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 Sunliner 240 2005 boat specs
Harris Flotebote
Harris Flotebote Sunliner 240 2005
2005
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Harris Flotebote Grand Mariner SEL 250 2010 vs Harris Flotebote Sunliner 240 2005 — Same Brand, Different Boat

The Harris Flotebote Grand Mariner SEL 250 2010 vs Harris Flotebote Sunliner 240 2005 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 Grand Mariner SEL 250 2010 at 25,0 ft versus Harris Flotebote Sunliner 240 2005 at 24,0 ft. Weight tells a clearer story for trailering families: the Harris Flotebote Sunliner 240 2005 tips the scales at 2 261 lbs — 1 806 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 power gap is worth calling out. Rated to 425 hp, the Harris Flotebote Grand Mariner SEL 250 2010 has a 402-hp advantage over the Harris Flotebote Sunliner 240 2005's 23-hp ceiling — enough to notice on acceleration and at cruising speed, particularly with a full passenger load.

Both boats are rated for 15 passengers — a good fit for a family of four or five plus guests. Comfort at capacity is another matter; the longer hull typically means more seat options and better weight distribution.

Bottom line: Performance buyers should lean toward the Harris Flotebote Grand Mariner SEL 250 2010 and its 425-hp ceiling. If fuel economy and quieter running matter more than top-end speed, the Harris Flotebote Sunliner 240 2005 with its 23-hp rating is the more economical daily driver.
General Boat Info
MakeHarris Flotebote
MakeHarris Flotebote
ModelGrand Mariner SEL 25
ModelSunliner 24
Model Year201
Model Year2005
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 - Detailnot available
Bridge clearance - Meters1.57
Bridge clearance - Metersnot available
Bridge clearance - Inches62
Bridge clearance - Inchesnot available
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 - Detail2,261 lbs
Weight - kg2063.84
Weight - kg1025.57
Weight - lbs.455
Weight - lbs.2261
Length - Feet25
Length - Feet24
Length overall - Detail27 ft. 4 in. Pontoon: 25 ft
Length overall - Detail24 ft. 0 in
Length overall - Meters8.33
Length overall - Meters7.32
Length overall - Inches328
Length overall - Inches288
Length [deck]not available
Length [deck]24 ft
Body / Hull
Hull materialAluminum
Hull materialnot available
Hull typePontoon
Hull typenot available
Pontoon and Inflatable Specific
Tube diameter25 in
Tube diameter23 in
Engine and Drivetrain
Engine makeMercruiser
Engine makenot available
Engine model4.3 l MPI B3
Engine modelnot available
Engine/s standard220 hp
Engine/s standardnot available
Fuel tank capacity - Detail31 gal. Performance III Package: 81 gal
Fuel tank capacity - Detailnot available
Fuel tank capacity - Liters306.62
Fuel tank capacity - Litersnot available
Fuel tank capacity - Gal81
Fuel tank capacity - Galnot available
Fuel typeGas
Fuel typenot available
Drive typeInboard
Drive typeOutboard
Engine max425 hp
Engine max23 in. Tubes: 135 hp 25 in. Tubes: 140 hp W/Performance-III Package: 200 hp
Operational Info
Maximum capacityPerformance III Package: 2,182 lbs
Maximum capacitynot available
Maximum peoplePerformance III Package: 15
Maximum people15

Harris Flotebote Grand Mariner SEL 250 2010 vs Harris Flotebote Sunliner 240 2005 — Common Questions

Which is the larger boat — the Harris Flotebote Grand Mariner SEL 250 2010 or the Harris Flotebote Sunliner 240 2005?
The Harris Flotebote Grand Mariner SEL 250 2010 is the longer of the two at 25,0 feet overall. The Harris Flotebote Sunliner 240 2005 comes in at 24,0 feet, making it roughly 1,0 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 Sunliner 240 2005?
For trailering, the Harris Flotebote Grand Mariner SEL 250 2010 has the edge at 455 lbs dry weight versus 2 261 lbs for the Harris Flotebote Sunliner 240 2005. 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 SEL 250 2010 is rated to a maximum of 425 hp, giving it the larger power ceiling. The Harris Flotebote Sunliner 240 2005 tops out at 23 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 Grand Mariner SEL 250 2010 is Coast Guard rated for 15 passengers, while the Harris Flotebote Sunliner 240 2005 is certified for 15. 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 Sunliner 240 2005 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 Grand Mariner SEL 250 2010 and Harris Flotebote Sunliner 240 2005 from the same manufacturer?
Yes — both the Harris Flotebote Grand Mariner SEL 250 2010 and the Harris Flotebote Sunliner 240 2005 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.