Larson 180 Sport I/O 2007 vs Larson SEi 180 O/B 2004 - Boat Spec Comparison

Q: Which is easier to trailer - the Larson 180 Sport I/O 2007 or the Larson SEi 180 O/B 2004?

For trailering, the Larson SEi 180 O/B 2004 has the edge at 1 500 lbs dry weight versus 2 375 lbs for the Larson 180 Sport I/O 2007. 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 180 Sport I/O 2007 is rated to a maximum of 190 hp, giving it the larger power ceiling. The Larson SEi 180 O/B 2004 tops out at 150 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 180 Sport I/O 2007 is Coast Guard rated for 8 passengers, while the Larson SEi 180 O/B 2004 is certified for 5. 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 O/B 2004 measures 93" wide, compared to 88" for the Larson 180 Sport I/O 2007. 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: How do the fuel tanks compare on the Larson 180 Sport I/O 2007 and Larson SEi 180 O/B 2004?

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 180 Sport I/O 2007 and Larson SEi 180 O/B 2004 from the same manufacturer?

Yes - both the Larson 180 Sport I/O 2007 and the Larson SEi 180 O/B 2004 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 180 Sport I/O 2007 vs Larson SEi 180 O/B 2004

Larson

Larson 180 Sport I/O 2007

2007

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Larson

Larson SEi 180 O/B 2004

2004

View full specs →

Detailed Evaluation & Buyer Recommendation

Larson 180 Sport I/O 2007 vs Larson SEi 180 O/B 2004: Same Brand, Different Boat

The Larson 180 Sport I/O 2007 vs Larson SEi 180 O/B 2004 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 190 hp, the Larson 180 Sport I/O 2007 has a 40-hp advantage over the Larson SEi 180 O/B 2004's 150-hp ceiling - enough to notice on acceleration and at cruising speed, particularly with a full passenger load. Both carry nearly identical fuel loads - 23 gal and 23 gal - so range won't be a tiebreaker here.

For family outings this is probably the sharpest distinction between the two. The Larson 180 Sport I/O 2007 is rated for 8 passengers, while the Larson SEi 180 O/B 2004 caps at 5. If you're regularly pulling extended family or a group of friends onto the water, the extra seats on the Larson 180 Sport I/O 2007 could be the deciding factor.

Bottom line: Choose the Larson 180 Sport I/O 2007 if your priority is putting more people on the water - it handles 8 passengers and at 17,0 ft it has the deck room to back that rating up comfortably. The Larson SEi 180 O/B 2004 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

Model180 Sport I/O

ModelSEi 180 O/B

Model Year2007

Model Year2004

Measurements / Dimensions

Beam7 ft. 4 in. (2.24 m)

Beam7 ft. 9 in.

Beam - Meters2.24

Beam - Meters2.36

Beam - Inches88

Beam - Inches93

Deadrise21℃

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

Draft [max] - Detail30 in. max.

Draft [max] - Meters0.79

Draft [max] - Meters0.76

Draft [max] - Inches31

Draft [max] - Inches30

Weight - Detail2,375 lbs. (1,080 kg)

Weight - Detail1,500 lbs. apx.

Weight - kg1077.28

Weight - kg680.39

Weight - lbs.2375

Weight - lbs.1500

Length - Meters5.36

Length - Metersnot available

Length - Feet17

Length - Feetnot available

Length - Inches7

Length - Inchesnot available

Length overall - Detail17 ft. 7 in. (5.36 m)

Length overall - Detail17 ft. 6 in.

Length overall - Meters5.36

Length overall - Meters5.33

Length overall - Inches211

Length overall - Inches210

Height [transom]not available

Height [transom]20 in.

Body / Hull

Hull materialFiberglass

Hull typeModified Vee

Hull typenot available

Engine and Drivetrain

Engine/s standardVolvo Penta 4.3 GL

Engine/s standardnot available

Fuel tank capacity - Detail23 gal. (87 l)

Fuel tank capacity - Detail23 gal.

Fuel tank capacity - Liters87.06

Fuel tank capacity - Gal23

Fuel typeGas

Fuel typenot available

Drive typeInboard/Outboard

Drive typenot available

Engine max190 hp

Engine max150 HP

Operational Info

Maximum capacity1,150 lbs. (522 kg)

Maximum capacity1,475 lbs.

Maximum people8

Maximum peoplenot available

Trailer Info

Trailer - DetailCustom EZ Loader

Trailer - Detailnot available

Larson 180 Sport I/O 2007 vs Larson SEi 180 O/B 2004 - Common Questions

Which is easier to trailer - the Larson 180 Sport I/O 2007 or the Larson SEi 180 O/B 2004?

For trailering, the Larson SEi 180 O/B 2004 has the edge at 1 500 lbs dry weight versus 2 375 lbs for the Larson 180 Sport I/O 2007. 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 180 Sport I/O 2007 is rated to a maximum of 190 hp, giving it the larger power ceiling. The Larson SEi 180 O/B 2004 tops out at 150 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 180 Sport I/O 2007 is Coast Guard rated for 8 passengers, while the Larson SEi 180 O/B 2004 is certified for 5. 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 O/B 2004 measures 93" wide, compared to 88" for the Larson 180 Sport I/O 2007. 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.

How do the fuel tanks compare on the Larson 180 Sport I/O 2007 and Larson SEi 180 O/B 2004?

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 180 Sport I/O 2007 and Larson SEi 180 O/B 2004 from the same manufacturer?

Yes - both the Larson 180 Sport I/O 2007 and the Larson SEi 180 O/B 2004 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 180 Sport I/O 2007 full specs ← Larson SEi 180 O/B 2004 full specs