Larson Marine San Marino 1990 vs Larson SEi 180 Sport I/O 2006 - Boat Spec Comparison

Q: Which is the larger boat — the Larson Marine San Marino 1990 or the Larson SEi 180 Sport I/O 2006?

The Larson Marine San Marino 1990 is the longer of the two at 25,0 feet overall. The Larson SEi 180 Sport I/O 2006 comes in at 17,0 feet, making it roughly 8,0 ft shorter — a meaningful difference in deck room and overall on-water presence.

Q: What is the maximum horsepower rating for these boats?

The Larson Marine San Marino 1990 has a documented max rating of 260 hp. Engine specifications for the Larson SEi 180 Sport 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 Marine San Marino 1990 is Coast Guard rated for 7 passengers, while the Larson SEi 180 Sport I/O 2006 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: Are the Larson Marine San Marino 1990 and Larson SEi 180 Sport I/O 2006 from the same manufacturer?

Yes — both the Larson Marine San Marino 1990 and the Larson SEi 180 Sport 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 Marine San Marino 1990 vs Larson SEi 180 Sport I/O 2006

Larson

Larson Marine San Marino 1990

1990

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Larson

Larson SEi 180 Sport I/O 2006

2006

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Detailed Evaluation & Buyer Recommendation

Larson Marine San Marino 1990 vs Larson SEi 180 Sport I/O 2006 — Same Brand, Different Boat

The Larson Marine San Marino 1990 vs Larson SEi 180 Sport 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 Marine San Marino 1990 carries a rated maximum of 260 hp. Engine data for the Larson SEi 180 Sport I/O 2006 wasn't available in our records — check the manufacturer's spec sheet before sizing a motor.

For family outings this is probably the sharpest distinction between the two. The Larson Marine San Marino 1990 is rated for 7 passengers, while the Larson SEi 180 Sport I/O 2006 caps at 5. If you're regularly pulling extended family or a group of friends onto the water, the extra seats on the Larson Marine San Marino 1990 could be the deciding factor.

Bottom line: Choose the Larson Marine San Marino 1990 if your priority is putting more people on the water — it handles 7 passengers and at 25,0 ft it has the deck room to back that rating up comfortably. The Larson SEi 180 Sport I/O 2006 is the smarter pick if you want a lighter, easier-to-trailer boat rated for 5 that costs less to run day-to-day.

Measurements / Dimensions

Length overall - Detail25.00 ft

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

Length - Feet25

Length - Feet17

Length overall - Meters7.62

Length overall - Meters5.33

Length overall - Inches300

Length overall - Inches21

Beamnot available

Beam7 ft. 9 in. (2.36 m)

Beam - Metersnot available

Beam - Meters2.36

Beam - Inchesnot available

Beam - Inches93

Deadrisenot available

Deadrise21℃

Draft [max] - Detailnot available

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

Draft [max] - Metersnot available

Draft [max] - Meters0.79

Draft [max] - Inchesnot available

Draft [max] - Inches31

Weight - Detailnot available

Weight - Detail2,365 lbs. (1,072 kg)

Weight - kgnot available

Weight - kg1072.75

Weight - lbs.not available

Weight - lbs.2365

Length - Metersnot available

Length - Meters5.33

Length - Inchesnot available

Length - Inches6

Engine and Drivetrain

Engine makeMercury

Engine makenot available

Horsepower260 hp

Horsepowernot available

Fuel typeGas

Fuel typenot available

Drive typeinboard

Drive typeI/O

Fuel tank capacity - Detailnot available

Fuel tank capacity - Detail23 gal. (87 l)

Fuel tank capacity - Litersnot available

Fuel tank capacity - Liters87.06

Fuel tank capacity - Galnot available

Fuel tank capacity - Gal23

Operational Info

Boat typePower

Boat typenot available

Maximum capacitynot available

Maximum capacity1,275 lbs. (578 kg)

General Boat Info

Makenot available

MakeLarson

Modelnot available

ModelSEi 180 Sport I/O

Model Yearnot available

Model Year2006

Body / Hull

Hull typenot available

Hull typeModified Vee

Trailer Info

Trailer - Detailnot available

Trailer - DetailSingle-axle EZ Loader

Larson Marine San Marino 1990 vs Larson SEi 180 Sport I/O 2006 — Common Questions

Which is the larger boat — the Larson Marine San Marino 1990 or the Larson SEi 180 Sport I/O 2006?

The Larson Marine San Marino 1990 is the longer of the two at 25,0 feet overall. The Larson SEi 180 Sport I/O 2006 comes in at 17,0 feet, making it roughly 8,0 ft shorter — a meaningful difference in deck room and overall on-water presence.

What is the maximum horsepower rating for these boats?

The Larson Marine San Marino 1990 has a documented max rating of 260 hp. Engine specifications for the Larson SEi 180 Sport 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 Marine San Marino 1990 is Coast Guard rated for 7 passengers, while the Larson SEi 180 Sport I/O 2006 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.

Are the Larson Marine San Marino 1990 and Larson SEi 180 Sport I/O 2006 from the same manufacturer?

Yes — both the Larson Marine San Marino 1990 and the Larson SEi 180 Sport 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 Marine San Marino 1990 full specs ← Larson SEi 180 Sport I/O 2006 full specs