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The Sea-Doo GTI 90 was the smallest member of the lively GTI family. Unlike larger GTIs with 130-170hp engines, this model was powered by the much smaller Rotax 900 HO ACE rated at 90hp. Sea-Doo marketed this entry-level GTI 90 from 2017 through 2022.
If you want to find out more about this Recreation Sea-Doo, this post is for you.
We at JetDrift have compiled all you need to know into this Sea-Doo GTI 90 review!
Sea-Doo GTI 90 Review
Sea-Doo GTI 90 History
Believe it or not, Sea-Doo GTIs have been around since 1996 when the Canadian manufacturer revealed the 2-stroke GTI 720.Since then, this ski has undergone many upgrades and eventually grew into an entire model family.
The first 4-stroke GTIs were the 2010 Sea-Doo GTI 130/SE 130, which were heavily upgraded for the 2011 model year.
In 2017, the GTI line borrowed the Polytec hull material and the Rotax 900 HO ACE engine from the Spark series, and the GTI 90 was born.
This model was manufactured from 2017 through 2020, while its “SE” variant was only available in the 2017 and 2018 seasons.
Let’s get down to the nitty-gritty and talk about these skis in detail!
Sea-Doo GTI 90 Hull
Just like any other member of this family, the GTI 90 was also built on the tiny and medium-sized GTI hull. (This platform is still used in other Sea-Doo lines, including the GTR and smaller Wake and Fish Pro models.)
But unlike their predecessors, the hull of the 2017 GTIs was made of Polytec, and the GTI 90 was no exception. This material made its debut on the 2014 Spark, but later found its way into larger Sea-Doo families.
In terms of measurements, the GTI platform measures 132.6 inches in length, 48.5 inches in width, and 44 inches in height.
Unlike the larger ST3 and T3-R hulls, this lively shell features a medium-V design and a low center of gravity.
Sea-Doo GTI 90 Engine
Interestingly, Sea-Doo marketed the GTI with three different engine options in the 2017 model year.
The GTI SE 155 and GTI LTD 155 enjoyed the Rotax 1503 NA rated at 155hp, while the midrange GTI SE 130 housed the Rotax 1503 4-TEC rated at 130hp.
Both of these engines were based on the same 1494cc, SOHC, triple-cylinder Rotax power mills.
Unlike their brothers, the GTI 90 was designed with the much smaller 899cc, 90hp, Rotax 900 HO ACE engine.
Before the introduction of the GTI 90, this engine was exclusively used in the Spark series, which is why it was often referred to as the “Spark engine.”The key specs of this Spark/GTI 90 engine were as follows:
- Type: 4-stroke, Inline-3, 12-valve
- Displacement: 899cc
- Engine power: 66.19kW @ 7300 RPM
- Naturally-aspirated
- Dual over head camshaft (DOHC)
- Compression ratio: 11.0:1
- Water-cooled exhaust system
- Dry sump lubrication system
- Multi-port fuel injection
- Watertight digital ignition
- iTC (Intelligent Throttle Control)
- D-Sea-Bel sound reduction system
- Closed-loop cooling system
- Electric starter
The propulsion system of the GTI 90 was a standard axial-flow, single-stage Sea-Doo jet pump, featuring a three-blade, stainless steel impeller.
Sea-Doo GTI 90 Features
Even though it was marketed as the entry-level model in the Recreation series, the GTI 90 came standard with a wide range of innovative features.
Without the need for completeness, the most important of them were the special DESS key, iTC throttle control, and the innovative iBR brake and reverse system.
The advanced VTS trim system was not available on the base GTI 90, only on the GTI SE 90.
Regarding storage spaces, the top deck of the GTI 90 housed a standard bow storage and a glovebox.
They had a combined capacity of 30.8 gallons, while the fuel capacity of the ski was 15.9 gallons.
Sea-Doo GTI 90 Performance
Let’s face it, the GTI 90 never became popular because of its low engine power. Many riders found this model quite underpowered and with good reason.
While its Rotax 900 HO ACE engine did a good job in the smaller Sea-Doo Sparks, its 90hp was simply not enough for the larger and heavier GTI hull.
The top speed of the GTI 90 was only 40-42 mph and offered poor acceleration.
In contrast, its 130hp siblings topped out at 50-52 mph and the top-of-the-line 155hp GTIs could hit 53-55 mph.
Due to low market interest, Sea-Doo discontinued the GTI 90 after the 2020 season.
