Marathon Otisco 1236 2008 boat specs
Marathon
Marathon Otisco 1236 2008
2008
View full specs →
VS
Marathon Seneca 12 2007 boat specs
Marathon
Marathon Seneca 12 2007
2007
View full specs →

Marathon Otisco 1236 2008 vs Marathon Seneca 12 2007 — Same Brand, Different Boat

The Marathon Otisco 1236 2008 vs Marathon Seneca 12 2007 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 Otisco 1236 2008 at 12,0 ft versus Marathon Seneca 12 2007 at 11,0 ft. Weight tells a clearer story for trailering families: the Marathon Seneca 12 2007 tips the scales at 121 lbs — 110 lbs less than the Marathon Otisco 1236 2008 at 11 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 Marathon Seneca 12 2007 tops out at 10 hp. Engine specs for the Marathon Otisco 1236 2008 aren't listed — confirm with a dealer before selecting an outboard.

Both boats are rated for 3 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 Marathon Otisco 1236 2008 and Marathon Seneca 12 2007 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
MakeMarathon
MakeMarathon
ModelOtisco 1236
ModelSeneca 12
Model Year2008
Model Year2007
Measurements / Dimensions
Depth - Detail14 in
Depth - DetailAmidship: 19 in
Depth - Centimeters35.56
Depth - Centimeters48.26
Depth - Inches14
Depth - Inches19
Weight - Detail110 lbs
Weight - Detail121 lbs
Weight - kg49.9
Weight - kg54.88
Weight - lbs.11
Weight - lbs.121
Width [transom] - Detail53 in
Width [transom] - Detailnot available
Height [transom]15 in
Height [transom]15 in
Length - Feet12
Length - Feet11
Length overall - Detail12 ft. 0 in
Length overall - Detail11 ft. 8 in
Length overall - Meters3.66
Length overall - Meters3.56
Length overall - Inches144
Length overall - Inches14
Beamnot available
Beam55 in
Beam - Metersnot available
Beam - Meters1.4
Beam - Inchesnot available
Beam - Inches55
Height - Detailnot available
Height - DetailBow: 24 in
Height - Metersnot available
Height - Meters0.61
Height - Inchesnot available
Height - Inches24
Length - Inchesnot available
Length - Inches8
Body / Hull
Hull materialAluminum
Hull materialnot available
Hull thickness0.05 in
Hull thickness.050 in
Hull typeFlat
Hull typenot available
Engine and Drivetrain
Fuel typeGas
Fuel typeGas
Drive typeOutboard
Drive typeOutboard
Engine maxnot available
Engine max10 hp
Operational Info
Maximum capacity506 lbs
Maximum capacity540 lbs
Maximum people3 / 506 lbs
Maximum people3

Marathon Otisco 1236 2008 vs Marathon Seneca 12 2007 — Common Questions

Which is the larger boat — the Marathon Otisco 1236 2008 or the Marathon Seneca 12 2007?
The Marathon Otisco 1236 2008 is the longer of the two at 12,0 feet overall. The Marathon Seneca 12 2007 comes in at 11,0 feet, making it roughly 1,0 ft shorter — a meaningful difference in deck room and overall on-water presence.
Which is easier to trailer — the Marathon Otisco 1236 2008 or the Marathon Seneca 12 2007?
For trailering, the Marathon Otisco 1236 2008 has the edge at 11 lbs dry weight versus 121 lbs for the Marathon Seneca 12 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.
What is the maximum horsepower rating for these boats?
The Marathon Seneca 12 2007 has a documented max rating of 10 hp. Engine specifications for the Marathon Otisco 1236 2008 were not available in our database — check the OEM spec sheet or manufacturer's website for confirmation.
How many people can each boat hold?
The Marathon Otisco 1236 2008 is Coast Guard rated for 3 passengers, while the Marathon Seneca 12 2007 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.
Are the Marathon Otisco 1236 2008 and Marathon Seneca 12 2007 from the same manufacturer?
Yes — both the Marathon Otisco 1236 2008 and the Marathon Seneca 12 2007 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.