Larson SEi 180 Fish Series I/O 2006 vs Larson SEi 180 Fish Series O/B 2006 - Boat Spec Comparison

Q: Which is the larger boat — the Larson SEi 180 Fish Series I/O 2006 or the Larson SEi 180 Fish Series O/B 2006?

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

Q: Which is easier to trailer — the Larson SEi 180 Fish Series I/O 2006 or the Larson SEi 180 Fish Series O/B 2006?

For trailering, the Larson SEi 180 Fish Series O/B 2006 has the edge at 17 lbs dry weight versus 265 lbs for the Larson SEi 180 Fish Series 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 Fish Series I/O 2006 is Coast Guard rated for 6 passengers, while the Larson SEi 180 Fish Series O/B 2006 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: Do these boats require an oversize trailer permit to tow on US highways?

Both the Larson SEi 180 Fish Series I/O 2006 and Larson SEi 180 Fish Series O/B 2006 share an 7 ft. 9 in. (2.36 m) beam — meaning both sit right at the 8’6" threshold that most US states use for standard-width loads. In most states you can tow at that width without a special permit, but regulations vary. Always check the rules for your state and any states you'll be passing through before your first long haul.

Q: How do the fuel tanks compare on the Larson SEi 180 Fish Series I/O 2006 and Larson SEi 180 Fish Series O/B 2006?

Both boats carry similar fuel loads — 23 gallons and 23 gallons respectively. Range will depend heavily on motor choice, throttle usage, and whether you're on flat lake water or coastal chop.

Q: Are the Larson SEi 180 Fish Series I/O 2006 and Larson SEi 180 Fish Series O/B 2006 from the same manufacturer?

Yes — both the Larson SEi 180 Fish Series I/O 2006 and the Larson SEi 180 Fish Series O/B 2006 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 Fish Series I/O 2006 vs Larson SEi 180 Fish Series O/B 2006

Larson

Larson SEi 180 Fish Series I/O 2006

2006

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Larson

Larson SEi 180 Fish Series O/B 2006

2006

View full specs →

Detailed Evaluation & Buyer Recommendation

Larson SEi 180 Fish Series I/O 2006 vs Larson SEi 180 Fish Series O/B 2006 — A Close Look at Two Modified Vees

When two boats share the same hull type — in this case both the Larson SEi 180 Fish Series I/O 2006 and the Larson SEi 180 Fish Series O/B 2006 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 Fish Series I/O 2006 at 17,0 ft versus Larson SEi 180 Fish Series O/B 2006 at 17,0 ft. Weight tells a clearer story for trailering families: the Larson SEi 180 Fish Series I/O 2006 tips the scales at 265 lbs — 248 lbs more than the Larson SEi 180 Fish Series O/B 2006 at 17 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 are rated for 6 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 Larson SEi 180 Fish Series I/O 2006 and Larson SEi 180 Fish Series O/B 2006 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

MakeLarson

ModelSEi 180 Fish Series I/O

ModelSEi 180 Fish Series O/B

Model Year2006

Measurements / Dimensions

Beam7 ft. 9 in. (2.36 m)

Beam - Meters2.36

Beam - Inches93

Deadrise21℃

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

Draft [max] - Detail30 in. (76.2 cm)

Draft [max] - Meters0.79

Draft [max] - Meters0.76

Draft [max] - Inches31

Draft [max] - Inches3

Weight - Detail2,650 lbs. (1,202 kg)

Weight - Detail1,700 lbs. (771 kg)

Weight - kg1202.02

Weight - kg771.11

Weight - lbs.265

Weight - lbs.17

Length - Meters5.33

Length - Feet17

Length - Inches6

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

Length overall - Meters5.33

Length overall - Inches21

Body / Hull

Hull typeModified Vee

Engine and Drivetrain

Fuel tank capacity - Detail23 gal. (87 l)

Fuel tank capacity - Liters87.06

Fuel tank capacity - Gal23

Drive typeI/O

Drive typeOutboard

Operational Info

Maximum capacity1,100 lbs. (499 kg)

Maximum capacity1,700 lbs. (771 kg)

Maximum people6

Trailer Info

Trailer - DetailSingle-axle EZ loader

Larson SEi 180 Fish Series I/O 2006 vs Larson SEi 180 Fish Series O/B 2006 — Common Questions

Which is the larger boat — the Larson SEi 180 Fish Series I/O 2006 or the Larson SEi 180 Fish Series O/B 2006?

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

Which is easier to trailer — the Larson SEi 180 Fish Series I/O 2006 or the Larson SEi 180 Fish Series O/B 2006?

For trailering, the Larson SEi 180 Fish Series O/B 2006 has the edge at 17 lbs dry weight versus 265 lbs for the Larson SEi 180 Fish Series 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 Fish Series I/O 2006 is Coast Guard rated for 6 passengers, while the Larson SEi 180 Fish Series O/B 2006 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.

Do these boats require an oversize trailer permit to tow on US highways?

Both the Larson SEi 180 Fish Series I/O 2006 and Larson SEi 180 Fish Series O/B 2006 share an 7 ft. 9 in. (2.36 m) beam — meaning both sit right at the 8’6" threshold that most US states use for standard-width loads. In most states you can tow at that width without a special permit, but regulations vary. Always check the rules for your state and any states you'll be passing through before your first long haul.

How do the fuel tanks compare on the Larson SEi 180 Fish Series I/O 2006 and Larson SEi 180 Fish Series O/B 2006?

Both boats carry similar fuel loads — 23 gallons and 23 gallons respectively. Range will depend heavily on motor choice, throttle usage, and whether you're on flat lake water or coastal chop.

Are the Larson SEi 180 Fish Series I/O 2006 and Larson SEi 180 Fish Series O/B 2006 from the same manufacturer?

Yes — both the Larson SEi 180 Fish Series I/O 2006 and the Larson SEi 180 Fish Series O/B 2006 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 Fish Series I/O 2006 full specs ← Larson SEi 180 Fish Series O/B 2006 full specs