2021 Sea-Doo RXT-X 300 Boat in Bismarck, ND US
RXT-X 300
1 Engine (--)
11.3 feet
Gas
Other
Experience championship-level performance with this 2021 Sea-Doo RXT-X 300, one of the most powerful and feature-packed personal watercraft on the market. Powered by a supercharged 300 HP Rotax® 1630 ACE™ engine, the RXT-X 300 delivers exhilarating acceleration, exceptional top-end performance, and precise handling for riders who demand the best.
Built on Sea-Doo's stable ST3 Hull, this premium performance watercraft offers a smooth, confident ride in a variety of water conditions while maintaining outstanding cornering capability. The Ergolock™ racing seat, adjustable handlebar, and intelligent throttle control provide maximum comfort and control whether you're cruising, carving turns, or towing.
Loaded with premium features including Intelligent Brake & Reverse (iBR®), Variable Trim System (VTS™), a large front storage compartment, watertight phone compartment, reboarding ladder, and a high-resolution digital display, the RXT-X 300 combines cutting-edge technology with unmatched performance.
Whether you're looking for adrenaline-pumping speed, all-day comfort, or one of the most sought-after performance jet skis available, this 2021 Sea-Doo RXT-X 300 is ready for your next adventure.
Key Features:
Supercharged 300 HP Rotax® 1630 ACE™ engine
ST3 Hull for exceptional stability and handling
Intelligent Brake & Reverse (iBR®)
Variable Trim System (VTS™)
Ergolock™ performance seat
Large front storage compartment
Digital display with intelligent throttle control
Premium performance and luxury features
Ideal for performance riding, cruising, and watersports
Don't miss your opportunity to own this high-performance 2021 Sea-Doo RXT-X 300. Contact us today for more information or to schedule a viewing.
Price History
| Date | Event | Price |
|---|---|---|
| 7/10/26 | Initial price | $14,999 |
2021 Sea-Doo RXT-X 300 Video Tours
Sea-Doo RXT-X 300: BoatTEST Review
Overview
The Sea-Doo RXTX 300 is a high-performance watercraft designed to deliver speed and exceptional handling even in challenging water conditions. It accommodates up to three riders and emphasizes a strong connection between the machine and the rider through advanced ergonomic and technological features. This watercraft is suitable for both thrill-seekers and families, offering ample storage and ease of use around docks.
Exterior Design and Ergonomics
The RXTX 300 features clean lines with subtle angular geometry, complemented by integrated, fully adjustable mirrors positioned safely within the dock strike zone. A standout aspect of its design is the Ergolock system, developed with input from an ergonomics expert to make the vehicle an extension of the rider. This system includes a footwell with distinct positions for cruising and cornering, a redesigned seat that locks the rider in place by allowing the knees to press inward, and a raised seat back that provides additional support. Together, these elements create a triangular support system enhancing rider control and comfort.
Control and Technology
The RXTX 300 incorporates several advanced control features starting with the Adjustable Ergonomic Steering (AES), which allows the handlebars to be rotated and adjusted in and out with guide marks ensuring symmetry. Uniquely, the gauges adjust in tandem with the handlebars for optimal visibility. The left handlebar hosts the start-stop button, a palm-rest grip, the Intelligent Brake and Reverse (IBR) lever for safe stopping and maneuvering, the Variable Trim System (VTS) for adjusting riding attitude, and mode toggles between Touring, Sport, and Eco for performance or fuel efficiency. The right handlebar controls the digital display, allowing the rider to cycle through information such as speed, lap timer, fuel consumption, and trim parameters.
Power and Storage
Beneath the hinged seat, supported by a gas strut, lies a redesigned 1630cc supercharged and intercooled engine. This engine is 9% larger than its predecessor and delivers 15% more power. Storage options include a watertight compartment under the front visor with a removable insert, secure storage for safety equipment such as a fire extinguisher and flares, and a large rear deck that facilitates boarding and towing. The RXTX 300 is tow-friendly, equipped with a rear hook and multiple handholds for passengers. Additionally, retractable dock lines are conveniently located at the sides and stern, eliminating the need to carry extra lines.
Performance and Handling
On the water, the RXTX 300 demonstrates highly responsive and instantaneous acceleration and maneuverability. Although top speed is regulated by Coast Guard agreements, the watercraft maintains impressive fuel efficiency, consuming 6.4 gallons per hour at 40 mph, 9.8 gallons per hour at 50 mph, and 14.8 gallons per hour at 60 mph. These figures allow for up to an hour of run time with a 10% fuel reserve. The combination of performance, handling, and the Ergolock system provides a ride that balances the thrill of speed with comfort and control, even in less than ideal water conditions.
