Harris Flotebote Grand Mariner SEL 250 2010 boat specs
Harris Flotebote
Harris Flotebote Grand Mariner SEL 250 2010
2010
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VS
Harris Flotebote Royal Heritage 270 2011 boat specs
Harris Flotebote
Harris Flotebote Royal Heritage 270 2011
2011
View full specs →

Harris Flotebote Grand Mariner SEL 250 2010 vs Harris Flotebote Royal Heritage 270 2011 — A Close Look at Two Pontoons

When two boats share the same hull type — in this case both the Harris Flotebote Grand Mariner SEL 250 2010 and the Harris Flotebote Royal Heritage 270 2011 are pontoon designs with aluminum construction — the buying decision usually comes down to a handful of practical questions: how many people are you putting on the water, how far do you trailer, and what does your tow vehicle weigh?

On paper these two are close siblings in the size department — Harris Flotebote Grand Mariner SEL 250 2010 at 25,0 ft versus Harris Flotebote Royal Heritage 270 2011 at 27,0 ft. Weight tells a clearer story for trailering families: the Harris Flotebote Royal Heritage 270 2011 tips the scales at 3 705 lbs — 3 250 lbs less than the Harris Flotebote Grand Mariner SEL 250 2010 at 455 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 Harris Flotebote Grand Mariner SEL 250 2010 carries a rated maximum of 425 hp. Engine data for the Harris Flotebote Royal Heritage 270 2011 wasn't available in our records — check the manufacturer's spec sheet before sizing a motor.Fuel capacity breaks the other way: the Harris Flotebote Grand Mariner SEL 250 2010 carries 81 gallons versus 5 gallons in the Harris Flotebote Royal Heritage 270 2011. 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 Harris Flotebote Royal Heritage 270 2011 is rated for 16 passengers, while the Harris Flotebote Grand Mariner SEL 250 2010 caps at 15. If you're regularly pulling extended family or a group of friends onto the water, the extra seats on the Harris Flotebote Royal Heritage 270 2011 could be the deciding factor.

Bottom line: Choose the Harris Flotebote Royal Heritage 270 2011 if your priority is putting more people on the water — it handles 16 passengers and at 27,0 ft it has the deck room to back that rating up comfortably. The Harris Flotebote Grand Mariner SEL 250 2010 is the smarter pick if you want a lighter, easier-to-trailer boat rated for 15 that costs less to run day-to-day.
General Boat Info
MakeHarris Flotebote
MakeHarris Flotebote
ModelGrand Mariner SEL 25
ModelRoyal Heritage 27
Model Year201
Model Year2011
Measurements / Dimensions
Beam8 ft. 6 in
Beam8 ft. 6 in
Beam - Meters2.59
Beam - Meters2.59
Beam - Inches102
Beam - Inches102
Bridge clearance - Detail62 in
Bridge clearance - Detail62 in
Bridge clearance - Meters1.57
Bridge clearance - Meters1.57
Bridge clearance - Inches62
Bridge clearance - Inches62
Draft [drive up] - Detail13 in
Draft [drive up] - Detail13 in
Draft [drive up] meters0.33
Draft [drive up] meters0.33
Draft [drive up] inches13
Draft [drive up] inches13
Draft [max] - Detail30 in
Draft [max] - Detail22 in
Draft [max] - Meters0.76
Draft [max] - Meters0.56
Draft [max] - Inches3
Draft [max] - Inches22
Weight - Detail3,537 lbs. Performance III Package: 4,550 lbs
Weight - Detail3,390 lbs. Performance III Package: 3,705 lbs
Weight - kg2063.84
Weight - kg1680.56
Weight - lbs.455
Weight - lbs.3705
Length - Feet25
Length - Feet27
Length overall - Detail27 ft. 4 in. Pontoon: 25 ft
Length overall - Detail28 ft. 8 in. Pontoon: 27 ft
Length overall - Meters8.33
Length overall - Meters8.74
Length overall - Inches328
Length overall - Inches344
Body / Hull
Hull materialAluminum
Hull materialAluminum
Hull typePontoon
Hull typePontoon
Pontoon and Inflatable Specific
Tube diameter25 in
Tube diameter25 in
Engine and Drivetrain
Engine makeMercruiser
Engine makenot available
Engine model4.3 l MPI B3
Engine modelnot available
Engine/s standard220 hp
Engine/s standard175 hp with 25 in. tubes Performance III Package: 300 hp
Fuel tank capacity - Detail31 gal. Performance III Package: 81 gal
Fuel tank capacity - Detail31 gal. Performance III Package: 50 gal. XTR Package: 45 gal
Fuel tank capacity - Liters306.62
Fuel tank capacity - Liters189.27
Fuel tank capacity - Gal81
Fuel tank capacity - Gal5
Fuel typeGas
Fuel typeGas
Drive typeInboard
Drive typeOutboard
Engine max425 hp
Engine maxnot available
Operational Info
Maximum capacityPerformance III Package: 2,182 lbs
Maximum capacity2,836 lbs. Performance III Package: 3,351 lbs
Maximum peoplePerformance III Package: 15
Maximum people16 Performance III Package: 18

Harris Flotebote Grand Mariner SEL 250 2010 vs Harris Flotebote Royal Heritage 270 2011 — Common Questions

Which is the larger boat — the Harris Flotebote Grand Mariner SEL 250 2010 or the Harris Flotebote Royal Heritage 270 2011?
The Harris Flotebote Royal Heritage 270 2011 is the longer of the two at 27,0 feet overall. The Harris Flotebote Grand Mariner SEL 250 2010 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 Grand Mariner SEL 250 2010 or the Harris Flotebote Royal Heritage 270 2011?
For trailering, the Harris Flotebote Grand Mariner SEL 250 2010 has the edge at 455 lbs dry weight versus 3 705 lbs for the Harris Flotebote Royal Heritage 270 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.
What is the maximum horsepower rating for these boats?
The Harris Flotebote Grand Mariner SEL 250 2010 has a documented max rating of 425 hp. Engine specifications for the Harris Flotebote Royal Heritage 270 2011 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 Harris Flotebote Grand Mariner SEL 250 2010 is Coast Guard rated for 15 passengers, while the Harris Flotebote Royal Heritage 270 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 Grand Mariner SEL 250 2010 and Harris Flotebote Royal Heritage 270 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.
Which boat has the larger fuel tank — the Harris Flotebote Grand Mariner SEL 250 2010 or the Harris Flotebote Royal Heritage 270 2011?
The Harris Flotebote Grand Mariner SEL 250 2010 has the bigger tank at 81 gallons, versus 5 gallons on the Harris Flotebote Royal Heritage 270 2011. That 76-gallon difference translates to roughly 228–380 nautical miles of additional range at cruising speed, depending on motor, load, and conditions.
Are the Harris Flotebote Grand Mariner SEL 250 2010 and Harris Flotebote Royal Heritage 270 2011 from the same manufacturer?
Yes — both the Harris Flotebote Grand Mariner SEL 250 2010 and the Harris Flotebote Royal Heritage 270 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.