Crestliner Grand Cayman 2685 I/O 2009 boat specs
Crestliner
Crestliner Grand Cayman 2685 I/O 2009
2009
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VS
Crestliner SS Series (1657 SS) 2011 boat specs
Crestliner
Crestliner SS Series (1657 SS) 2011
2011
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Crestliner Grand Cayman 2685 I/O 2009 vs Crestliner SS Series (1657 SS) 2011 — Same Brand, Different Boat

Matching a pontoon Crestliner Grand Cayman 2685 I/O 2009 against a modified vee Crestliner SS Series (1657 SS) 2011 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 2009 measures 25,0 feet overall (2009), giving it roughly 9,0 additional feet of deck space compared to the Crestliner SS Series (1657 SS) 2011 at 16,0 feet (2011). At 34 lbs and 9 lbs respectively, both sit in a similar weight class — either should pair comfortably with most mid-size SUVs and half-ton trucks, though always confirm your specific tow rating with the motor added.

The power gap is worth calling out. Rated to 50 hp, the Crestliner SS Series (1657 SS) 2011 has a 47-hp advantage over the Crestliner Grand Cayman 2685 I/O 2009's 3-hp ceiling — enough to notice on acceleration and at cruising speed, particularly with a full passenger load. Fuel capacity breaks the other way: the Crestliner Grand Cayman 2685 I/O 2009 carries 35 gallons versus 12 gallons in the Crestliner SS Series (1657 SS) 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 Crestliner Grand Cayman 2685 I/O 2009 is rated for 14 passengers, while the Crestliner SS Series (1657 SS) 2011 caps at 4. 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 2009 could be the deciding factor.

Bottom line: Choose the Crestliner Grand Cayman 2685 I/O 2009 if your priority is putting more people on the water — it handles 14 passengers and at 25,0 ft it has the deck room to back that rating up comfortably. The Crestliner SS Series (1657 SS) 2011 is the smarter pick if you want a lighter, easier-to-trailer boat rated for 4 that costs less to run day-to-day.
General Boat Info
MakeCrestliner
MakeCrestliner
ModelGrand Cayman 2685 I/O
ModelSS Series (1657 SS)
Model Year2009
Model Year2011
Measurements / Dimensions
Beam102 in. (259 cm)
Beam78 in. (198 cm)
Beam - Meters2.59
Beam - Meters1.98
Beam - Inches102
Beam - Inches78
Weight - Detail3,400 lbs. (1,542 kg) with 5.0 l
Weight - Detail900 lbs. (408 kg)
Weight - kg1542.21
Weight - kg408.23
Weight - lbs.34
Weight - lbs.9
Height [transom]27 in. (69 cm)
Height [transom]20 in. (51 cm)
Length - Meters7.8
Length - Metersnot available
Length - Feet25
Length - Feet16
Length - Inches6
Length - Inchesnot available
Length overall - Detail25 ft. 6 in. (7.8 m)
Length overall - Detail16 ft. (4.9 m)
Length overall - Meters7.77
Length overall - Meters4.88
Length overall - Inches306
Length overall - Inches192
Deadrisenot available
Deadrise4°
Depth - Detailnot available
Depth - DetailSide: 22 in. (56 cm)
Depth - Centimetersnot available
Depth - Centimeters55.88
Depth - Inchesnot available
Depth - Inches22
Body / Hull
Hull materialAluminum
Hull materialAluminum
Hull typePontoon
Hull typeModified Vee
Hull thicknessnot available
Hull thickness0.100 in
Pontoon and Inflatable Specific
Tube diameterN/A
Tube diameternot available
Tube gauge0.080 in
Tube gaugenot available
Engine and Drivetrain
Fuel tank capacity - Detail35 gal. (132 l)
Fuel tank capacity - Detail12 gal. (45 l)
Fuel tank capacity - Liters132.49
Fuel tank capacity - Liters45.42
Fuel tank capacity - Gal35
Fuel tank capacity - Gal12
Fuel typeGas
Fuel typeGas
Drive typeI/O
Drive typeOutboard
Engine max3.0 l - 5.0 l
Engine max50 hp
Operational Info
Maximum capacity2,000 lbs. (907 kg)
Maximum capacity1,101 lbs. (499 kg)
Maximum people14
Maximum people4
Trailer Info
Trailer - Detailnot available
Trailer - DetailBlack Marine Master 1-axle w/ loading guides

Crestliner Grand Cayman 2685 I/O 2009 vs Crestliner SS Series (1657 SS) 2011 — Common Questions

Which is the larger boat — the Crestliner Grand Cayman 2685 I/O 2009 or the Crestliner SS Series (1657 SS) 2011?
The Crestliner Grand Cayman 2685 I/O 2009 is the longer of the two at 25,0 feet overall. The Crestliner SS Series (1657 SS) 2011 comes in at 16,0 feet, making it roughly 9,0 ft shorter — a meaningful difference in deck room and overall on-water presence.
Which is easier to trailer — the Crestliner Grand Cayman 2685 I/O 2009 or the Crestliner SS Series (1657 SS) 2011?
For trailering, the Crestliner SS Series (1657 SS) 2011 has the edge at 9 lbs dry weight versus 34 lbs for the Crestliner Grand Cayman 2685 I/O 2009. 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 SS Series (1657 SS) 2011 is rated to a maximum of 50 hp, giving it the larger power ceiling. The Crestliner Grand Cayman 2685 I/O 2009 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 Grand Cayman 2685 I/O 2009 is Coast Guard rated for 14 passengers, while the Crestliner SS Series (1657 SS) 2011 is certified for 4. 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 2009 measures 102" wide, compared to 78" for the Crestliner SS Series (1657 SS) 2011. 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.
Which boat has the larger fuel tank — the Crestliner Grand Cayman 2685 I/O 2009 or the Crestliner SS Series (1657 SS) 2011?
The Crestliner Grand Cayman 2685 I/O 2009 has the bigger tank at 35 gallons, versus 12 gallons on the Crestliner SS Series (1657 SS) 2011. That 23-gallon difference translates to roughly 69–115 nautical miles of additional range at cruising speed, depending on motor, load, and conditions.
Are the Crestliner Grand Cayman 2685 I/O 2009 and Crestliner SS Series (1657 SS) 2011 from the same manufacturer?
Yes — both the Crestliner Grand Cayman 2685 I/O 2009 and the Crestliner SS Series (1657 SS) 2011 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.