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Sea-Doo RXT-X 300 vs. Yamaha GP1800R SVHO [Video]

Sea-Doo RXT-X 300 vs. Yamaha GP1800R SVHO [Video]

The Yamaha GP1800R SVHO is a purpose-built performance WaveRunner, while the Sea-Doo RXT-X 300 is more of a touring ski on steroids. Despite this, they often act as competitors in the marketplace.

If you want to compare these machines head-to-head, you’ve come to the right place.

We at JetDrift have compiled all you need to know into this RXT-X 300 vs. GP1800R SVHO comparison post!

Sea-Doo RXT-X 300 vs. Yamaha GP1800R SVHO

By the Numbers

Although both of them are classed as Performance jet skis, they are quite different. This is no surprise since the GP1800R SVHO is a smaller race-intended machine while the RTX-X 300 is built on a touring hull.

In terms of specifications, the Yamaha measures 131.9 inches in length, 48.8 inches in width, and 47.2 inches in height.

In contrast, the RXT-X features the larger ST3 touring Sea-Doo hull, which is pretty much the same as you will find under the Fish Pro Trophy and with the convenient GTX touring family.

This massive platform measures 135.9 inches in length, 49.4 inches in width, and 45.2 inches in height.

Compared to the RXT-X 300, the GP1800R SVHO is 75 pounds lighter, since its net weight is only 754 pounds with a curb weight of 880 pounds.

You can expect the dry weight of the Sea-Doo to be 829 pounds, while it weighs 954 pounds when fully loaded. For the best fuel range, both of these skis house a large, 18.5-gallon gas tank.

Although the RXT-X 300 offers an overall storage space of only 26.1 gallons, it includes innovative, easy-access bow storage. This design allows you to reach the front storage compartment of the ski while sitting on the saddle. It’s definitely a game-changer on open waters!

Surprisingly, the Yamaha can carry 28.4 gallons of cargo, despite its smaller hull.

Unlike its Canadian competitor, this WaveRunner is designed with regular bow storage. As compensation, you can find a small removable waterproof storage bin under the rear portion of the seat.

Both skis come with a roomy and comfortable seat rated for three riders.

Regarding engines, the RXT-X 300 houses a supercharged, 4-stroke, 1630cc, fuel-injected, Rotax triple rated at 300 HP.

The power source of the GP1800R SVHO is a supercharged, 1812cc, fuel-injected, Yamaha SVHO marine engine rated at 250 HP.

Both power mills transfer their power to an axial-flow jet pump.


Both the Sea-Doo and the Yamaha come with a wide range of innovative features as standard, including:

They also feature a modern electric brake and reverse system, which is labeled iBR on the Sea-Doo and RiDE on the Yamaha. These systems are almost identical, except for some minor differences.

Just like other performance Sea-Doos, the RXT-X 300 also comes standard with the innovative Ergolock system, including adjustable handlebars, angled footwells, and the Ergolock seat.

Another nice addition to the RXT-X is the optional Tech Package, including the 100W BRP Premium Audio System and the panoramic 7.8-inch display with a smartphone Bluetooth connection.

Performance and Handling

Compared to the RXT-X 300, the GP1800R SVHO is more nimble and turns more aggressively. This is no surprise since its hull is shorter, narrower, and designed for racing.

In contrast, the RXT-X 300 is actually a touring model tuned for performance. It’s built on the revolutionary ST3 platform, which is claimed to be the most stable jet ski hull in the marketplace.

This massive body makes the RXT-X 300 more stable and predictable, but it proves to be less agile and sporty than the Yamaha.

In terms of performance numbers, both skis can go from 5 to 60 mph in about 3.8 seconds while their top speed is electronically limited to 67 mph. With a lightweight rider, they can even reach 68-70 mph on good days.

RXT-X 300 vs. GP1800R SVHO Comparison Chart

For your convenience, we’ve compiled the key specs of these skis into this RXT-X 300 vs. GP1800R SVHO comparison chart:
SpecsGP1800R SVHORXT-X 300
Displacement (cc)18121630
Brake & ReverseYesYes
Length (in)131.9135.9
Width (in)48.849.4
Dry Weight (lbs)754829
Curb Weight (lbs)880954
Fuel Capacity (gal)18.518.5
Storage Capacity (gal)28.426.1
Weight Capacity (lbs)na600
Rider capacity33
These charts are for informational purposes only! For exact specifications, please refer to the factory manual.


The GP1800R SVHO is a true performance ski built on a nimble sport hull, while the RXT-X 300 is a touring model, which is tuned for performance rather than comfort.

Each of these skis has its pros and cons, which are as follows:Pros of the Yamaha GP1800R SVHO:

  • More sporty attitude
  • Lighter weight (754 vs. 829 lbs.)
  • Larger storage capacity (28.4 vs. 26.1 gal.)
  • Smooth, bigger displacement, 4-cylinder engine
  • Higher reliability
Pros of the Sea-Doo RXT-X 300:

If you are undecided between these two skis, don’t hesitate to test ride both to experience the differences.

But as a final word, you can’t go wrong with either of them!