know
- The VLF model is the lowest-profile seat suspension in the 4S range.
- Alternative versions (VLW, VLS, FPW, FPS) are available with heights of 75 mm and 98 mm, offering more flexibility.
- EPDM shims are replaceable and allow for fine-tuning preload settings.
- Meets the highest safety and comfort standards, making it suitable for both leisure and professional use.
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