Larson Cabrio 310 2011 vs Larson SEi 180 Fish Series I/O 2005 - Boat Spec Comparison

Q: Which is easier to trailer — the Larson Cabrio 310 2011 or the Larson SEi 180 Fish Series I/O 2005?

For trailering, the Larson Cabrio 310 2011 has the edge at 104 lbs dry weight versus 265 lbs for the Larson SEi 180 Fish Series I/O 2005. 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.

Q: What is the maximum horsepower rating for these boats?

The Larson Cabrio 310 2011 has a documented max rating of 320 hp. Engine specifications for the Larson SEi 180 Fish Series I/O 2005 were not available in our database — check the OEM spec sheet or manufacturer's website for confirmation.

Q: How many people can each boat hold?

The Larson Cabrio 310 2011 is Coast Guard rated for 9 passengers, while the Larson SEi 180 Fish Series I/O 2005 is certified for 6. 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.

Q: Which boat is wider, and does it affect trailering?

The Larson Cabrio 310 2011 measures 126" wide, compared to 93" for the Larson SEi 180 Fish Series I/O 2005. 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.

Q: Which boat has the larger fuel tank — the Larson Cabrio 310 2011 or the Larson SEi 180 Fish Series I/O 2005?

The Larson SEi 180 Fish Series I/O 2005 has the bigger tank at 23 gallons, versus 16 gallons on the Larson Cabrio 310 2011. That 7-gallon difference translates to roughly 21–35 nautical miles of additional range at cruising speed, depending on motor, load, and conditions.

Q: Are the Larson Cabrio 310 2011 and Larson SEi 180 Fish Series I/O 2005 from the same manufacturer?

Yes — both the Larson Cabrio 310 2011 and the Larson SEi 180 Fish Series I/O 2005 are built by Larson. 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.

Boat Comparison

Larson Cabrio 310 2011 vs Larson SEi 180 Fish Series I/O 2005

Larson

Larson Cabrio 310 2011

2011

View full specs →

Larson

Larson SEi 180 Fish Series I/O 2005

2005

View full specs →

Detailed Evaluation & Buyer Recommendation

Larson Cabrio 310 2011 vs Larson SEi 180 Fish Series I/O 2005 — Same Brand, Different Boat

The Larson Cabrio 310 2011 vs Larson SEi 180 Fish Series I/O 2005 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.

The Larson Cabrio 310 2011 carries a rated maximum of 320 hp. Engine data for the Larson SEi 180 Fish Series I/O 2005 wasn't available in our records — check the manufacturer's spec sheet before sizing a motor.Fuel capacity breaks the other way: the Larson SEi 180 Fish Series I/O 2005 carries 23 gallons versus 16 gallons in the Larson Cabrio 310 2011. 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 Larson Cabrio 310 2011 is rated for 9 passengers, while the Larson SEi 180 Fish Series I/O 2005 caps at 6. If you're regularly pulling extended family or a group of friends onto the water, the extra seats on the Larson Cabrio 310 2011 could be the deciding factor.

Bottom line: Choose the Larson Cabrio 310 2011 if your priority is putting more people on the water — it handles 9 passengers and at 31,0 ft it has the deck room to back that rating up comfortably. The Larson SEi 180 Fish Series I/O 2005 is the smarter pick if you want a lighter, easier-to-trailer boat rated for 6 that costs less to run day-to-day.

General Boat Info

MakeLarson

ModelCabrio 31

ModelSEi 180 Fish Series I/O

Model Year2011

Model Year2005

Measurements / Dimensions

Beam10 ft. 6 in. (3.2 m)

Beam7 ft. 9 in

Beam - Meters3.2

Beam - Meters2.36

Beam - Inches126

Beam - Inches93

Bridge clearance - Detail9 ft. 4 in. (2.84 m) with arch

Bridge clearance - Detailnot available

Bridge clearance - Meters2.84

Bridge clearance - Metersnot available

Bridge clearance - Inches112

Bridge clearance - Inchesnot available

Deadrise20°

Deadrise21℃

Draft [max] - Detail34 in. (86.4 cm)

Draft [max] - Detail31 in. max

Draft [max] - Meters0.86

Draft [max] - Meters0.79

Draft [max] - Inches34

Draft [max] - Inches31

Weight - Detail10,400 lbs. (4,717 kg)

Weight - Detail2,650 lbs. apx

Weight - kg4717.36

Weight - kg1202.02

Weight - lbs.104

Weight - lbs.265

Length - Feet31

Length - Feetnot available

Length overall - Detail31 ft. (9.44 m) with pulpit

Length overall - Detail17 ft. 6 in

Length overall - Meters9.45

Length overall - Meters5.33

Length overall - Inches372

Length overall - Inches21

Body / Hull

Hull materialFiberglass

Hull typeDeep Vee

Hull typenot available

Engine and Drivetrain

Engine/s standardMerCruiser 5.0L MPI BIII

Engine/s standardnot available

Fuel tank capacity - Detail160 gal. (606 l)

Fuel tank capacity - Detail23 gal

Fuel tank capacity - Liters605.67

Fuel tank capacity - Liters87.06

Fuel tank capacity - Gal16

Fuel tank capacity - Gal23

Fuel typeGas or Diesel

Fuel typenot available

Drive typeI/O

Drive typenot available

Horsepower260 hp

Horsepowernot available

Engine max320 hp

Engine maxnot available

Operational Info

Headroom6 ft. 3 in. (1.91 m) in cabin

Headroomnot available

Water capacity46 gal. (174 l)

Water capacitynot available

Holding tank capacity - Detail37 gal. (140 l)

Holding tank capacity - Detailnot available

Holding tank capacity - Liters140.06

Holding tank capacity - Litersnot available

Holding tank capacity - Gal37

Holding tank capacity - Galnot available

Maximum capacitynot available

Maximum capacity1,100 lbs

Maximum peoplenot available

Maximum people6 Persons

Larson Cabrio 310 2011 vs Larson SEi 180 Fish Series I/O 2005 — Common Questions

Which is easier to trailer — the Larson Cabrio 310 2011 or the Larson SEi 180 Fish Series I/O 2005?

For trailering, the Larson Cabrio 310 2011 has the edge at 104 lbs dry weight versus 265 lbs for the Larson SEi 180 Fish Series I/O 2005. 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 Larson Cabrio 310 2011 has a documented max rating of 320 hp. Engine specifications for the Larson SEi 180 Fish Series I/O 2005 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 Larson Cabrio 310 2011 is Coast Guard rated for 9 passengers, while the Larson SEi 180 Fish Series I/O 2005 is certified for 6. 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 Larson Cabrio 310 2011 measures 126" wide, compared to 93" for the Larson SEi 180 Fish Series I/O 2005. 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 Larson Cabrio 310 2011 or the Larson SEi 180 Fish Series I/O 2005?

The Larson SEi 180 Fish Series I/O 2005 has the bigger tank at 23 gallons, versus 16 gallons on the Larson Cabrio 310 2011. That 7-gallon difference translates to roughly 21–35 nautical miles of additional range at cruising speed, depending on motor, load, and conditions.

Are the Larson Cabrio 310 2011 and Larson SEi 180 Fish Series I/O 2005 from the same manufacturer?

Yes — both the Larson Cabrio 310 2011 and the Larson SEi 180 Fish Series I/O 2005 are built by Larson. 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.

← Larson Cabrio 310 2011 full specs ← Larson SEi 180 Fish Series I/O 2005 full specs