Detailed Evaluation & Buyer Recommendation
Crestliner Backwater Series 1870 SC 2009 vs Crestliner Grand Cayman 2485 I/O 2010 — Same Brand, Different Boat
Matching a modified vee Crestliner Backwater Series 1870 SC 2009 against a pontoon Crestliner Grand Cayman 2485 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 2485 I/O 2010 measures 23,5 feet overall (2010), giving it roughly 5,5 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 Grand Cayman 2485 I/O 2010 tips the scales at 3 613 lbs — 2 438 lbs less than the Crestliner Backwater Series 1870 SC 2009 at 1 175 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 90 hp, the Crestliner Backwater Series 1870 SC 2009 has a 87-hp advantage over the Crestliner Grand Cayman 2485 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 2485 I/O 2010 is rated for 12 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 2485 I/O 2010 could be the deciding factor.
Bottom line: Choose the Crestliner Grand Cayman 2485 I/O 2010 if your priority is putting more people on the water — it handles 12 passengers and at 23,5 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 2485 I/O
Model Year2009
Model Year201
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 - Detail3,200 lbs. (1,451 kg) 3,613 lbs. (1,638 kg) with Tritoon
Weight - kg532.97
Weight - kg1638.83
Weight - lbs.1175
Weight - lbs.3613
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 - Metersnot available
Length - Feet18
Length - Feet23.5
Length overall - Detail18 ft. 0 in. (5.5 m)
Length overall - Detail23 ft. 6 in. (7.1 m)
Length overall - Meters5.49
Length overall - Meters7.16
Length overall - Inches216
Length overall - Inches282
Length [at waterline]not available
Length [at waterline]22 ft. (6.7 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
Drive typeOutboard
Drive typeI/O
Engine max90 hp (outboard) 115 hp (jet)
Engine max3.0 - 4.3 l 3.0 - 5.0 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 capacity1,290 lbs. (585 kg)
Maximum capacity2,000 lbs. (907 kg)
Maximum people5
Maximum people12
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