Larson SEi 180 O/B 2004 vs Larson SEi 180 Ski Fish I/O 2006 - Boat Spec Comparison

Q: Which is easier to trailer — the Larson SEi 180 O/B 2004 or the Larson SEi 180 Ski Fish I/O 2006?

For trailering, the Larson SEi 180 O/B 2004 has the edge at 15 lbs dry weight versus 265 lbs for the Larson SEi 180 Ski Fish 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: What is the maximum horsepower rating for these boats?

The Larson SEi 180 O/B 2004 has a documented max rating of 150 hp. Engine specifications for the Larson SEi 180 Ski Fish I/O 2006 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 SEi 180 O/B 2004 is Coast Guard rated for 5 passengers, while the Larson SEi 180 Ski Fish I/O 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 O/B 2004 and Larson SEi 180 Ski Fish I/O 2006 share an 7 ft. 9 in 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 O/B 2004 and Larson SEi 180 Ski Fish I/O 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 O/B 2004 and Larson SEi 180 Ski Fish I/O 2006 from the same manufacturer?

Yes — both the Larson SEi 180 O/B 2004 and the Larson SEi 180 Ski Fish I/O 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 O/B 2004 vs Larson SEi 180 Ski Fish I/O 2006

Larson

Larson SEi 180 O/B 2004

2004

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Larson

Larson SEi 180 Ski Fish I/O 2006

2006

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Detailed Evaluation & Buyer Recommendation

Larson SEi 180 O/B 2004 vs Larson SEi 180 Ski Fish I/O 2006 — Same Brand, Different Boat

The Larson SEi 180 O/B 2004 vs Larson SEi 180 Ski Fish I/O 2006 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 SEi 180 O/B 2004 carries a rated maximum of 150 hp. Engine data for the Larson SEi 180 Ski Fish I/O 2006 wasn't available in our records — check the manufacturer's spec sheet before sizing a motor.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 SEi 180 Ski Fish I/O 2006 is rated for 6 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 SEi 180 Ski Fish I/O 2006 could be the deciding factor.

Bottom line: Choose the Larson SEi 180 Ski Fish I/O 2006 if your priority is putting more people on the water — it handles 6 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

ModelSEi 180 O/B

ModelSEi 180 Ski Fish I/O

Model Year2004

Model Year2006

Measurements / Dimensions

Beam7 ft. 9 in

Beam7 ft. 9 in. (2.36 m)

Beam - Meters2.36

Beam - Inches93

Deadrise21℃

Draft [max] - Detail30 in. max

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

Draft [max] - Meters0.76

Draft [max] - Meters0.79

Draft [max] - Inches3

Draft [max] - Inches31

Weight - Detail1,500 lbs. apx

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

Weight - kg680.39

Weight - kg1202.02

Weight - lbs.15

Weight - lbs.265

Height [transom]20 in

Height [transom]not available

Length overall - Detail17 ft. 6 in

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

Length overall - Meters5.33

Length overall - Inches21

Length - Metersnot available

Length - Meters5.33

Length - Feetnot available

Length - Feet17

Length - Inchesnot available

Length - Inches6

Body / Hull

Hull materialFiberglass

Hull materialnot available

Hull typenot available

Hull typeModified Vee

Engine and Drivetrain

Fuel tank capacity - Detail23 gal

Fuel tank capacity - Detail23 gal. (87 l)

Fuel tank capacity - Liters87.06

Fuel tank capacity - Gal23

Engine max150 HP

Engine maxnot available

Drive typenot available

Drive typeI/O

Operational Info

Maximum capacity1,475 lbs

Maximum capacity1,100 lbs. (499 kg)

Maximum peoplenot available

Maximum people6

Trailer Info

Trailer - Detailnot available

Trailer - DetailSingle-axle EZ Loader

Larson SEi 180 O/B 2004 vs Larson SEi 180 Ski Fish I/O 2006 — Common Questions

Which is easier to trailer — the Larson SEi 180 O/B 2004 or the Larson SEi 180 Ski Fish I/O 2006?

For trailering, the Larson SEi 180 O/B 2004 has the edge at 15 lbs dry weight versus 265 lbs for the Larson SEi 180 Ski Fish 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.

What is the maximum horsepower rating for these boats?

The Larson SEi 180 O/B 2004 has a documented max rating of 150 hp. Engine specifications for the Larson SEi 180 Ski Fish I/O 2006 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 SEi 180 O/B 2004 is Coast Guard rated for 5 passengers, while the Larson SEi 180 Ski Fish I/O 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 O/B 2004 and Larson SEi 180 Ski Fish I/O 2006 share an 7 ft. 9 in 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 O/B 2004 and Larson SEi 180 Ski Fish I/O 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 O/B 2004 and Larson SEi 180 Ski Fish I/O 2006 from the same manufacturer?

Yes — both the Larson SEi 180 O/B 2004 and the Larson SEi 180 Ski Fish I/O 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 O/B 2004 full specs ← Larson SEi 180 Ski Fish I/O 2006 full specs