Nitro 591 SC 2006 boat specs
Nitro
Nitro 591 SC 2006
2006
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Nitro Z-7 2013 boat specs
Nitro
Nitro Z-7 2013
2013
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Nitro 591 SC 2006 vs Nitro Z-7 2013 — Same Brand, Different Boat

The Nitro 591 SC 2006 vs Nitro Z-7 2013 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.

On paper these two are close siblings in the size department — Nitro 591 SC 2006 at 18,0 ft versus Nitro Z-7 2013 at 18,7 ft. At 155 lbs and 165 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 200 hp, the Nitro 591 SC 2006 has a 50-hp advantage over the Nitro Z-7 2013's 150-hp ceiling — enough to notice on acceleration and at cruising speed, particularly with a full passenger load. Both carry nearly identical fuel loads — 43 gal and 41 gal — so range won't be a tiebreaker here.

Both boats are rated for 4 passengers — a good fit for a family of four or five plus guests. Comfort at capacity is another matter; the longer hull typically means more seat options and better weight distribution.

Bottom line: Performance buyers should lean toward the Nitro 591 SC 2006 and its 200-hp ceiling. If fuel economy and quieter running matter more than top-end speed, the Nitro Z-7 2013 with its 150-hp rating is the more economical daily driver.
General Boat Info
MakeNitro
MakeNitro
Model591 SC
ModelZ-7
Model Year2006
Model Year2013
Measurements / Dimensions
Beam94 in
Beam94 in
Beam - Meters2.39
Beam - Meters2.39
Beam - Inches94
Beam - Inches94
Weight - Detail1,550 lbs
Weight - Detail1,650 lbs
Weight - kg703.07
Weight - kg748.43
Weight - lbs.155
Weight - lbs.165
Height [transom]22 in
Height [transom]22.5 in
Length - Feet18
Length - Feet18.67
Length - Inches7
Length - Inchesnot available
Length overall - Detail18 ft. 7 in
Length overall - Detail18 ft. 8 in
Length overall - Meters5.66
Length overall - Meters5.69
Length overall - Inches223
Length overall - Inches224
Deadrisenot available
Deadrise16°
Depth - Detailnot available
Depth - Detail19 in
Depth - Centimetersnot available
Depth - Centimeters48.26
Depth - Inchesnot available
Depth - Inches19
Draft [max] - Detailnot available
Draft [max] - Detail15 in
Draft [max] - Metersnot available
Draft [max] - Meters0.38
Draft [max] - Inchesnot available
Draft [max] - Inches15
Engine and Drivetrain
Engine/s standardMercury? 135 OptiMax?
Engine/s standardnot available
Fuel tank capacity - Detail43 gal
Fuel tank capacity - Detail41 gal
Fuel tank capacity - Liters162.77
Fuel tank capacity - Liters155.2
Fuel tank capacity - Gal43
Fuel tank capacity - Gal41
Drive typeOutboard
Drive typeOutboard
Engine max200 hp
Engine max150 hp
Engine makenot available
Engine makeMercury®
Engine modelnot available
Engine model150 OptiMax® Pro XS
Fuel typenot available
Fuel typeGas
Operational Info
Maximum capacity1,550 lbs
Maximum capacity1,390 lbs
Maximum people4
Maximum people4 / 600 lbs
Trailer Info
Trailer - DetailNITRO? color-coordinated single axle drive-on
Trailer - DetailNitro? color-coordinated single-axle drive-on
Trailer - Length over allWith Transom Saver: 25 ft. 0 in. Without Transom Saver: 23 ft. 4 in
Trailer - Length over allnot available
Trailer - Weight3,180 lbs
Trailer - WeightPackage: 3,200 lbs
Trailer - Width8 ft.6 in
Trailer - WidthPackage: 8 ft. 6 in
Body / Hull
Hull materialnot available
Hull materialFiberglass
Hull typenot available
Hull typeModified Vee

Nitro 591 SC 2006 vs Nitro Z-7 2013 — Common Questions

Which is the larger boat — the Nitro 591 SC 2006 or the Nitro Z-7 2013?
The Nitro Z-7 2013 is the longer of the two at 18,7 feet overall. The Nitro 591 SC 2006 comes in at 18,0 feet, making it roughly 0,7 ft shorter — a meaningful difference in deck room and overall on-water presence.
Which is easier to trailer — the Nitro 591 SC 2006 or the Nitro Z-7 2013?
For trailering, the Nitro 591 SC 2006 has the edge at 155 lbs dry weight versus 165 lbs for the Nitro Z-7 2013. 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 Nitro 591 SC 2006 is rated to a maximum of 200 hp, giving it the larger power ceiling. The Nitro Z-7 2013 tops out at 150 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 Nitro 591 SC 2006 is Coast Guard rated for 4 passengers, while the Nitro Z-7 2013 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.
Do these boats require an oversize trailer permit to tow on US highways?
Both the Nitro 591 SC 2006 and Nitro Z-7 2013 share an 94 in beam — meaning both sit right at the 8’6" threshold that most US states use for standard-width loads. In most states you can tow at that width without a special permit, but regulations vary. Always check the rules for your state and any states you'll be passing through before your first long haul.
How do the fuel tanks compare on the Nitro 591 SC 2006 and Nitro Z-7 2013?
Both boats carry similar fuel loads — 43 gallons and 41 gallons respectively. Range will depend heavily on motor choice, throttle usage, and whether you're on flat lake water or coastal chop.
Are the Nitro 591 SC 2006 and Nitro Z-7 2013 from the same manufacturer?
Yes — both the Nitro 591 SC 2006 and the Nitro Z-7 2013 are built by Nitro. 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.