Mariah FS18 Fish & Ski 2007 boat specs
Mariah
Mariah FS18 Fish & Ski 2007
2007
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Mariah G270 2011 boat specs
Mariah
Mariah G270 2011
2011
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Mariah FS18 Fish & Ski 2007 vs Mariah G270 2011 — Same Brand, Different Boat

The Mariah FS18 Fish & Ski 2007 vs Mariah G270 2011 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.

Size is the most obvious dividing line here. The Mariah G270 2011 measures 27,0 feet overall (2011), giving it roughly 9,0 additional feet of deck space compared to the Mariah FS18 Fish & Ski 2007 at 18,0 feet (2007). Weight tells a clearer story for trailering families: the Mariah FS18 Fish & Ski 2007 tips the scales at 295 lbs — 213 lbs more than the Mariah G270 2011 at 82 lbs. That difference is meaningful if you're working within a half-ton or three-quarter-ton truck's tow rating, especially once you factor in a motor, gear, and fuel.

The power gap is worth calling out. Rated to 425 hp, the Mariah G270 2011 has a 235-hp advantage over the Mariah FS18 Fish & Ski 2007's 190-hp ceiling — enough to notice on acceleration and at cruising speed, particularly with a full passenger load. Fuel capacity breaks the other way: the Mariah G270 2011 carries 75 gallons versus 22 gallons in the Mariah FS18 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 8 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.

Bottom line: The Mariah G270 2011 at 27,0 ft is the right call if deck space, comfort, and entertaining are top of your list. The Mariah FS18 Fish & Ski 2007 at 18,0 ft wins on trailering ease, likely lower purchase price, and simpler docking — a solid choice for a buyer who wants more boat for less money.
General Boat Info
MakeMariah
MakeMariah
ModelFS18 Fish & Ski
ModelG27
Model Year2007
Model Year2011
Measurements / Dimensions
Beam7 ft. 8 in. (2.3 m)
Beam8 ft. 6 in. (2.6 m)
Beam - Meters2.34
Beam - Meters2.59
Beam - Inches92
Beam - Inches102
Deadrise18℃
Deadrise18°
Weight - Detail2,950 lbs. (1,339 kg)
Weight - DetailDry: 7,500 lbs. (3,402 kg) Max: 8,200 lbs. (3,720 kg)
Weight - kg1338.1
Weight - kg3719.45
Weight - lbs.295
Weight - lbs.82
Length - Meters5.5
Length - Meters8.2
Length - Feet18
Length - Feet27
Length overall - Detail18 ft. 0 in. (5.5 m)
Length overall - Detail27 ft. (8.2 m)
Length overall - Meters5.49
Length overall - Meters8.23
Length overall - Inches216
Length overall - Inches324
Body / Hull
Hull materialFiberglass
Hull materialAluminum
Hull typenot available
Hull typeModified Vee
Engine and Drivetrain
Fuel tank capacity - Detail22 gal. (83 l)
Fuel tank capacity - Detail75 gal. (284 l)
Fuel tank capacity - Liters83.28
Fuel tank capacity - Liters283.91
Fuel tank capacity - Gal22
Fuel tank capacity - Gal75
Fuel typeGas
Fuel typeGas
Drive typeI/O
Drive typenot available
Engine max190 hp (142 kW)
Engine maxnot available
Horsepowernot available
Horsepower425 hp (317 kW)
Operational Info
Maximum capacityPerson: 1,250 lbs. (567 kg) Total: 3,100 lbs. (1,407 kg)
Maximum capacitynot available
Maximum people8
Maximum peoplenot available
Performance
Maximum speednot available
Maximum speed46 mph

Mariah FS18 Fish & Ski 2007 vs Mariah G270 2011 — Common Questions

Which is the larger boat — the Mariah FS18 Fish & Ski 2007 or the Mariah G270 2011?
The Mariah G270 2011 is the longer of the two at 27,0 feet overall. The Mariah FS18 Fish & Ski 2007 comes in at 18,0 feet, making it roughly 9,0 ft shorter — a meaningful difference in deck room and overall on-water presence.
Which is easier to trailer — the Mariah FS18 Fish & Ski 2007 or the Mariah G270 2011?
For trailering, the Mariah G270 2011 has the edge at 82 lbs dry weight versus 295 lbs for the Mariah FS18 Fish & Ski 2007. 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 G270 2011 is rated to a maximum of 425 hp, giving it the larger power ceiling. The Mariah FS18 Fish & Ski 2007 tops out at 190 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 FS18 Fish & Ski 2007 is Coast Guard rated for 8 passengers, while the Mariah G270 2011 is certified for 8. 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 Mariah G270 2011 measures 102" wide, compared to 92" for the Mariah FS18 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 FS18 Fish & Ski 2007 or the Mariah G270 2011?
The Mariah G270 2011 has the bigger tank at 75 gallons, versus 22 gallons on the Mariah FS18 Fish & Ski 2007. That 53-gallon difference translates to roughly 159–265 nautical miles of additional range at cruising speed, depending on motor, load, and conditions.
Are the Mariah FS18 Fish & Ski 2007 and Mariah G270 2011 from the same manufacturer?
Yes — both the Mariah FS18 Fish & Ski 2007 and the Mariah G270 2011 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.