Harris Flotebote Crowne 270 O/B 2005 boat specs
Harris Flotebote
Harris Flotebote Crowne 270 O/B 2005
2005
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VS
Harris Flotebote Grand Mariner 250 2012 boat specs
Harris Flotebote
Harris Flotebote Grand Mariner 250 2012
2012
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Harris Flotebote Crowne 270 O/B 2005 vs Harris Flotebote Grand Mariner 250 2012 โ€” Same Brand, Different Boat

The Harris Flotebote Crowne 270 O/B 2005 vs Harris Flotebote Grand Mariner 250 2012 comparison sits squarely in the category of decisions where specs alone won't tell the whole story โ€” intended use, storage, and long-term ownership costs all factor in.

On paper these two are close siblings in the size department โ€” Harris Flotebote Crowne 270 O/B 2005 at 27,0 ft versus Harris Flotebote Grand Mariner 250 2012 at 26,7 ft. Weight tells a clearer story for trailering families: the Harris Flotebote Grand Mariner 250 2012 tips the scales at 3ย 546 lbs โ€” 3ย 251 lbs less than the Harris Flotebote Crowne 270 O/B 2005 at 295 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 180 hp, the Harris Flotebote Crowne 270 O/B 2005 has a 178-hp advantage over the Harris Flotebote Grand Mariner 250 2012's 2-hp ceiling โ€” 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 O/B 2005 is rated for 18 passengers, while the Harris Flotebote Grand Mariner 250 2012 caps at 2. If you're regularly pulling extended family or a group of friends onto the water, the extra seats on the Harris Flotebote Crowne 270 O/B 2005 could be the deciding factor.

Bottom line: Choose the Harris Flotebote Crowne 270 O/B 2005 if your priority is putting more people on the water โ€” 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 2012 is the smarter pick if you want a lighter, easier-to-trailer boat rated for 2 that costs less to run day-to-day.
General Boat Info
MakeHarris Flotebote
MakeHarris Flotebote
ModelCrowne 270 O/B
ModelGrand Mariner 25
Model Year2005
Model Year2012
Measurements / Dimensions
Beam8 ft. 6 in
Beam8 ft. 6 in
Beam - Meters2.59
Beam - Meters2.59
Beam - Inches102
Beam - Inches102
Draft [drive up] - Detail13 in
Draft [drive up] - Detailnot available
Draft [drive up] meters0.33
Draft [drive up] metersnot available
Draft [drive up] inches13
Draft [drive up] inchesnot available
Draft [max] - Detail22 in
Draft [max] - Detailnot available
Draft [max] - Meters0.56
Draft [max] - Metersnot available
Draft [max] - Inches22
Draft [max] - Inchesnot available
Weight - Detail2,950 lbs
Weight - Detail2 Tubes: 3,114 lbs. 3 Tubes: 3,546 lbs
Weight - kg1338.1
Weight - kg1608.44
Weight - lbs.295
Weight - lbs.3546
Length [deck]27 ft
Length [deck]not available
Length - Feet27
Length - Feet26.67
Length overall - Detail27 ft. 0 in
Length overall - Detail26 ft. 8 in. Pontoon Length: 25 ft
Length overall - Meters8.23
Length overall - Meters8.13
Length overall - Inches324
Length overall - Inches32
Pontoon and Inflatable Specific
Tube diameter25 in
Tube diameter25 in
Engine and Drivetrain
Drive typeOutboard
Drive typenot available
Engine max180 hp W/Performance-III Package: 250 hp
Engine maxnot available
Fuel tank capacity - Detailnot available
Fuel tank capacity - Detail2 Tubes: 31 gal. PIII: 50 gal. XTR: 45 gal
Fuel tank capacity - Litersnot available
Fuel tank capacity - Liters189.27
Fuel tank capacity - Galnot available
Fuel tank capacity - Gal5
Fuel typenot available
Fuel typeGas
Horsepowernot available
Horsepower2 Tubes Max: 175 hp 3 Tubes Max: 300 hp
Operational Info
Maximum capacity2,610 lbs
Maximum capacity2 Tubes: 2,771 lbs. PIII Package: 3,092 lbs. XTR Package: 3,092 lbs
Maximum people18
Maximum people2 / PIII PIII 225 hp+ / XTR: 16 / 16
Body / Hull
Hull materialnot available
Hull materialFiberglass
Hull typenot available
Hull typePontoon

Harris Flotebote Crowne 270 O/B 2005 vs Harris Flotebote Grand Mariner 250 2012 โ€” Common Questions

Which is the larger boat โ€” the Harris Flotebote Crowne 270 O/B 2005 or the Harris Flotebote Grand Mariner 250 2012?
The Harris Flotebote Crowne 270 O/B 2005 is the longer of the two at 27,0 feet overall. The Harris Flotebote Grand Mariner 250 2012 comes in at 26,7 feet, making it roughly 0,3 ft shorter โ€” a meaningful difference in deck room and overall on-water presence.
Which is easier to trailer โ€” the Harris Flotebote Crowne 270 O/B 2005 or the Harris Flotebote Grand Mariner 250 2012?
For trailering, the Harris Flotebote Crowne 270 O/B 2005 has the edge at 295 lbs dry weight versus 3ย 546 lbs for the Harris Flotebote Grand Mariner 250 2012. 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 Crowne 270 O/B 2005 is rated to a maximum of 180 hp, giving it the larger power ceiling. The Harris Flotebote Grand Mariner 250 2012 tops out at 2 hp. Keep in mind that maximum ratings are just that โ€” 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 O/B 2005 is Coast Guard rated for 18 passengers, while the Harris Flotebote Grand Mariner 250 2012 is certified for 2. Note that legal capacity and comfortable capacity aren't always the same thing โ€” 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 O/B 2005 and Harris Flotebote Grand Mariner 250 2012 share an 8 ft. 6 in beam โ€” 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 O/B 2005 and Harris Flotebote Grand Mariner 250 2012 from the same manufacturer?
Yes โ€” both the Harris Flotebote Crowne 270 O/B 2005 and the Harris Flotebote Grand Mariner 250 2012 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.