Premier Boats 240 Gemini 2005 boat specs
Premier Boats
Premier Boats 240 Gemini 2005
2005
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VS
Premier Boats Castaway 231 2006 boat specs
Premier Boats
Premier Boats Castaway 231 2006
2006
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Premier Boats 240 Gemini 2005 vs Premier Boats Castaway 231 2006 — Same Brand, Different Boat

The Premier Boats 240 Gemini 2005 vs Premier Boats Castaway 231 2006 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 — Premier Boats 240 Gemini 2005 at 23,0 ft versus Premier Boats Castaway 231 2006 at 24,0 ft. Weight tells a clearer story for trailering families: the Premier Boats 240 Gemini 2005 tips the scales at 2 375 lbs — 2 140 lbs more than the Premier Boats Castaway 231 2006 at 235 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 Premier Boats Castaway 231 2006 tops out at 120 hp. Engine specs for the Premier Boats 240 Gemini 2005 aren't listed — confirm with a dealer before selecting an outboard.

Both boats are rated for 12 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: The Premier Boats 240 Gemini 2005 and Premier Boats Castaway 231 2006 are closely matched on the specs that matter most. Test-ride both on the water you actually use, check current dealer pricing, and factor in long-term service access before you sign.
General Boat Info
MakePremier Boats
MakePremier Boats
Model240 Gemini
ModelCastaway 231
Model Year2005
Model Year2006
Measurements / Dimensions
Beam8 ft. 6 in
Beam8 ft. 6 in
Beam - Meters2.59
Beam - Meters2.59
Beam - Inches102
Beam - Inches102
Weight - Detail1,900 lbs. (2 tubes) 2,375 lbs. (3 tubes)
Weight - Detail1,980 lbs. (2 tubes) 2,350 lbs. (3 tubes)
Weight - kg1077.28
Weight - kg1065.94
Weight - lbs.2375
Weight - lbs.235
Length [deck]22 ft. 7 in
Length [deck]22 ft. 0 in
Length - Feet23
Length - Feet24
Length - Inches6
Length - Inches3
Length overall - Detail23 ft. 6 in
Length overall - Detail24 ft. 3 in
Length overall - Meters7.16
Length overall - Meters7.39
Length overall - Inches282
Length overall - Inches291
Pontoon and Inflatable Specific
Tube diameter23 in
Tube diameter25 in
Tube gauge.08
Tube gaugenot available
Engine and Drivetrain
Engine/s standard120 hp (2 tubes) 175 hp (3 25 in. tubes)
Engine/s standardnot available
Drive typeOutboard
Drive typeOutboard
Engine maxnot available
Engine max120 hp (2 tubes) 175 hp (3 tubes)
Operational Info
Maximum capacity2,272 lbs. (2 tubes) 2,347 lbs. (3 tubes)
Maximum capacity2,272 lbs. (2 and 3 tubes)
Maximum people12
Maximum people12

Premier Boats 240 Gemini 2005 vs Premier Boats Castaway 231 2006 — Common Questions

Which is the larger boat — the Premier Boats 240 Gemini 2005 or the Premier Boats Castaway 231 2006?
The Premier Boats Castaway 231 2006 is the longer of the two at 24,0 feet overall. The Premier Boats 240 Gemini 2005 comes in at 23,0 feet, making it roughly 1,0 ft shorter — a meaningful difference in deck room and overall on-water presence.
Which is easier to trailer — the Premier Boats 240 Gemini 2005 or the Premier Boats Castaway 231 2006?
For trailering, the Premier Boats Castaway 231 2006 has the edge at 235 lbs dry weight versus 2 375 lbs for the Premier Boats 240 Gemini 2005. 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.
What is the maximum horsepower rating for these boats?
The Premier Boats Castaway 231 2006 has a documented max rating of 120 hp. Engine specifications for the Premier Boats 240 Gemini 2005 were not available in our database — check the OEM spec sheet or manufacturer's website for confirmation.
How many people can each boat hold?
The Premier Boats 240 Gemini 2005 is Coast Guard rated for 12 passengers, while the Premier Boats Castaway 231 2006 is certified for 12. 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 Premier Boats 240 Gemini 2005 and Premier Boats Castaway 231 2006 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 Premier Boats 240 Gemini 2005 and Premier Boats Castaway 231 2006 from the same manufacturer?
Yes — both the Premier Boats 240 Gemini 2005 and the Premier Boats Castaway 231 2006 are built by Premier Boats. 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.