Description
WSJB 400 Aluminum Hull Kit: Share the Speed, Share the Fun!
Tired of lonely rides? With the WSJB 400 Hull Kit, you’re not just building a mini jetboat—you’re building a powerful, custom party-starter on the water! This is the ultimate DIY project designed to get you and three friends (4 people total) flying across the water.
Measuring 4.0 meters long and 1.8 meters wide, this model is engineered for both comfort and adrenaline. The WSJB 400 offers the perfect blend of stability and agility for any group seeking water adventure.
Fun and Performance for Four
Designed to let you enjoy the water at full throttle, with zero compromise on safety:
- Unrivaled Stability: Thanks to an aggressive 12-degree deadrise and an integrated trim flap, this boat is incredibly stable on the water. High speeds, sharp turns, and wakes are no issue; tipping is virtually impossible.
- Powerhouse Ready: The hull and engine bay are perfectly matched for the powerful Sea-Doo Rotax ACE 1630 engines, ensuring maximum efficiency and the power you need to plane quickly, even with a full crew.
- Social Layout: The kit includes the capability for two backseats with a hinged engine bay cover, allowing you to maximize passenger comfort and easily access your engine.
Premium Marine-Grade Construction
Built to last, your hull uses the same precision and strong materials found in professional vessels.
- Marine-Grade Aluminum: The kit is made from high-quality, corrosion-resistant aluminum. Critical components like the hull-plate and chines are 5mm thick, with the rest of the structure made from 3mm plate.
- CNC Precision: All plates are CNC laser-cut and machine-bent, ensuring a perfect, factory-precise fit. This makes welding easier and guarantees a clean, professional finish, even for the first-time builder.
- Includes large, welded stringers for maximum structural rigidity and durability.
Customize Your Intake System
We give you the flexibility to complete your build your way:
- The hull plate and transom come standard without cut-outs, allowing you to precisely measure and install your own custom intake assembly.
- Need the easy route? We offer the hull with pre-cut plates designed specifically for Sea-Doo 1630 engine pump installations—just select this option when ordering!
- (Review our Intake Options if you are looking for other pre-fabricated, ready-to-install intake assemblies.)
What’s Included in the DIY Kit?
The DIY Bare Hull Kit is a complete, weld-ready package. In addition to the precision-cut aluminum plates, your kit includes:
- A high windscreen to shield you and your passengers from spray.
- 2 back seat sections and the hinged engine bay cover.
- All necessary hull components (see the complete list below).
- A comprehensive Construction Manual (paperback, with PDF available on request).
- A DoC (Declaration of Conformity) to assist with personal registration.
The completed boat has an overall dimension of 401 x 183 x 146 cm and an approximate dry weight of only 250 kg.
Choose Your Build Path:
- DIY Bare Hull Kit: For welders and hobbyists who want the satisfaction of assembling and finishing the entire hull themselves.
- Fully Welded Option: Skip the fabrication! Order this option and receive a professionally welded hull, allowing you to start immediately with the installation of your engine, steering, and interior.
(Packaging in a wooden transport crate for secure, damage-free freight transport is optionally available.)
Complete WSJB 400 Kit Contents:
- 1 Hull plate
- 2 Chines
- 2 Bow sides
- 1 Foredeck
- 2 Engine bearers (Left + Right)
- 1 Footrest
- 1 Set deck stiffeners (4 pcs)
- 1 Set high window frames (Left + Middle + Right)
- 1 Transom
- 1 Transom middle
- 1 Transom cover
- 2 Sides (Left + Right)
- 2 Transom corners (Left + Right)
- 2 Back Seats
- 1 Engine bay cover
- 1 Construction manual (paperback)
- Incl. DoC for personal registration
Are you ready to build the ultimate four-person fun machine?
Do you have any questions about the best engine or the welding process? Feel free to get in touch!