Conclusion
The Sea-Doo RXTX 300 stands out as a muscle car on the water, blending high performance and precise handling with ergonomic comfort and advanced technology. Its design and features foster a strong connection between rider and machine, enhancing both enjoyment and control. This watercraft is well-suited for riders seeking speed without sacrificing comfort or practicality.
Overview from around the web 2021 Sea-Doo RXT-X 300
The 2021 Sea-Doo RXT-X 300 has garnered a lot of positive feedback from customers, highlighting its impressive performance and advanced features
Riders appreciate its powerful 300 HP engine, which delivers outstanding acceleration and top speeds, making it a thrilling choice for adrenaline seekers. The stability and handling in various water conditions are often praised, with many users noting that it provides a smooth and controlled experience, even in choppy waters. Customers also commend the ergonomic design and comfort of the seating, making it ideal for long rides. The innovative iDF (Intelligent Debris Free) technology is a standout feature, offering peace of mind by allowing riders to clear intake debris without leaving their seat. Additionally, the customizable digital display provides essential information at a glance, further enhancing the riding experience. Overall, customers are enthusiastic about the RXT-X 300's combination of performance, comfort, and cutting-edge technology, solidifying its reputation as a top choice in the personal watercraft market.
The Biggest Pros and Cons
Pros
Powerful Performance: Equipped with a robust 300 HP engine, the RXT-X 300 delivers exhilarating acceleration and top speed, making it ideal for thrill-seekers.
Stable Handling: The innovative hull design provides exceptional stability and control, whether you're cruising on flat water or tackling rough waves.
Advanced Features: Comes with a comprehensive range of high-tech features, including the Intelligent Brake and Reverse (iBR), which enhances safety and maneuverability.
Comfortable Ride: The ergonomic design and adjustable handlebars ensure comfort during long rides, allowing you to enjoy extended adventures without fatigue.
Versatile Storage: With ample storage space, this model allows you to conveniently stow away gear, making it perfect for day trips or weekend getaways.
Enhanced Suspension: The RXT-X 300 features a manually adjustable suspension system that absorbs impacts, providing a smoother ride on choppy waters.
Sleek Design: A sporty aesthetic coupled with a modern look makes the RXT-X 300 as stylish as it is functional.
Cons
Price Point: The RXT-X 300 is on the higher end of the price spectrum, which may not appeal to budget-conscious buyers.
Weight: While the construction adds stability, the heavier weight might affect handling in certain conditions, especially for less experienced riders.
Maintenance Costs: Higher performance often comes with increased maintenance needs, potentially leading to more significant ongoing costs.
Fuel Efficiency: With great power comes greater fuel consumption; the RXT-X 300 may burn through fuel quicker than lower-powered models, especially during aggressive riding.
Learning Curve: New riders may find the powerful engine intimidating and may require some time to master the controls and handling. The 2021 Sea-Doo RXT-X 300 is a thrilling option for those seeking high performance and advanced features in a personal watercraft, but potential buyers should weigh these pros and cons based on their own experience and riding needs.
Made For
The 2021 Sea-Doo RXT-X 300 is designed for thrill-seekers and water sports enthusiasts looking for an exhilarating ride on the waves. With its powerful 300 horsepower engine, this personal watercraft is perfect for adrenaline junkies who crave speed and performance. Whether you're racing through choppy waters or carving tight turns, the RXT-X 300 delivers unmatched stability and control, making it ideal for both experienced riders and those looking to enhance their skills. Its dynamic features, like the innovative Closed-Loop Cooling System and the intelligent throttle control, provide a seamless riding experience, allowing users to focus on the fun. Additionally, the RXT-X 300 is equipped with advanced technology, such as the Sea-Doo's exclusive Variable Trim System (VTS), enabling riders to adjust the watercraft's angle for optimal performance in various conditions. This model also caters to those who enjoy long days on the water, featuring ample storage space for all your gear and a comfortable seating arrangement for up to three passengers. In summary, the 2021 Sea-Doo RXT-X 300 is perfect for those who demand high performance, robust features, and a thrilling experience on the water, making it a top choice for adventurers and families alike.
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Meet the Broker

Address
Boat Location
Contact Vallely Sport & Marine - Bismarck about 2021 Sea-Doo RXT-X 300
2800 E. Bismarck Expressway, Bismarck, ND, 58504










