Detailed Evaluation & Buyer Recommendation
Sylvan 1700 Avenger SC 2004 vs Sylvan Mirage 818 F-SD 2008 — Same Brand, Different Boat
The Sylvan 1700 Avenger SC 2004 vs Sylvan Mirage 818 F-SD 2008 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.
The power gap is worth calling out. Rated to 135 hp, the Sylvan 1700 Avenger SC 2004 has a 85-hp advantage over the Sylvan Mirage 818 F-SD 2008's 50-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 Sylvan Mirage 818 F-SD 2008 is rated for 9 passengers, while the Sylvan 1700 Avenger SC 2004 caps at 5. If you're regularly pulling extended family or a group of friends onto the water, the extra seats on the Sylvan Mirage 818 F-SD 2008 could be the deciding factor.
Bottom line: Choose the Sylvan Mirage 818 F-SD 2008 if your priority is putting more people on the water — it handles 9 passengers and at 18,0 ft it has the deck room to back that rating up comfortably. The Sylvan 1700 Avenger SC 2004 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
Model1700 Avenger SC
ModelMirage 818 F-SD
Model Year2004
Model Year2008
Measurements / Dimensions
Beam - Meters2.31
Beam - Meters2.44
Beam - Inches91
Beam - Inches96
Depth - Detail23 in
Depth - Detailnot available
Depth - Centimeters58.42
Depth - Centimetersnot available
Depth - Inches23
Depth - Inchesnot available
Weight - Detail1125 lbs
Weight - Detail1,325 lbs
Weight - kg510.29
Weight - kg601.01
Weight - lbs.1125
Weight - lbs.1325
Width [transom] - Detail90 in
Width [transom] - Detailnot available
Height - Detail31 in
Height - Detailnot available
Height - Meters0.79
Height - Metersnot available
Height - Inches31
Height - Inchesnot available
Height [transom]LS
Height [transom]not available
Length overall - Detail17 ft
Length overall - Detail18 ft. 3 in
Length overall - Meters5.18
Length overall - Meters5.56
Length overall - Inches204
Length overall - Inches219
Length - Feetnot available
Length - Feet18
Length - Inchesnot available
Length - Inches3
Body / Hull
Hull thicknessBottom: 0.100 Side: 0.086 Rib: 0.1
Hull thicknessnot available
Hull materialnot available
Hull materialAluminum
Hull typenot available
Hull typePontoon
Engine and Drivetrain
Fuel tank capacity - Detail31 gal
Fuel tank capacity - Detailnot available
Fuel tank capacity - Liters117.35
Fuel tank capacity - Litersnot available
Fuel tank capacity - Gal31
Fuel tank capacity - Galnot available
Engine max135 hp
Engine max50 hp
Max no of enginesnot available
Max no of engines1
Fuel typenot available
Fuel typeGas
Drive typenot available
Drive typeOutboard
Operational Info
Maximum capacity1300 lbs
Maximum capacity1,750 lbs
Maximum people5
Maximum people9
Pontoon and Inflatable Specific
Tube diameternot available
Tube diameter23 in
Tube gaugenot available
Tube gauge0.080 in
Number of tubesnot available
Number of tubes2