Description
WSJB 400 Aluminum Hull Kit: Pre-Welded for Instant Building!
Tired of waiting? Skip the extensive fabrication! With the WSJB 400 Pre-Welded Hull Kit, you’re not just getting a hull—you’re getting a professionally welded, water-ready foundation for your mini jetboat. This is the ultimate shortcut to getting you and three friends (4 people total) flying across the water, quicker and easier than ever before.
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
Your new hull is designed to let you enjoy the water at full throttle, with zero compromise on safety:
- Unrivaled Stability: Thanks to an aggressive –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—Done For You!
Your hull is built to last using the same precision and strong materials found in professional vessels, with the expert welding already completed by our team.
- Marine-Grade Aluminum: The hull is made from high-quality, corrosion-resistant aluminum. Critical components like the hull-plate and chines are thick, with the rest of the structure made from plate.
- Professionally Welded: All plates are CNC laser-cut and machine-bent before being expertly welded together. You receive a factory-precise, strong, and clean professional finish with all stringers already integrated 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 pre-welded 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 Pre-Welded Kit?
The Pre-Welded Hull Kit is your direct route to rigging and finishing. You’ll receive:
- The Fully Welded Bare Aluminum Hull.
- A high windscreen to shield you and your passengers from spray, wash and branches.
- 2 back seat sections and with integrated hinged engine bay cover (pre-welded).
- A comprehensive Construction Manual (paperback, with PDF available on request) to guide your final assembly, engine, and interior installation.
- A DoC (Declaration of Conformity) to assist with personal registration.
The completed boat has an overall dimension of and an approximate dry weight of only .
Choose Your Build Path:
- Pre-Welded Hull Kit: 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.
- DIY Bare Hull Kit: For welders and hobbyists who want the satisfaction of assembling and finishing the entire hull themselves.
(Packaging in a wooden transport crate for secure, damage-free freight transport is optionally available.)
Are you ready to install your engine and hit the water faster than ever?
Do you have any questions about the best engine or the installation process? Feel free to get in touch!
