Larson LX 620 O/B 2012 vs Larson SEi 180 Fish Series I/O 2005 - Boat Spec Comparison

Q: Which is easier to trailer — the Larson LX 620 O/B 2012 or the Larson SEi 180 Fish Series I/O 2005?

For trailering, the Larson LX 620 O/B 2012 has the edge at 115 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 LX 620 O/B 2012 has a documented max rating of 90 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 LX 620 O/B 2012 is Coast Guard rated for 6 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 SEi 180 Fish Series I/O 2005 measures 93" wide, compared to 88" for the Larson LX 620 O/B 2012. 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 LX 620 O/B 2012 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 19 gallons on the Larson LX 620 O/B 2012. That 4-gallon difference translates to roughly 12–20 nautical miles of additional range at cruising speed, depending on motor, load, and conditions.

Q: Are the Larson LX 620 O/B 2012 and Larson SEi 180 Fish Series I/O 2005 from the same manufacturer?

Yes — both the Larson LX 620 O/B 2012 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 LX 620 O/B 2012 vs Larson SEi 180 Fish Series I/O 2005

Larson

Larson LX 620 O/B 2012

2012

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Larson

Larson SEi 180 Fish Series I/O 2005

2005

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Detailed Evaluation & Buyer Recommendation

Larson LX 620 O/B 2012 vs Larson SEi 180 Fish Series I/O 2005 — Same Brand, Different Boat

The Larson LX 620 O/B 2012 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 LX 620 O/B 2012 carries a rated maximum of 90 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 19 gallons in the Larson LX 620 O/B 2012. On a lake day that's negligible, but for coastal cruising or long reservoir runs the extra range matters.

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 LX 620 O/B 2012 and Larson SEi 180 Fish Series I/O 2005 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

ModelLX 620 O/B

ModelSEi 180 Fish Series I/O

Model Year2012

Model Year2005

Measurements / Dimensions

Beam7 ft. 4 in. (2.24 m)

Beam7 ft. 9 in

Beam - Meters2.24

Beam - Meters2.36

Beam - Inches88

Beam - Inches93

Deadrise21°

Deadrise21℃

Draft [max] - Detail31 in. (79 cm)

Draft [max] - Detail31 in. max

Draft [max] - Meters0.79

Draft [max] - Inches31

Weight - Detail1,150 lbs. (522 kg)

Weight - Detail2,650 lbs. apx

Weight - kg521.63

Weight - kg1202.02

Weight - lbs.115

Weight - lbs.265

Length - Feet16.17

Length - Feetnot available

Length overall - Detail16 ft. 2 in. (4.93 m)

Length overall - Detail17 ft. 6 in

Length overall - Meters4.93

Length overall - Meters5.33

Length overall - Inches194

Length overall - Inches21

Body / Hull

Hull materialComposite

Hull materialFiberglass

Hull typeModified Vee

Hull typenot available

Engine and Drivetrain

Engine makeMercury

Engine makenot available

Engine model60ELPT EFI 4S

Engine modelnot available

Fuel tank capacity - Detail19 gal. (72 l)

Fuel tank capacity - Detail23 gal

Fuel tank capacity - Liters71.92

Fuel tank capacity - Liters87.06

Fuel tank capacity - Gal19

Fuel tank capacity - Gal23

Fuel typeGas

Fuel typenot available

Drive typeOutboard

Drive typenot available

Engine max90 hp

Engine maxnot available

Operational Info

Maximum capacity1,400 lbs. (635 kg)

Maximum capacity1,100 lbs

Maximum people6 / 850 lbs

Maximum people6 Persons

Trailer Info

Trailer - DetailLX 2200 with swing tongue

Trailer - Detailnot available

Trailer - Length over all21 ft. 4 in. (6.5 m)

Trailer - Length over allnot available

Larson LX 620 O/B 2012 vs Larson SEi 180 Fish Series I/O 2005 — Common Questions

Which is easier to trailer — the Larson LX 620 O/B 2012 or the Larson SEi 180 Fish Series I/O 2005?

For trailering, the Larson LX 620 O/B 2012 has the edge at 115 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 LX 620 O/B 2012 has a documented max rating of 90 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 LX 620 O/B 2012 is Coast Guard rated for 6 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 SEi 180 Fish Series I/O 2005 measures 93" wide, compared to 88" for the Larson LX 620 O/B 2012. 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 LX 620 O/B 2012 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 19 gallons on the Larson LX 620 O/B 2012. That 4-gallon difference translates to roughly 12–20 nautical miles of additional range at cruising speed, depending on motor, load, and conditions.

Are the Larson LX 620 O/B 2012 and Larson SEi 180 Fish Series I/O 2005 from the same manufacturer?

Yes — both the Larson LX 620 O/B 2012 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 LX 620 O/B 2012 full specs ← Larson SEi 180 Fish Series I/O 2005 full specs