Sea-Doo GTX 170 2027 boat specs
Sea-Doo
Sea-Doo GTX 170 2027
2027
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VS
Sea-Doo Speedster SK 1999 boat specs
Sea-Doo
Sea-Doo Speedster SK 1999
1999
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Sea-Doo GTX 170 2027 vs Sea-Doo Speedster SK 1999: Same Brand, Different Boat

The Sea-Doo GTX 170 2027 vs Sea-Doo Speedster SK 1999 comparison sits squarely in the category of decisions where specs alone won't tell the whole story: intended use, storage, and long-term ownership costs all factor in.

Both boats share a closely matched power ceiling - 170 hp for the Sea-Doo GTX 170 2027 and 170 hp for the Sea-Doo Speedster SK 1999. Real-world performance will come down more to which motor is actually bolted on, its load at the time, and whether it's a 4-stroke or 2-stroke setup. Fuel capacity breaks the other way: the Sea-Doo Speedster SK 1999 carries 40 gallons versus 19 gallons in the Sea-Doo GTX 170 2027. On a lake day that's negligible, but for coastal cruising or long reservoir runs the extra range matters.

For family outings this is probably the sharpest distinction between the two. The Sea-Doo Speedster SK 1999 is rated for 4 passengers, while the Sea-Doo GTX 170 2027 caps at 3. If you're regularly pulling extended family or a group of friends onto the water, the extra seats on the Sea-Doo Speedster SK 1999 could be the deciding factor.

Bottom line: Choose the Sea-Doo Speedster SK 1999 if your priority is putting more people on the water - it handles 4 passengers and at 16,0 ft it has the deck room to back that rating up comfortably. The Sea-Doo GTX 170 2027 is the smarter pick if you want a lighter, easier-to-trailer boat rated for 3 that costs less to run day-to-day.
General Boat Info
MakeSea-Doo
MakeSea-Doo
ModelGTX 170
ModelSpeedster SK
Model Year2027
Model Year1999
Weight - Detail795.87 lbs. (361 kg)
Weight - Detailnot available
Weight - kg361
Weight - kgnot available
Weight - lbs.795.87
Weight - lbs.not available
UsePersonal watercraft
Usenot available
Measurements / Dimensions
Length overall - Detail11 ft. 4 in. (3.45 m)
Length overall - Detail16 ft. 6 in. (5.03 m)
Length overall - Inches135.83
Length overall - Inches198
Length overall - Meters3.45
Length overall - Meters5.03
Length - Feet11.32
Length - Feet16
Beam - Inches49.21
Beam - Inches91
Beam - Meters1.25
Beam - Meters2.31
Height - Detail44.88 in. (1.14 m)
Height - Detailnot available
Height - Inches44.88
Height - Inchesnot available
Height - Meters1.14
Height - Metersnot available
Beamnot available
Beam7 ft. 7 in. (2.31 m)
Draft [max] - Detailnot available
Draft [max] - Detail12 in. (.3 m)
Draft [max] - Metersnot available
Draft [max] - Meters0.3
Draft [max] - Inchesnot available
Draft [max] - Inches12
Weight - Detailnot available
Weight - Detail1,710 lbs. (777 kgs)
Weight - kgnot available
Weight - kg775.64
Weight - lbs.not available
Weight - lbs.1710
Length - Metersnot available
Length - Meters5.03
Length - Inchesnot available
Length - Inches6
Body / Hull
Hull materialFiberglass
Hull materialnot available
Hull typeST3 hull
Hull typenot available
Engine and Drivetrain
Drive typeJet propulsion
Drive typeJet Drive
Fuel typeGasoline
Fuel typenot available
Engine max170 hp
Engine max170 hp
Fuel tank capacity - Liters70
Fuel tank capacity - Liters151.42
Fuel tank capacity - Gal18.5
Fuel tank capacity - Gal40
Horsepower170 hp
Horsepowernot available
Engine/s standardSingle engine
Engine/s standardTwin Rotax 718 cc, Twin Cylinder, Two Stroke, Liquid Cooled, and R.A.V.E
Engine makeRotax
Engine makenot available
Engine model1630 ACE (1,630 cc)
Engine modelnot available
Max no of engines1
Max no of enginesnot available
Impellernot available
ImpellerProgressive pitch, stainless steel
Jet pumpnot available
Jet pumpAxial flow, single stage
Fuel systemnot available
Fuel systemMikuni BN 40-38 per engine with accelerator pumps
Fuel tank capacity - Detailnot available
Fuel tank capacity - Detail40 gal. (151 l)
Batterynot available
Battery12-volt
Lubricationnot available
LubricationVariable Rate Oil Injection
Oil capacity - Detailnot available
Oil capacity - Detail2.3
Oil capacity - Litersnot available
Oil capacity - Liters8.71
Operational Info
Maximum people3
Maximum people4
Maximum capacity273 kg
Maximum capacity905 lbs. (410 kgs)
Boat typePower
Boat typenot available
Storage98.9 L total
Storagenot available
Warranty Info
Warranty2 year BRP limited watercraft warranty
Warrantynot available
Options / Other
OptionsLinQ front supports; removable storage-bin and mesh organizers; ski pylon; wakeboard rack; boarding ladder; touring windshield; floorboard wedges; audio; rear floating-mat holder.
Optionsnot available

Sea-Doo GTX 170 2027 vs Sea-Doo Speedster SK 1999 - Common Questions

Which is the larger boat - the Sea-Doo GTX 170 2027 or the Sea-Doo Speedster SK 1999?
The Sea-Doo Speedster SK 1999 is the longer of the two at 16,0 feet overall. The Sea-Doo GTX 170 2027 comes in at 11,3 feet, making it roughly 4,7 ft shorter - a meaningful difference in deck room and overall on-water presence.
How many people can each boat hold?
The Sea-Doo GTX 170 2027 is Coast Guard rated for 3 passengers, while the Sea-Doo Speedster SK 1999 is certified for 4. Note that legal capacity and comfortable capacity aren't always the same thing - on a full day out, most experienced boaters aim for about 80% of the rated number to keep things comfortable.
Which boat is wider, and does it affect trailering?
The Sea-Doo Speedster SK 1999 measures 91" wide, compared to 49" for the Sea-Doo GTX 170 2027. The US standard-width towing limit is 8’6" (102") in most states - anything over that may need a wide-load permit. Confirm your specific route requirements with each state's DOT.
Which boat has the larger fuel tank - the Sea-Doo GTX 170 2027 or the Sea-Doo Speedster SK 1999?
The Sea-Doo Speedster SK 1999 has the bigger tank at 40 gallons, versus 19 gallons on the Sea-Doo GTX 170 2027. That 21-gallon difference translates to roughly 64–107 nautical miles of additional range at cruising speed, depending on motor, load, and conditions.
Are the Sea-Doo GTX 170 2027 and Sea-Doo Speedster SK 1999 from the same manufacturer?
Yes - both the Sea-Doo GTX 170 2027 and the Sea-Doo Speedster SK 1999 are built by Sea-Doo. That means shared dealer networks, common parts availability, and consistent build quality across the line. The choice between them is essentially a question of how much boat you need, not which brand you trust.