Larson LX 620 SF 2011 vs Larson SEi 180 Fish Series O/B 2005 - Boat Spec Comparison

Q: Which is easier to trailer — the Larson LX 620 SF 2011 or the Larson SEi 180 Fish Series O/B 2005?

For trailering, the Larson LX 620 SF 2011 has the edge at 115 lbs dry weight versus 1 785 lbs for the Larson SEi 180 Fish Series O/B 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: Which boat can handle a bigger outboard?

The Larson SEi 180 Fish Series O/B 2005 is rated to a maximum of 175 hp, giving it the larger power ceiling. The Larson LX 620 SF 2011 tops out at 90 hp. Keep in mind that maximum ratings are just that — matching the motor to the actual load and usage pattern usually matters more than chasing the ceiling.

Q: How many people can each boat hold?

The Larson LX 620 SF 2011 is Coast Guard rated for 6 passengers, while the Larson SEi 180 Fish Series O/B 2005 is certified for 8. 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 O/B 2005 measures 93" wide, compared to 88" for the Larson LX 620 SF 2011. 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 SF 2011 or the Larson SEi 180 Fish Series O/B 2005?

The Larson SEi 180 Fish Series O/B 2005 has the bigger tank at 29 gallons, versus 23 gallons on the Larson LX 620 SF 2011. 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 LX 620 SF 2011 and Larson SEi 180 Fish Series O/B 2005 from the same manufacturer?

Yes — both the Larson LX 620 SF 2011 and the Larson SEi 180 Fish Series O/B 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 SF 2011 vs Larson SEi 180 Fish Series O/B 2005

Larson

Larson LX 620 SF 2011

2011

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Larson

Larson SEi 180 Fish Series O/B 2005

2005

View full specs →

Detailed Evaluation & Buyer Recommendation

Larson LX 620 SF 2011 vs Larson SEi 180 Fish Series O/B 2005 — Same Brand, Different Boat

The Larson LX 620 SF 2011 vs Larson SEi 180 Fish Series O/B 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 power gap is worth calling out. Rated to 175 hp, the Larson SEi 180 Fish Series O/B 2005 has a 85-hp advantage over the Larson LX 620 SF 2011's 90-hp ceiling — enough to notice on acceleration and at cruising speed, particularly with a full passenger load. Fuel capacity breaks the other way: the Larson SEi 180 Fish Series O/B 2005 carries 29 gallons versus 23 gallons in the Larson LX 620 SF 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 SEi 180 Fish Series O/B 2005 is rated for 8 passengers, while the Larson LX 620 SF 2011 caps at 6. If you're regularly pulling extended family or a group of friends onto the water, the extra seats on the Larson SEi 180 Fish Series O/B 2005 could be the deciding factor.

Bottom line: Choose the Larson SEi 180 Fish Series O/B 2005 if your priority is putting more people on the water — it handles 8 passengers and at 0,0 ft it has the deck room to back that rating up comfortably. The Larson LX 620 SF 2011 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

ModelLX 620 SF

ModelSEi 180 Fish Series O/B

Model Year2011

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] - Detail33 in. max

Draft [max] - Meters0.79

Draft [max] - Meters0.84

Draft [max] - Inches31

Draft [max] - Inches33

Weight - Detail1,150 lbs. (522 kg)

Weight - Detail1,785 lbs. apx

Weight - kg521.63

Weight - kg809.66

Weight - lbs.115

Weight - lbs.1785

Length - Feet16.17

Length - Feetnot available

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

Length overall - Detail18 ft. 6 in

Length overall - Meters4.93

Length overall - Meters5.64

Length overall - Inches194

Length overall - Inches222

Height [transom]not available

Height [transom]20 in

Body / Hull

Hull materialFiberglass

Hull typeModified Vee

Hull typenot available

Engine and Drivetrain

Engine/s standardBombardier Pre-Rig

Engine/s standardnot available

Fuel tank capacity - Detail23 gal. (87 l)

Fuel tank capacity - Detail29 gal

Fuel tank capacity - Liters87.06

Fuel tank capacity - Liters109.78

Fuel tank capacity - Gal23

Fuel tank capacity - Gal29

Fuel typeGas

Fuel typenot available

Drive typeOutboard

Drive typenot available

Engine max90 hp

Engine max175 HP

Operational Info

Maximum capacity1,400 lbs. (635 kg)

Maximum capacity1,880 lbs

Maximum people6 or 850 lbs

Maximum people8 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 SF 2011 vs Larson SEi 180 Fish Series O/B 2005 — Common Questions

Which is easier to trailer — the Larson LX 620 SF 2011 or the Larson SEi 180 Fish Series O/B 2005?

For trailering, the Larson LX 620 SF 2011 has the edge at 115 lbs dry weight versus 1 785 lbs for the Larson SEi 180 Fish Series O/B 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.

Which boat can handle a bigger outboard?

The Larson SEi 180 Fish Series O/B 2005 is rated to a maximum of 175 hp, giving it the larger power ceiling. The Larson LX 620 SF 2011 tops out at 90 hp. Keep in mind that maximum ratings are just that — matching the motor to the actual load and usage pattern usually matters more than chasing the ceiling.

How many people can each boat hold?

The Larson LX 620 SF 2011 is Coast Guard rated for 6 passengers, while the Larson SEi 180 Fish Series O/B 2005 is certified for 8. 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 O/B 2005 measures 93" wide, compared to 88" for the Larson LX 620 SF 2011. 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 SF 2011 or the Larson SEi 180 Fish Series O/B 2005?

The Larson SEi 180 Fish Series O/B 2005 has the bigger tank at 29 gallons, versus 23 gallons on the Larson LX 620 SF 2011. 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 LX 620 SF 2011 and Larson SEi 180 Fish Series O/B 2005 from the same manufacturer?

Yes — both the Larson LX 620 SF 2011 and the Larson SEi 180 Fish Series O/B 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 SF 2011 full specs ← Larson SEi 180 Fish Series O/B 2005 full specs