South Bay 518CR B 2013 vs South Bay 520FC TT I/O 2010 - Boat Spec Comparison

Q: Which is the larger boat — the South Bay 518CR B 2013 or the South Bay 520FC TT I/O 2010?

The South Bay 520FC TT I/O 2010 is the longer of the two at 21,4 feet overall. The South Bay 518CR B 2013 comes in at 20,6 feet, making it roughly 0,8 ft shorter — a meaningful difference in deck room and overall on-water presence.

Q: Which boat can handle a bigger outboard?

The South Bay 520FC TT I/O 2010 is rated to a maximum of 135 hp, giving it the larger power ceiling. The South Bay 518CR B 2013 tops out at 115 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.

Q: How many people can each boat hold?

The South Bay 518CR B 2013 is Coast Guard rated for 6 passengers, while the South Bay 520FC TT I/O 2010 is certified for 13. 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.

Q: Do these boats require an oversize trailer permit to tow on US highways?

Both the South Bay 518CR B 2013 and South Bay 520FC TT I/O 2010 share an 8 ft. 6 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.

Q: Are the South Bay 518CR B 2013 and South Bay 520FC TT I/O 2010 from the same manufacturer?

Yes — both the South Bay 518CR B 2013 and the South Bay 520FC TT I/O 2010 are built by South Bay. 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.

Boat Comparison

South Bay 518CR B 2013 vs South Bay 520FC TT I/O 2010

South Bay

South Bay 518CR B 2013

2013

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South Bay

South Bay 520FC TT I/O 2010

2010

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Detailed Evaluation & Buyer Recommendation

South Bay 518CR B 2013 vs South Bay 520FC TT I/O 2010 — A Close Look at Two Pontoons

When two boats share the same hull type — in this case both the South Bay 518CR B 2013 and the South Bay 520FC TT I/O 2010 are pontoon designs with aluminum construction — the buying decision usually comes down to a handful of practical questions: how many people are you putting on the water, how far do you trailer, and what does your tow vehicle weigh?

Both boats share a closely matched power ceiling — 115 hp for the South Bay 518CR B 2013 and 135 hp for the South Bay 520FC TT I/O 2010. Real-world performance will come down more to which motor is actually bolted on, its load at the time, and whether it's a 4-stroke or 2-stroke setup.

For family outings this is probably the sharpest distinction between the two. The South Bay 520FC TT I/O 2010 is rated for 13 passengers, while the South Bay 518CR B 2013 caps at 6. If you're regularly pulling extended family or a group of friends onto the water, the extra seats on the South Bay 520FC TT I/O 2010 could be the deciding factor.

Bottom line: Choose the South Bay 520FC TT I/O 2010 if your priority is putting more people on the water — it handles 13 passengers and at 21,4 ft it has the deck room to back that rating up comfortably. The South Bay 518CR B 2013 is the smarter pick if you want a lighter, easier-to-trailer boat rated for 6 that costs less to run day-to-day.

General Boat Info

MakeSouth Bay

Model518CR B

Model520FC TT I/O

Model Year2013

Model Year201

Measurements / Dimensions

Beam8 ft. 6 in

Beam - Meters2.59

Beam - Inches102

Length [deck]19 ft. 11 in

Length [deck]19 ft. 8 in

Length - Feet20.58

Length - Feet21.42

Length overall - Detail20 ft. 7 in

Length overall - Detail21 ft. 5 in

Length overall - Meters6.27

Length overall - Meters6.53

Length overall - Inches247

Length overall - Inches257

Weight - Detailnot available

Weight - Detail2,340 lbs

Weight - kgnot available

Weight - kg1061.41

Weight - lbs.not available

Weight - lbs.234

Body / Hull

Hull materialAluminum

Hull typePontoon

Pontoon and Inflatable Specific

Tube diameter25 in. Tube Length: 19 ft. 4 in

Tube diameter25 in

Number of tubesnot available

Number of tubes2

Engine and Drivetrain

Fuel typeGas

Drive typeOutboard

Drive typeI/O

Engine max115 hp

Engine max135 hp

Fuel tank capacity - Detailnot available

Fuel tank capacity - Detail31 gal

Fuel tank capacity - Litersnot available

Fuel tank capacity - Liters117.35

Fuel tank capacity - Galnot available

Fuel tank capacity - Gal31

Operational Info

Maximum capacitynot available

Maximum capacity2,590 lbs

Maximum peoplenot available

Maximum people13 / 1,895 lbs

South Bay 518CR B 2013 vs South Bay 520FC TT I/O 2010 — Common Questions

Which is the larger boat — the South Bay 518CR B 2013 or the South Bay 520FC TT I/O 2010?

The South Bay 520FC TT I/O 2010 is the longer of the two at 21,4 feet overall. The South Bay 518CR B 2013 comes in at 20,6 feet, making it roughly 0,8 ft shorter — a meaningful difference in deck room and overall on-water presence.

Which boat can handle a bigger outboard?

The South Bay 520FC TT I/O 2010 is rated to a maximum of 135 hp, giving it the larger power ceiling. The South Bay 518CR B 2013 tops out at 115 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 South Bay 518CR B 2013 is Coast Guard rated for 6 passengers, while the South Bay 520FC TT I/O 2010 is certified for 13. 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 South Bay 518CR B 2013 and South Bay 520FC TT I/O 2010 share an 8 ft. 6 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.

Are the South Bay 518CR B 2013 and South Bay 520FC TT I/O 2010 from the same manufacturer?

Yes — both the South Bay 518CR B 2013 and the South Bay 520FC TT I/O 2010 are built by South Bay. 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.

← South Bay 518CR B 2013 full specs ← South Bay 520FC TT I/O 2010 full specs