Sea-Doo GTI 90 Specs Charts
For your convenience, we’ve compiled the main specifications of the Sea-Doo GTI 90 into these charts:
Sea-Doo GTI 90 Engine Specs
| Engine Specs | Sea-Doo GTI 90 |
|---|---|
| Type | Rotax 900 HO ACE, 4-Stroke, Dual Over Head Camshaft (DOHC) |
| Intake system Type | Naturally Aspirated |
| Declared Power | 66.19 kW @ 7300 RPM |
| Number of cylinders | 3 |
| Number of valves | 12 valves (4 per cylinder) with hydraulic lifters (no adjustment) |
| Displacement | 899 cc (54.9 cu. in) |
| Bore | 74 mm (2.9 in) |
| Stroke | 69.7 mm (2.7 in) |
| Compression ratio | 11.0:1 |
| Fuel injection type | Multipoint fuel injection with iTC (intelligent Throttle Control). |
| Throttle body | Single throttle body (62 mm) with an actuator |
| Starter | Electric |
| Cooling system | Closed-loop cooling system |
Sea-Doo GTI 90 Electrical System
| Electrical System | Sea-Doo GTI 90 |
|---|---|
| Ignition system type | IDI (Inductive Discharge Ignition) |
| Spark Plug Type | NGK, DCPR8E with solid post or equivalent |
| Spark Plug Gap | 0.80 to 0.90 mm (.031 to .035 in) |
| Battery | 12 V, 30 Ah, Electrolyte type |
Sea-Doo GTI 90 Fluids
| Fluids | Sea-Doo GTI 90 |
|---|---|
| Fuel Type | Regular Unleaded |
| Fuel Minimum Octane | 87 Pump Posted AKI (RON+MON)/2, 91 RON |
| Fuel tank capacity (full) | 60 L (15.9 U.S. gal.) |
| Engine oil Type | XPS 4T 5W40 Synthetic blend oil. If not available, use SAE 5W40 API service SM motor oil |
| Engine oil Capacity | 2.01 L (2.1 qt (U.S. liq.)) oil change w/filter |
| Cooling system capacity | 4.3 L (4.5 qt (U.S. liq.)) total |
Sea-Doo GTI 90 Propulsion System
| Propulsion system | Sea-Doo GTI 90 |
|---|---|
| Propulsion system | Sea-Doo jet pump with iBR |
| Jet Pump type | Axial flow, single stage. Large hub with 10-vane stator |
| Jet Pump material | Aluminum |
| Impeller | Stainless steel |
| Transmission | Direct drive |
Sea-Doo GTI 90 Dimensions and Capacities
| Dimensions and Capacities | Sea-Doo GTI 90 |
|---|---|
| Number of passengers (Driver incl.) | 3 |
| Load limit (passenger(s) and luggage, including accessories) | 600 lb |
| Storage capacity | 116.6 L (30.8 U.S. gal.) |
| Weight (dry) | 291 kg (640 lb) |
| Overall Length | 336.8 cm (132.6 in) |
| Overall Width | 123.1 cm (48.5 in) |
| Overall Height | 111.8 cm (44 in) |
These charts are for informational purposes only! For exact specifications, please refer to the factory manual.
Takeaways
As a takeaway, we’ve answered the most common questions about the Sea-Doo GTI 90:
What is a Sea-Doo GTI 90?
The Sea-Doo GTI 90 was an entry-level Recreation Sea-Doo model.
When did the Sea-Doo GTI 90 Come Out?
The Sea-Doo GTI 90 was introduced in 2017.
What Size was a Sea-Doo GTI 90?
The Sea-Doo GTI 90 measured 132.6 inches in length, 48.5 inches in width, and 44 inches in height.
How Much Did a Sea-Doo GTI 90 Weigh?
The dry weight of the Sea-Doo GTI 90 was 640 pounds (2017 model).
How Many People Could Ride on a Sea-Doo GTI 90?
The Sea-Doo GTI 90 was rated for three riders.
What Kind of Engine was in the Sea-Doo GTI 90?
The Sea-Doo GTI 90 was powered by a 4-stroke, Rotax 900 HO ACE engine.
Was the Sea-Doo GTI 90 Supercharged?
The Sea-Doo GTI 90 utilized a naturally aspirated engine.
Was the Sea-Doo GTI 90 a 4-Stroke?
The Sea-Doo GTI 90 was powered by a 4-stroke engine.
How Much HP Did a Sea-Doo GTI 90 Have?
The Sea-Doo GTI 90 produced 90hp in stock condition.
How Much Fuel Did a Sea-Doo GTI 90 Hold?
The fuel capacity of the Sea-Doo GTI 90 was 15.9 gallons.
How Much Oil Did a Sea-Doo GTI 90 Hold?
The Sea-Doo GTI 90 required 2.1 US quarts of oil with filter.
How Much Weight Could a Sea-Doo GTI 90 Hold?
The weight capacity of the Sea-Doo GTI 90 was 600 pounds.
How Much Gear Could a Sea-Doo GTI 90 Carry?
The total storage capacity of the Sea-Doo GTI 90 was 30.8 gallons.
How Fast Did a Sea-Doo GTI 90 Go?
The top speed of a Sea-Doo GTI 90 was 40-42 mph out of the box.
Could the Sea-Doo GTI 90 Tow a Skier or a Wakeboarder?
Due to its three-rider saddle, the Sea-Doo GTI 90 could legally tow a skier or wakeboarder. However, it wasn’t the best Sea-Doo for tow sports due to its underpowered engine.
Did the Sea-Doo GTI 90 Have a Reverse?
The Sea-Doo GTI 90 came standard with an electric reverse system.
Did the Sea-Doo GTI 90 Have a Brake?
The Sea-Doo GTI 90 was designed with the iBR brake and reverse system.
How Much Does a Sea-Doo GTI 90 Cost?
The asking price of a used Sea-Doo GTI 90 varies between $4,000 and $9,000 depending on the year and its condition.
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