Harris Flotebote Crowne 270 I/O 2005 boat specs
Harris Flotebote
Harris Flotebote Crowne 270 I/O 2005
2005
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VS
Harris Flotebote Grand Mariner 250 SEL 2011 boat specs
Harris Flotebote
Harris Flotebote Grand Mariner 250 SEL 2011
2011
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Harris Flotebote Crowne 270 I/O 2005 vs Harris Flotebote Grand Mariner 250 SEL 2011 — Same Brand, Different Boat

The Harris Flotebote Crowne 270 I/O 2005 vs Harris Flotebote Grand Mariner 250 SEL 2011 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 — Harris Flotebote Crowne 270 I/O 2005 at 27,0 ft versus Harris Flotebote Grand Mariner 250 SEL 2011 at 25,0 ft. Weight tells a clearer story for trailering families: the Harris Flotebote Grand Mariner 250 SEL 2011 tips the scales at 3 537 lbs — 3 498 lbs less than the Harris Flotebote Crowne 270 I/O 2005 at 39 lbs. That difference is meaningful if you're working within a half-ton or three-quarter-ton truck's tow rating, especially once you factor in a motor, gear, and fuel.

The power gap is worth calling out. Rated to 425 hp, the Harris Flotebote Grand Mariner 250 SEL 2011 has a 200-hp advantage over the Harris Flotebote Crowne 270 I/O 2005's 225-hp ceiling — enough to notice on acceleration and at cruising speed, particularly with a full passenger load.

For family outings this is probably the sharpest distinction between the two. The Harris Flotebote Crowne 270 I/O 2005 is rated for 18 passengers, while the Harris Flotebote Grand Mariner 250 SEL 2011 caps at 16. If you're regularly pulling extended family or a group of friends onto the water, the extra seats on the Harris Flotebote Crowne 270 I/O 2005 could be the deciding factor.

Bottom line: Choose the Harris Flotebote Crowne 270 I/O 2005 if your priority is putting more people on the water — it handles 18 passengers and at 27,0 ft it has the deck room to back that rating up comfortably. The Harris Flotebote Grand Mariner 250 SEL 2011 is the smarter pick if you want a lighter, easier-to-trailer boat rated for 16 that costs less to run day-to-day.
General Boat Info
MakeHarris Flotebote
MakeHarris Flotebote
ModelCrowne 270 I/O
ModelGrand Mariner 250 SEL
Model Year2005
Model Year2011
Measurements / Dimensions
Beam8 ft. 6 in
Beam8 ft. 6 in
Beam - Meters2.59
Beam - Meters2.59
Beam - Inches102
Beam - Inches102
Draft [drive up] - Detail14 in
Draft [drive up] - Detail13 in
Draft [drive up] meters0.36
Draft [drive up] meters0.33
Draft [drive up] inches14
Draft [drive up] inches13
Draft [max] - Detail23 in
Draft [max] - Detail30 in
Draft [max] - Meters0.58
Draft [max] - Meters0.76
Draft [max] - Inches23
Draft [max] - Inches3
Weight - Detail3,900 lbs
Weight - Detail3,537 lbs
Weight - kg1769.01
Weight - kg1604.35
Weight - lbs.39
Weight - lbs.3537
Length [deck]27 ft
Length [deck]not available
Length - Feet27
Length - Feet25
Length overall - Detail27 ft. 0 in
Length overall - Detail27 ft. 4 in. Pontoon: 25 ft
Length overall - Meters8.23
Length overall - Meters8.33
Length overall - Inches324
Length overall - Inches328
Bridge clearance - Detailnot available
Bridge clearance - Detail62 in
Bridge clearance - Metersnot available
Bridge clearance - Meters1.57
Bridge clearance - Inchesnot available
Bridge clearance - Inches62
Pontoon and Inflatable Specific
Tube diameter25 in
Tube diameter25 in
Engine and Drivetrain
Drive typeI/O
Drive typeInboard
Engine max225 hp W/Performance-III Package: 225 hp
Engine max425 hp
Fuel tank capacity - Detailnot available
Fuel tank capacity - DetailPerformance III Package: 81 gal
Fuel tank capacity - Litersnot available
Fuel tank capacity - Liters306.62
Fuel tank capacity - Galnot available
Fuel tank capacity - Gal81
Fuel typenot available
Fuel typeGas
Operational Info
Maximum capacity2,520 lbs
Maximum capacityPerformance III Package: 2,323 lbs
Maximum people18
Maximum peoplePerformance III Package: 16
Body / Hull
Hull materialnot available
Hull materialAluminum
Hull typenot available
Hull typePontoon

Harris Flotebote Crowne 270 I/O 2005 vs Harris Flotebote Grand Mariner 250 SEL 2011 — Common Questions

Which is the larger boat — the Harris Flotebote Crowne 270 I/O 2005 or the Harris Flotebote Grand Mariner 250 SEL 2011?
The Harris Flotebote Crowne 270 I/O 2005 is the longer of the two at 27,0 feet overall. The Harris Flotebote Grand Mariner 250 SEL 2011 comes in at 25,0 feet, making it roughly 2,0 ft shorter — a meaningful difference in deck room and overall on-water presence.
Which is easier to trailer — the Harris Flotebote Crowne 270 I/O 2005 or the Harris Flotebote Grand Mariner 250 SEL 2011?
For trailering, the Harris Flotebote Crowne 270 I/O 2005 has the edge at 39 lbs dry weight versus 3 537 lbs for the Harris Flotebote Grand Mariner 250 SEL 2011. 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 Harris Flotebote Grand Mariner 250 SEL 2011 is rated to a maximum of 425 hp, giving it the larger power ceiling. The Harris Flotebote Crowne 270 I/O 2005 tops out at 225 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 Harris Flotebote Crowne 270 I/O 2005 is Coast Guard rated for 18 passengers, while the Harris Flotebote Grand Mariner 250 SEL 2011 is certified for 16. 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 Harris Flotebote Crowne 270 I/O 2005 and Harris Flotebote Grand Mariner 250 SEL 2011 share an 8 ft. 6 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.
Are the Harris Flotebote Crowne 270 I/O 2005 and Harris Flotebote Grand Mariner 250 SEL 2011 from the same manufacturer?
Yes — both the Harris Flotebote Crowne 270 I/O 2005 and the Harris Flotebote Grand Mariner 250 SEL 2011 are built by Harris Flotebote. 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.