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Sea-Doo RXT-X 300 Review: Top Speed, HP, Prices & More

Sea-Doo RXT-X 300 Review: Top Speed, HP, Prices & More

Update: The upgraded RXP-X 325 has arrived with the high-end 325hp engine option!The Sea-Doo RXT-X 300 is one of the most aggressive flagship models in the 2023 Sea-Doo lineup.

If you’re looking for the most powerful and ultra-fast Sea-Doo, the new RXT-X with its 300 HP supercharged engine is for you. (Besides the racing-class Sea-Doo RXP-X 300, of course).

If you want to get to know more about the RXT-X, this post is for you. We, at JetDrift, have gathered the most important specs, pictures and test videos into this post for your convenience.

Beyond that, we will compare the RXT-300 and the RXP-X 300 in one chart, by the numbers!

If you’re also interested in competing models, don’t hesitate to take a look into our model browser and comparison tool where you can compare the new performance personal watercraft (PWC) models head-to-head.

But now, without further ado, let’s start the Sea-Doo RXT-X 300 review!

Sea-Doo RXT-X 300 Review

Hull and Design

The Sea-Doo RXT-X 300 arrives with its legendary fiberglass ST3 hull. You can find the same hull under the GTX family, RXT-230, Fish Pro and the Wake Pro 230.

This new lightweight hull is surprisingly stable, thanks to the lower center of gravity and greater width. Compared to the previous design, you can find the seat 1.4” lower, while riders sit 3” lower. Moreover, Sea-Doo designed the footwells deeper and roomier for maximum comfort.

According to Sea-Doo, this is the best offshore platform in the fleet and also the most stable on the market, simultaneously. This Sea-Doo is so stable on the water that you can even re-board from the side easily!

As you can see, the ST3 hull is super stable, which means higher comfort and security, since it’s less likely to overturn.

On the other hand, this advantage can be a disadvantage at the same time, as many PWC enthusiasts consider these large models boats and are looking for smaller and more dynamic models.

But despite its large dimensions, the ST3 hull (135.9” long x 49.4” wide), it’s still quite responsive and makes turns very well. While going straight at a lower speed, you may find it slightly unstable, but if you go faster, the stability will increase.

The main advantage of the new hull design is that it does a great job on rough water, because it’s steady on choppy water, but also predictable while making turns.

2020 Sea-Doo RXT-X 300 top speed: 67 mphBeyond its dimensions, the weight of the platform also changes.

Thanks to the new design, the new RXT-X is 86 pounds lighter compared to its predecessor. This means the Sea-Doo RXT-X’s dry weight is no less than 828 pounds, while the curb weight is 953 pounds without the rider and necessary safety gear.

When it comes to swim platforms, there’s no doubt that Sea-Doo proudly offers the largest rear platform in the industry. The size of this area can be critical in situations like re-boarding after watersports, carrying items, sunbathing, or even PWC fishing.

Moreover, you can gain extra space by removing the rear part of the seat. This modular seat offers a variety of uses since it can even be mounted inversely so you can have a picnic on the water!

If you want to ride with passengers, with the standard seat arrangement, the RXT-X can carry 3 riders easily and legally.

Regarding its colors, to the regret of many fans, the popular and flashy Neon Yellow has been replaced with the slightly moderated California Green, while the Black/Lava Red design remains unchanged.

If you’d like to learn more about the ST3’s hull, don’t miss this detailed review:


It’s safe to say that the RXT-X 300 engine is a small power plant. Namely, it’s the ROTAX 1630 ACE, which is currently the most powerful Sea-Doo engine on the market.

This 4-stroke, 3-cylinder, 1630cc supercharged power source offers no less than 300 HP, and uses closed-loop system, exclusive in the PWC industry.

You can find the same engines in many other performance Sea-Doo models just like in the RXP-X.

Since RXT-X and RXP-X are closely related (and many customers deliberate between these two) it makes sense to compare them.

Sea-Doo RXT-X 300 vs. RXP-X 300

SpecsGP1800R SVHORXP-X 300RXT-X 300ULTRA 310R
MSRP ($)$14 749$15 799$16 799$16 499
Performance (HP)250300300310
Displacement (cc)1812163016301498
Top Speed (mph)67676767
Acceleration 0-30 mph (s)1,52,21,5NA
Net Weight (Lbs)772843829908
Curb Weight (Lbs)8989529541 047
Fuel Capacity (Gal)18,515,918,520,6
Power to Curb weight ratio HP/Lbs0,280,320,310,30
Length (")131,9130,6135,9132,7
Width (")48,849,249,447,0
Height (")47,245,345,245,3
When it comes to the Sea-Doo RXP-X vs. RXT-X comparison, the most important thing to emphasize is that although they look similar, they arrive with a different hull.

While the RXP-X 300 has the aforementioned ST3 hull, the RXP-X 300 is designed on the fiberglass S3 platform.

This deep V-shape design offers outstanding control for the quickest turns and most precise handling. That’s why this is the favorite choice of the official Sea-Doo racers!

It’s an interesting fact that the RXT-X previously used this S3 design as well, but now the RXP-X 300 is the only Sea-Doo which is still manufactured with this hull.

