Crestliner Backwater Series 1655 SC 2009 boat specs
Crestliner
Crestliner Backwater Series 1655 SC 2009
2009
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Crestliner Grand Cayman 2685 I/O 2010 boat specs
Crestliner
Crestliner Grand Cayman 2685 I/O 2010
2010
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Crestliner Backwater Series 1655 SC 2009 vs Crestliner Grand Cayman 2685 I/O 2010 — Same Brand, Different Boat

Matching a modified vee Crestliner Backwater Series 1655 SC 2009 against a pontoon Crestliner Grand Cayman 2685 I/O 2010 means you're likely deciding between two genuinely different on-water experiences. Hull type shapes everything from ride quality and fuel burn to dock handling and resale trajectory.

Size is the most obvious dividing line here. The Crestliner Grand Cayman 2685 I/O 2010 measures 25,5 feet overall (2010), giving it roughly 9,5 additional feet of deck space compared to the Crestliner Backwater Series 1655 SC 2009 at 16,0 feet (2009). Weight tells a clearer story for trailering families: the Crestliner Grand Cayman 2685 I/O 2010 tips the scales at 3 719 lbs — 2 834 lbs less than the Crestliner Backwater Series 1655 SC 2009 at 885 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 60 hp, the Crestliner Backwater Series 1655 SC 2009 has a 57-hp advantage over the Crestliner Grand Cayman 2685 I/O 2010's 3-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 Crestliner Grand Cayman 2685 I/O 2010 is rated for 14 passengers, while the Crestliner Backwater Series 1655 SC 2009 caps at 3. If you're regularly pulling extended family or a group of friends onto the water, the extra seats on the Crestliner Grand Cayman 2685 I/O 2010 could be the deciding factor.

Bottom line: Choose the Crestliner Grand Cayman 2685 I/O 2010 if your priority is putting more people on the water — it handles 14 passengers and at 25,5 ft it has the deck room to back that rating up comfortably. The Crestliner Backwater Series 1655 SC 2009 is the smarter pick if you want a lighter, easier-to-trailer boat rated for 3 that costs less to run day-to-day.
General Boat Info
MakeCrestliner
MakeCrestliner
ModelBackwater Series 1655 SC
ModelGrand Cayman 2685 I/O
Model Year2009
Model Year201
Measurements / Dimensions
Beam76 in. (192 cm)
Beam102 in. (259 cm)
Beam - Meters1.93
Beam - Meters2.59
Beam - Inches76
Beam - Inches102
Deadrise8℃
Deadrisenot available
Weight - Detail885 lbs. (401 kg) hull
Weight - Detail3,400 lbs. (1,542 kg) 3,719 lbs. (1,687 kg) with Tritoon
Weight - kg401.43
Weight - kg1686.91
Weight - lbs.885
Weight - lbs.3719
Width [transom] - Detail55 in. (140 cm)
Width [transom] - Detailnot available
Height - Detail23 in. (58 cm)
Height - Detailnot available
Height - Meters0.58
Height - Metersnot available
Height - Inches23
Height - Inchesnot available
Height [transom]20 in. (51 cm)
Height [transom]not available
Length - Meters5
Length - Metersnot available
Length - Feet16
Length - Feet25.5
Length - Inches2
Length - Inchesnot available
Length overall - Detail16 ft. 2 in. (5.0 m)
Length overall - Detail25 ft. 6 in. (7.8 m)
Length overall - Meters4.93
Length overall - Meters7.77
Length overall - Inches194
Length overall - Inches306
Length [at waterline]not available
Length [at waterline]24 ft. (7.3 m) tube length
Body / Hull
Hull materialAluminum
Hull materialAluminum
Hull thickness0.100 in
Hull thicknessnot available
Hull typeModified Vee
Hull typePontoon
Engine and Drivetrain
Fuel tank capacity - DetailPortable
Fuel tank capacity - Detail35 gal. (132 l) 56 gal. (212 l) with Tritoon
Fuel typeGas
Fuel typeGas
Drive typeOutboard
Drive typeI/O
Engine max60 hp (outboard) 90 hp (jet)
Engine max3.0 - 5.0 l 3.0 - 5.7 l with Tritoon
Fuel tank capacity - Litersnot available
Fuel tank capacity - Liters211.98
Fuel tank capacity - Galnot available
Fuel tank capacity - Gal56
Operational Info
Maximum capacity900 lbs. (408 kg)
Maximum capacity2,000 lbs. (907 kg)
Maximum people3
Maximum people14
Pontoon and Inflatable Specific
Tube diameternot available
Tube diameter27 in. (69 cm)
Tube gaugenot available
Tube gauge0.080 in. tube 0.090 in. nose cone
Number of tubesnot available
Number of tubes2 or 3

Crestliner Backwater Series 1655 SC 2009 vs Crestliner Grand Cayman 2685 I/O 2010 — Common Questions

Which is the larger boat — the Crestliner Backwater Series 1655 SC 2009 or the Crestliner Grand Cayman 2685 I/O 2010?
The Crestliner Grand Cayman 2685 I/O 2010 is the longer of the two at 25,5 feet overall. The Crestliner Backwater Series 1655 SC 2009 comes in at 16,0 feet, making it roughly 9,5 ft shorter — a meaningful difference in deck room and overall on-water presence.
Which is easier to trailer — the Crestliner Backwater Series 1655 SC 2009 or the Crestliner Grand Cayman 2685 I/O 2010?
For trailering, the Crestliner Backwater Series 1655 SC 2009 has the edge at 885 lbs dry weight versus 3 719 lbs for the Crestliner Grand Cayman 2685 I/O 2010. 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 Crestliner Backwater Series 1655 SC 2009 is rated to a maximum of 60 hp, giving it the larger power ceiling. The Crestliner Grand Cayman 2685 I/O 2010 tops out at 3 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 Crestliner Backwater Series 1655 SC 2009 is Coast Guard rated for 3 passengers, while the Crestliner Grand Cayman 2685 I/O 2010 is certified for 14. 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 Crestliner Grand Cayman 2685 I/O 2010 measures 102" wide, compared to 76" for the Crestliner Backwater Series 1655 SC 2009. 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.
Are the Crestliner Backwater Series 1655 SC 2009 and Crestliner Grand Cayman 2685 I/O 2010 from the same manufacturer?
Yes — both the Crestliner Backwater Series 1655 SC 2009 and the Crestliner Grand Cayman 2685 I/O 2010 are built by Crestliner. 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.