Larson SEi 180 Sport I/O 2006 vs Larson Senza 186 2009 - Boat Spec Comparison

Q: Which is the larger boat — the Larson SEi 180 Sport I/O 2006 or the Larson Senza 186 2009?

The Larson Senza 186 2009 is the longer of the two at 18,0 feet overall. The Larson SEi 180 Sport I/O 2006 comes in at 17,0 feet, making it roughly 1,0 ft shorter — a meaningful difference in deck room and overall on-water presence.

Q: Which is easier to trailer — the Larson SEi 180 Sport I/O 2006 or the Larson Senza 186 2009?

For trailering, the Larson Senza 186 2009 has the edge at 27 lbs dry weight versus 2 365 lbs for the Larson SEi 180 Sport I/O 2006. 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: How many people can each boat hold?

The Larson SEi 180 Sport I/O 2006 is Coast Guard rated for 5 passengers, while the Larson Senza 186 2009 is certified for 9. 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 Senza 186 2009 measures 94" wide, compared to 93" for the Larson SEi 180 Sport I/O 2006. 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 SEi 180 Sport I/O 2006 or the Larson Senza 186 2009?

The Larson Senza 186 2009 has the bigger tank at 29 gallons, versus 23 gallons on the Larson SEi 180 Sport I/O 2006. That 6-gallon difference translates to roughly 18–30 nautical miles of additional range at cruising speed, depending on motor, load, and conditions.

Q: Are the Larson SEi 180 Sport I/O 2006 and Larson Senza 186 2009 from the same manufacturer?

Yes — both the Larson SEi 180 Sport I/O 2006 and the Larson Senza 186 2009 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 SEi 180 Sport I/O 2006 vs Larson Senza 186 2009

Larson

Larson SEi 180 Sport I/O 2006

2006

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Larson

Larson Senza 186 2009

2009

View full specs →

Detailed Evaluation & Buyer Recommendation

Larson SEi 180 Sport I/O 2006 vs Larson Senza 186 2009 — A Close Look at Two Modified Vees

When two boats share the same hull type — in this case both the Larson SEi 180 Sport I/O 2006 and the Larson Senza 186 2009 are modified vee designs with composite construction — the buying decision usually comes down to a handful of practical questions: how many people are you putting on the water, how far do you trailer, and what does your tow vehicle weigh?

On paper these two are close siblings in the size department — Larson SEi 180 Sport I/O 2006 at 17,0 ft versus Larson Senza 186 2009 at 18,0 ft. Weight tells a clearer story for trailering families: the Larson SEi 180 Sport I/O 2006 tips the scales at 2 365 lbs — 2 338 lbs more than the Larson Senza 186 2009 at 27 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.

For family outings this is probably the sharpest distinction between the two. The Larson Senza 186 2009 is rated for 9 passengers, while the Larson SEi 180 Sport I/O 2006 caps at 5. If you're regularly pulling extended family or a group of friends onto the water, the extra seats on the Larson Senza 186 2009 could be the deciding factor.

Bottom line: Choose the Larson Senza 186 2009 if your priority is putting more people on the water — it handles 9 passengers and at 18,0 ft it has the deck room to back that rating up comfortably. The Larson SEi 180 Sport I/O 2006 is the smarter pick if you want a lighter, easier-to-trailer boat rated for 5 that costs less to run day-to-day.

General Boat Info

MakeLarson

ModelSEi 180 Sport I/O

ModelSenza 186

Model Year2006

Model Year2009

Measurements / Dimensions

Beam7 ft. 9 in. (2.36 m)

Beam7 ft. 10 in. (2.39 m)

Beam - Meters2.36

Beam - Meters2.39

Beam - Inches93

Beam - Inches94

Deadrise21℃

Draft [max] - Detail31 in. (78.7 cm)

Draft [max] - Detail33 in. (83.8 cm)

Draft [max] - Meters0.79

Draft [max] - Meters0.84

Draft [max] - Inches31

Draft [max] - Inches33

Weight - Detail2,365 lbs. (1,072 kg)

Weight - Detail2,700 lbs. (1,225 kg)

Weight - kg1072.75

Weight - kg1224.7

Weight - lbs.2365

Weight - lbs.27

Length - Meters5.33

Length - Meters5.64

Length - Feet17

Length - Feet18

Length - Inches6

Length overall - Detail17 ft. 6 in. (5.33 m)

Length overall - Detail18 ft. 6 in. (5.64 m)

Length overall - Meters5.33

Length overall - Meters5.64

Length overall - Inches21

Length overall - Inches222

Body / Hull

Hull typeModified Vee

Hull materialnot available

Hull materialFiberglass

Engine and Drivetrain

Fuel tank capacity - Detail23 gal. (87 l)

Fuel tank capacity - Detail29 gal. (109.8 l)

Fuel tank capacity - Liters87.06

Fuel tank capacity - Liters109.78

Fuel tank capacity - Gal23

Fuel tank capacity - Gal29

Drive typeI/O

Fuel typenot available

Fuel typeGas

Operational Info

Maximum capacity1,275 lbs. (578 kg)

Maximum capacity1,400 lbs. (635 kg)

Maximum peoplenot available

Maximum people9

Trailer Info

Trailer - DetailSingle-axle EZ Loader

Trailer - Detailnot available

Larson SEi 180 Sport I/O 2006 vs Larson Senza 186 2009 — Common Questions

Which is the larger boat — the Larson SEi 180 Sport I/O 2006 or the Larson Senza 186 2009?

The Larson Senza 186 2009 is the longer of the two at 18,0 feet overall. The Larson SEi 180 Sport I/O 2006 comes in at 17,0 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 Larson SEi 180 Sport I/O 2006 or the Larson Senza 186 2009?

For trailering, the Larson Senza 186 2009 has the edge at 27 lbs dry weight versus 2 365 lbs for the Larson SEi 180 Sport I/O 2006. 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.

How many people can each boat hold?

The Larson SEi 180 Sport I/O 2006 is Coast Guard rated for 5 passengers, while the Larson Senza 186 2009 is certified for 9. 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 Senza 186 2009 measures 94" wide, compared to 93" for the Larson SEi 180 Sport I/O 2006. 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 SEi 180 Sport I/O 2006 or the Larson Senza 186 2009?

The Larson Senza 186 2009 has the bigger tank at 29 gallons, versus 23 gallons on the Larson SEi 180 Sport I/O 2006. 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 Larson SEi 180 Sport I/O 2006 and Larson Senza 186 2009 from the same manufacturer?

Yes — both the Larson SEi 180 Sport I/O 2006 and the Larson Senza 186 2009 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 SEi 180 Sport I/O 2006 full specs ← Larson Senza 186 2009 full specs