Mariah FS20 Fish & Ski 2007 boat specs
Mariah
Mariah FS20 Fish & Ski 2007
2007
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VS
Mariah G21  2009 boat specs
Mariah
Mariah G21 2009
2009
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Mariah FS20 Fish & Ski 2007 vs Mariah G21 2009 — Same Brand, Different Boat

The Mariah FS20 Fish & Ski 2007 vs Mariah G21 2009 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.

On paper these two are close siblings in the size department — Mariah FS20 Fish & Ski 2007 at 2,0 ft versus Mariah G21 2009 at 2,0 ft. At 33 lbs and 39 lbs respectively, both sit in a similar weight class — either should pair comfortably with most mid-size SUVs and half-ton trucks, though always confirm your specific tow rating with the motor added.

Both boats share a closely matched power ceiling — 260 hp for the Mariah FS20 Fish & Ski 2007 and 270 hp for the Mariah G21 2009. 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 Mariah G21 2009 carries 44 gallons versus 38 gallons in the Mariah FS20 Fish & Ski 2007. On a lake day that's negligible, but for coastal cruising or long reservoir runs the extra range matters.

Both boats are rated for 1 passengers — a good fit for a family of four or five plus guests. Comfort at capacity is another matter; the longer hull typically means more seat options and better weight distribution.

At this size, power-to-weight ratio matters more than outright horsepower. The Mariah G21 2009 comes in at 0 lbs per hp versus 0 lbs per hp for the Mariah FS20 Fish & Ski 2007. The lower the ratio the more explosive the acceleration — meaningful on a short RIB where bursts of speed, quick planing, and agility in surf or tight waterways define the experience.

The Mariah G21 2009 has a documented top speed of 41 mph. Speed data wasn't available for the other model.

Bottom line: The Mariah FS20 Fish & Ski 2007 and Mariah G21 2009 are closely matched on the specs that matter most. Test-ride both on the water you actually use, check current dealer pricing, and factor in long-term service access before you sign.
General Boat Info
MakeMariah
MakeMariah
ModelFS20 Fish & Ski
ModelG21
Model Year2007
Model Year2009
Measurements / Dimensions
Beam8 ft. 2 in. (2.5 m)
Beam8 ft. 6 in. (2.6 m)
Beam - Meters2.49
Beam - Meters2.59
Beam - Inches98
Beam - Inches102
Deadrise19℃
Deadrise20℃
Weight - Detail3,300 lbs. (1,498 kg)
Weight - Detail3,300 lbs. (1,497 kg) Maximum: 3,900 lbs. (1,769 kg)
Weight - kg1496.85
Weight - kg1769.01
Weight - lbs.33
Weight - lbs.39
Length - Meters6.1
Length - Meters6.1
Length - Feet2
Length - Feet2
Length overall - Detail20 ft. 0 in. (6.1 m)
Length overall - Detail20 ft. 9 in. (6.1 m)
Length overall - Meters6.1
Length overall - Meters6.32
Length overall - Inches24
Length overall - Inches249
Length - Inchesnot available
Length - Inches9
Body / Hull
Hull materialFiberglass
Hull materialFiberglass
Hull typenot available
Hull typeModified Vee
Engine and Drivetrain
Fuel tank capacity - Detail38 gal. (144 l)
Fuel tank capacity - Detail44 gal. (167 l)
Fuel tank capacity - Liters143.85
Fuel tank capacity - Liters166.56
Fuel tank capacity - Gal38
Fuel tank capacity - Gal44
Fuel typeGas
Fuel typeGas
Drive typeI/O
Drive typeI/O
Engine max260 hp (194 kW)
Engine max270 hp (201 kW)
Operational Info
Maximum capacityPerson: 1,590 lbs. (721 kg) Total: 3,550 lbs. (1,612 kg)
Maximum capacity1,750 lbs. (794 kg)
Maximum people1
Maximum people1
Performance
Maximum speednot available
Maximum speed41-52 mph

Mariah FS20 Fish & Ski 2007 vs Mariah G21 2009 — Common Questions

Which is the larger boat — the Mariah FS20 Fish & Ski 2007 or the Mariah G21 2009?
The Mariah G21 2009 is the longer of the two at 2,0 feet overall. The Mariah FS20 Fish & Ski 2007 comes in at 2,0 feet, making it roughly 0,0 ft shorter — a meaningful difference in deck room and overall on-water presence.
Which is easier to trailer — the Mariah FS20 Fish & Ski 2007 or the Mariah G21 2009?
For trailering, the Mariah FS20 Fish & Ski 2007 has the edge at 33 lbs dry weight versus 39 lbs for the Mariah G21 2009. Add a motor (typically 300–500 lbs for an outboard in this class), gear, and a partial fuel load and the difference grows. Lighter is friendlier on smaller tow vehicles and on fuel economy while hauling.
Which boat can handle a bigger outboard?
The Mariah G21 2009 is rated to a maximum of 270 hp, giving it the larger power ceiling. The Mariah FS20 Fish & Ski 2007 tops out at 260 hp. Keep in mind that maximum ratings are just that — matching the motor to the actual load and usage pattern usually matters more than chasing the ceiling.
How many people can each boat hold?
The Mariah FS20 Fish & Ski 2007 is Coast Guard rated for 1 passengers, while the Mariah G21 2009 is certified for 1. 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 has the better power-to-weight ratio?
The Mariah G21 2009 has a better power-to-weight ratio at 0 lbs per hp compared to 0 lbs per hp for the Mariah FS20 Fish & Ski 2007. A lower number means quicker acceleration and faster time to plane — the number that actually matters most on short, sporty boats like these.
Which boat is wider, and does it affect trailering?
The Mariah G21 2009 measures 102" wide, compared to 98" for the Mariah FS20 Fish & Ski 2007. 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 Mariah FS20 Fish & Ski 2007 or the Mariah G21 2009?
The Mariah G21 2009 has the bigger tank at 44 gallons, versus 38 gallons on the Mariah FS20 Fish & Ski 2007. That 6-gallon difference translates to roughly 18–30 nautical miles of additional range at cruising speed, depending on motor, load, and conditions.
Are the Mariah FS20 Fish & Ski 2007 and Mariah G21 2009 from the same manufacturer?
Yes — both the Mariah FS20 Fish & Ski 2007 and the Mariah G21 2009 are built by Mariah. 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.