Sea-Doo identifies the RXP-X’s hull as a “medium-sized platform” because it’s only 130.6” long and 48.3” wide. It means this is 5.3” shorter and 1.1” slimmer than the RXT, while their weight is roughly the same.

Thanks to its smaller size and unique racing design, the RXP-X 300 turns more aggressively while offering less comfort and stability. The special ErgolockTM is also a great help during the leans as it pulls the rider to the machine.

The other really important difference is that the RXP can carry only 2 riders, and according to the manufacturer, you are not allowed to tow wakeboarders or tubers with this craft.

Sea-Doo RXT-X Top Speed and Acceleration

How fast is a Sea Doo RXT-X 300? – is a typical question of many performance-minded buyers.

Just like the other performance PWC models on the US market, the Sea-Doo RXT-X 300’s top speed is 67 mph, thanks to a factory-installed speed limiter. (Outside the US, you can expect even higher top speeds.)

Beyond the thrilling top speed, the RXT-X also offers extreme acceleration, as it will take you from 0 to 30 mph in 1.5 seconds, while 0 to 60 mph in 3.6 seconds (using a running start).

When it comes to riding experience, it should not be restricted solely to the numbers, of course.

The riding position is convenient but aggressive at the same time, thanks to the deeper angled footwells, five-position tilt steering, and the narrow Ergolock seat (available in the X package as an option).

RXT-X 300 Features and Accessories


It’s safe to say that nowadays most PWC models are equipped with braking systems, and the RXT-X 300 is no exception.

Introduced in 2009, Sea-Doo’s iBR was the first braking system in the PWC industry which is now in its third generation. The iBR allows the rider to stop up to 160 feet sooner, which is also a great help at docking and doing other maneuvers at low speed.

The key part of the iBR is the reverse gate behind the pump which turns the waterjet forward. In this way, the thrust doesn’t speed up, but slows down the Sea-Doo.

You can discover Sea-Doo’s iBR and compare it to Yamaha WaveRunner’s braking system (RiDE) here.

Cruising Control

Not only the iBR, but the cruise controls are also at your service during your rides. You can choose from the ECO, Touring or Sport mode for different power levels.

This is a cool feature as you can choose the best mode according to your goals, skills and weather conditions.


The RXT-X features the VTS (Variable Trim System) which means you can set the trim manually on the handlebar based on the water conditions or the weight distribution.

Moreover, the RXT-X also offers a special launch control for perfect maximum acceleration (optional). It adjusts the angle of the trim automatically according to the circumstances to avoid porpoising.

This feature can also be directly activated from the handlebar by holding both trim buttons.


The ST3 platform also has a unique direct-access front storage.

You can access this water-resistant storage by raising the whole handlebar unit. This means you can reach all of your gear easily and effortlessly without standing up from the seat.

Beyond this storage, you can find a smaller glovebox (which houses a watertight case) in front of you, which can even be requested with an integrated USB port as an option.

This is a perfect place for your smartphone or action camera. With the glovebox, the RXT-X 300’s total storage capacity is 26.1 gallons.

Sea-Doo RXT-X 300 front storage


The RXT-X 300 features a bigger, 7.6” wide LCD display with large numbers for better visibility. As a new addition, its backlight is dimmed automatically based on the environment light.

LinQ System

Storage on the rear platform is not an issue anymore with Sea-Doo’s unique LinQ system. You can fix a cooler, bag or even a fuel caddy easily on the platform using the factory-installed connectors. If these units aren’t in use, you can hide them away completely.

Audio System

The fully-integrated audio system is available for the RXT-X as an option. It’s not just completely waterproof (which is the bare minimum on a PWC) but it has 100W of total power, Bluetooth connectivity and remote controls for easier handling.

The X Package

The X package consists of a few optional performance accessories which can make this Sea-Doo more aggressive.

The package includes the X-Sponsons for better stability, the angled footwell wedges, the ErgoLock narrow race-style seat, and the adjustable X-steering. This special Sea-Doo performance package is highly recommended – and not just for racers!


The new Sea-Doo RXT-X is an amazing machine that is definitely worth a look if you are looking for a performance PWC.

It arrives with the ST3 platform, which offers the greatest stability in the industry; you can re-board even from the side of the machine!

When it comes to the engine, it’s a 4-stroke, 3-cylinder, supercharged Rotax 1630 ACE producing thrilling 300HP. With this power plant, the RXT-X 300 can hit (limited) 67 mph and it can take the rider from 0-30 mph in 1.5 seconds, and 0-60 mph in around 3.6 seconds.

With a price tag of $16,199 (USD, MSRP) the new RTX-X 300 is not the cheapest Sea-Doo on the market, but according to many fans, it’s worth every penny.

If we take a look at the competitor models, we can find the Yamaha’s GP1800R SVHO, as well as the Kawasaki ULTRA 310 Jet Ski in the same price range.

As an option, you can upgrade the RXT-X with the Bluetooth audio system, the performance package or even with some useful LinQ accessories. Beyond these, don’t forget to leave room in your budget for taxes, registration fees and the trailer, of course, which does not come with PWCs contrary to popular belief.

You may also want some safety or watersports accessories, but the list of the PWC accessories is nearly endless. (However, we’ve attempted to collect all of them under one roof!)

This was our brief Sea-Doo RXT-X review. We hope it will help you make your purchasing decision!

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