Seaswirl 1851 Dual Console O/B 2007 boat specs
Seaswirl
Seaswirl 1851 Dual Console O/B 2007
2007
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Seaswirl 2101 Center Console O/B 2006 boat specs
Seaswirl
Seaswirl 2101 Center Console O/B 2006
2006
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Seaswirl 1851 Dual Console O/B 2007 vs Seaswirl 2101 Center Console O/B 2006 — Same Brand, Different Boat

The Seaswirl 1851 Dual Console O/B 2007 vs Seaswirl 2101 Center Console O/B 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.

On paper these two are close siblings in the size department — Seaswirl 1851 Dual Console O/B 2007 at 18,0 ft versus Seaswirl 2101 Center Console O/B 2006 at 21,0 ft. At 255 lbs and 315 lbs respectively, both sit in a similar weight class — either should pair comfortably with most mid-size SUVs and half-ton trucks, though always confirm your specific tow rating with the motor added.

The power gap is worth calling out. Rated to 225 hp, the Seaswirl 2101 Center Console O/B 2006 has a 50-hp advantage over the Seaswirl 1851 Dual Console O/B 2007's 175-hp ceiling — enough to notice on acceleration and at cruising speed, particularly with a full passenger load. Fuel capacity breaks the other way: the Seaswirl 2101 Center Console O/B 2006 carries 105 gallons versus 62 gallons in the Seaswirl 1851 Dual Console O/B 2007. 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 Seaswirl 2101 Center Console O/B 2006 is rated for 6 passengers, while the Seaswirl 1851 Dual Console O/B 2007 caps at 5. If you're regularly pulling extended family or a group of friends onto the water, the extra seats on the Seaswirl 2101 Center Console O/B 2006 could be the deciding factor.

Bottom line: Choose the Seaswirl 2101 Center Console O/B 2006 if your priority is putting more people on the water — it handles 6 passengers and at 21,0 ft it has the deck room to back that rating up comfortably. The Seaswirl 1851 Dual Console O/B 2007 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
MakeSeaswirl
MakeSeaswirl
Model1851 Dual Console O/B
Model2101 Center Console O/B
Model Year2007
Model Year2006
Measurements / Dimensions
Beam90 in
Beam102 in. (2.59 m)
Beam - Meters2.29
Beam - Meters2.59
Beam - Inches9
Beam - Inches102
Bridge clearance - Detail51 in
Bridge clearance - Detail70 in. (1.78 m)
Bridge clearance - Meters1.3
Bridge clearance - Meters1.78
Bridge clearance - Inches51
Bridge clearance - Inches7
Deadrise20℃
Deadrise20℃
Draft [drive up] - Detail14 in
Draft [drive up] - Detailnot available
Draft [drive up] meters0.36
Draft [drive up] metersnot available
Draft [drive up] inches14
Draft [drive up] inchesnot available
Draft [max] - Detail30 in
Draft [max] - Detail29 in. (.74 m)
Draft [max] - Meters0.76
Draft [max] - Meters0.74
Draft [max] - Inches3
Draft [max] - Inches29
Weight - Detail2,550 lbs. w/ standard engine
Weight - Detailw/ standard engine: 3,150 lbs. (1,429 kg)
Weight - kg1156.66
Weight - kg1428.81
Weight - lbs.255
Weight - lbs.315
Length - Feet18
Length - Feet21
Length - Inches6
Length - Inches6
Length overall - Detail18 ft. 6 in
Length overall - Detail21 ft. 6 in. (6.55 m)
Length overall - Meters5.64
Length overall - Meters6.55
Length overall - Inches222
Length overall - Inches258
Length - Metersnot available
Length - Meters6.55
Body / Hull
Hull materialFiberglass
Hull materialnot available
Engine and Drivetrain
Engine/s standardYamaha F115 TXR - 4-stroke
Engine/s standardnot available
Fuel tank capacity - Detail62 gal
Fuel tank capacity - Detail105 gal. (397 l)
Fuel tank capacity - Liters234.7
Fuel tank capacity - Liters397.47
Fuel tank capacity - Gal62
Fuel tank capacity - Gal105
Fuel typeGas
Fuel typeGas
Drive typeOutboard
Drive typeOutboard
Engine max175 hp Standard: 115 hp
Engine max225 hp (168 kw) Standard: 150 hp (112 kw)
Operational Info
Maximum capacity1,900 lbs
Maximum capacity1,650 lbs. (748 kg)

Seaswirl 1851 Dual Console O/B 2007 vs Seaswirl 2101 Center Console O/B 2006 — Common Questions

Which is the larger boat — the Seaswirl 1851 Dual Console O/B 2007 or the Seaswirl 2101 Center Console O/B 2006?
The Seaswirl 2101 Center Console O/B 2006 is the longer of the two at 21,0 feet overall. The Seaswirl 1851 Dual Console O/B 2007 comes in at 18,0 feet, making it roughly 3,0 ft shorter — a meaningful difference in deck room and overall on-water presence.
Which is easier to trailer — the Seaswirl 1851 Dual Console O/B 2007 or the Seaswirl 2101 Center Console O/B 2006?
For trailering, the Seaswirl 1851 Dual Console O/B 2007 has the edge at 255 lbs dry weight versus 315 lbs for the Seaswirl 2101 Center Console O/B 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.
Which boat can handle a bigger outboard?
The Seaswirl 2101 Center Console O/B 2006 is rated to a maximum of 225 hp, giving it the larger power ceiling. The Seaswirl 1851 Dual Console O/B 2007 tops out at 175 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 Seaswirl 1851 Dual Console O/B 2007 is Coast Guard rated for 5 passengers, while the Seaswirl 2101 Center Console O/B 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.
Which boat is wider, and does it affect trailering?
The Seaswirl 2101 Center Console O/B 2006 measures 102" wide, compared to 9" for the Seaswirl 1851 Dual Console O/B 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.
Which boat has the larger fuel tank — the Seaswirl 1851 Dual Console O/B 2007 or the Seaswirl 2101 Center Console O/B 2006?
The Seaswirl 2101 Center Console O/B 2006 has the bigger tank at 105 gallons, versus 62 gallons on the Seaswirl 1851 Dual Console O/B 2007. That 43-gallon difference translates to roughly 129–215 nautical miles of additional range at cruising speed, depending on motor, load, and conditions.
Are the Seaswirl 1851 Dual Console O/B 2007 and Seaswirl 2101 Center Console O/B 2006 from the same manufacturer?
Yes — both the Seaswirl 1851 Dual Console O/B 2007 and the Seaswirl 2101 Center Console O/B 2006 are built by Seaswirl. 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.