Detailed Evaluation & Buyer Recommendation
Crestliner Backwater Series 1870 SC 2009 vs Crestliner Grand Cayman 2685 I/O 2008 — Same Brand, Different Boat
Matching a modified vee Crestliner Backwater Series 1870 SC 2009 against a pontoon Crestliner Grand Cayman 2685 I/O 2008 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 2008 measures 25,0 feet overall (2008), giving it roughly 7,0 additional feet of deck space compared to the Crestliner Backwater Series 1870 SC 2009 at 18,0 feet (2009). Weight tells a clearer story for trailering families: the Crestliner Backwater Series 1870 SC 2009 tips the scales at 1 175 lbs — 1 141 lbs more than the Crestliner Grand Cayman 2685 I/O 2008 at 34 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 Crestliner Backwater Series 1870 SC 2009 carries a rated maximum of 90 hp. Engine data for the Crestliner Grand Cayman 2685 I/O 2008 wasn't available in our records — check the manufacturer's spec sheet before sizing a motor.
For family outings this is probably the sharpest distinction between the two. The Crestliner Grand Cayman 2685 I/O 2008 is rated for 14 passengers, while the Crestliner Backwater Series 1870 SC 2009 caps at 5. 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 2008 could be the deciding factor.
Bottom line: Choose the Crestliner Grand Cayman 2685 I/O 2008 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 Backwater Series 1870 SC 2009 is the smarter pick if you want a lighter, easier-to-trailer boat rated for 5 that costs less to run day-to-day.
General Boat Info
MakeCrestliner
MakeCrestliner
ModelBackwater Series 1870 SC
ModelGrand Cayman 2685 I/O
Model Year2009
Model Year2008
Measurements / Dimensions
Beam90.5 in. (230 cm)
Beam102 in. (259 cm)
Beam - Meters2.31
Beam - Meters2.59
Beam - Inches90.5
Beam - Inches102
Deadrise10℃
Deadrisenot available
Weight - Detail1,175 lbs. (533 kg) hull
Weight - Detail3,400 lbs. (1,542 kg) with 5.0 l
Weight - kg532.97
Weight - kg1542.21
Weight - lbs.1175
Weight - lbs.34
Width [transom] - Detail70 in. (178 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 - Meters5.5
Length - Meters7.8
Length - Feet18
Length - Feet25
Length overall - Detail18 ft. 0 in. (5.5 m)
Length overall - Detail25 ft. 6 in. (7.8 m)
Length overall - Meters5.49
Length overall - Meters7.77
Length overall - Inches216
Length overall - Inches306
Length - Inchesnot available
Length - Inches6
Body / Hull
Hull materialAluminum
Hull materialAluminum
Hull thickness0.100 in
Hull thickness0.080 in
Hull typeModified Vee
Hull typePontoon
Engine and Drivetrain
Fuel tank capacity - DetailPortable
Fuel tank capacity - Detail35 gal. (132 l)
Drive typeOutboard
Drive typeI/O
Engine max90 hp (outboard) 115 hp (jet)
Engine maxnot available
Fuel tank capacity - Litersnot available
Fuel tank capacity - Liters132.49
Fuel tank capacity - Galnot available
Fuel tank capacity - Gal35
Operational Info
Maximum capacity1,290 lbs. (585 kg)
Maximum capacity2,000 lbs. (907 kg)
Maximum people5
Maximum people14
Pontoon and Inflatable Specific
Tube diameternot available
Tube diameter27 in. (69 cm)
Number of tubesnot available
Number of tubes2