Marathon DN B-14SST 2007 boat specs
Marathon
Marathon DN B-14SST 2007
2007
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VS
Marathon Seneca Utility 12 2008 boat specs
Marathon
Marathon Seneca Utility 12 2008
2008
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Marathon DN B-14SST 2007 vs Marathon Seneca Utility 12 2008 — Same Brand, Different Boat

The Marathon DN B-14SST 2007 vs Marathon Seneca Utility 12 2008 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 — Marathon DN B-14SST 2007 at 14,0 ft versus Marathon Seneca Utility 12 2008 at 11,0 ft. Weight tells a clearer story for trailering families: the Marathon DN B-14SST 2007 tips the scales at 314 lbs — 193 lbs more than the Marathon Seneca Utility 12 2008 at 121 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.

Both boats share a closely matched power ceiling — 25 hp for the Marathon DN B-14SST 2007 and 10 hp for the Marathon Seneca Utility 12 2008. 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.

For family outings this is probably the sharpest distinction between the two. The Marathon DN B-14SST 2007 is rated for 5 passengers, while the Marathon Seneca Utility 12 2008 caps at 3. If you're regularly pulling extended family or a group of friends onto the water, the extra seats on the Marathon DN B-14SST 2007 could be the deciding factor.

At this size, power-to-weight ratio matters more than outright horsepower. The Marathon Seneca Utility 12 2008 comes in at 12 lbs per hp versus 13 lbs per hp for the Marathon DN B-14SST 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.

Bottom line: Choose the Marathon DN B-14SST 2007 if your priority is putting more people on the water — it handles 5 passengers and at 14,0 ft it has the deck room to back that rating up comfortably. The Marathon Seneca Utility 12 2008 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
MakeMarathon
MakeMarathon
ModelDN B-14SST
ModelSeneca Utility 12
Model Year2007
Model Year2008
Measurements / Dimensions
Beam65 in
Beam55 in
Beam - Meters1.65
Beam - Meters1.4
Beam - Inches65
Beam - Inches55
Depth - DetailAmidship: 17 in
Depth - Detail19 in
Depth - Centimeters43.18
Depth - Centimeters48.26
Depth - Inches17
Depth - Inches19
Weight - Detail314 lbs
Weight - Detail121 lbs
Weight - kg142.43
Weight - kg54.88
Weight - lbs.314
Weight - lbs.121
Length - Feet14
Length - Feet11
Length - Inches4
Length - Inches8
Length overall - Detail14 ft. 4 in
Length overall - Detail11 ft. 8 in
Length overall - Meters4.37
Length overall - Meters3.56
Length overall - Inches172
Length overall - Inches14
Height [transom]not available
Height [transom]15 in
Body / Hull
Hull thickness.063 in
Hull thickness0.05 in
Hull materialnot available
Hull materialAluminum
Hull typenot available
Hull typeModified Vee
Engine and Drivetrain
Fuel typeGas
Fuel typeGas
Drive typeOutboard
Drive typeOutboard
Engine max25 hp
Engine max10 hp
Operational Info
Maximum capacity1,020 lbs
Maximum capacity540 lbs
Maximum people5
Maximum people3 / 350 lbs

Marathon DN B-14SST 2007 vs Marathon Seneca Utility 12 2008 — Common Questions

Which is the larger boat — the Marathon DN B-14SST 2007 or the Marathon Seneca Utility 12 2008?
The Marathon DN B-14SST 2007 is the longer of the two at 14,0 feet overall. The Marathon Seneca Utility 12 2008 comes in at 11,0 feet, making it roughly 3,0 ft shorter — a meaningful difference in deck room and overall on-water presence.
Which is easier to trailer — the Marathon DN B-14SST 2007 or the Marathon Seneca Utility 12 2008?
For trailering, the Marathon Seneca Utility 12 2008 has the edge at 121 lbs dry weight versus 314 lbs for the Marathon DN B-14SST 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 Marathon DN B-14SST 2007 is rated to a maximum of 25 hp, giving it the larger power ceiling. The Marathon Seneca Utility 12 2008 tops out at 10 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 Marathon DN B-14SST 2007 is Coast Guard rated for 5 passengers, while the Marathon Seneca Utility 12 2008 is certified for 3. 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 Marathon Seneca Utility 12 2008 has a better power-to-weight ratio at 12 lbs per hp compared to 13 lbs per hp for the Marathon DN B-14SST 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 Marathon DN B-14SST 2007 measures 65" wide, compared to 55" for the Marathon Seneca Utility 12 2008. 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.
Are the Marathon DN B-14SST 2007 and Marathon Seneca Utility 12 2008 from the same manufacturer?
Yes — both the Marathon DN B-14SST 2007 and the Marathon Seneca Utility 12 2008 are built by Marathon. 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.