Klamath 18 ft. Open 2005 boat specs
Klamath
Klamath 18 ft. Open 2005
2005
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VS
Klamath 18 ft. OPW 2008 boat specs
Klamath
Klamath 18 ft. OPW 2008
2008
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Klamath 18 ft. Open 2005 vs Klamath 18 ft. OPW 2008: Same Brand, Different Boat

The Klamath 18 ft. Open 2005 vs Klamath 18 ft. OPW 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.

On paper these two are close siblings in the size department - Klamath 18 ft. Open 2005 at 18,0 ft versus Klamath 18 ft. OPW 2008 at 18,0 ft. Weight tells a clearer story for trailering families: the Klamath 18 ft. OPW 2008 tips the scales at 700 lbs - 200 lbs less than the Klamath 18 ft. Open 2005 at 500 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.

Both boats share a closely matched power ceiling - 75 hp for the Klamath 18 ft. Open 2005 and 75 hp for the Klamath 18 ft. OPW 2008. 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.

Both boats are rated for 8 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.

At this size, power-to-weight ratio matters more than outright horsepower. The Klamath 18 ft. Open 2005 comes in at 7 lbs per hp versus 9 lbs per hp for the Klamath 18 ft. OPW 2008. The lower the ratio the more explosive the acceleration - meaningful on a short RIB where bursts of speed, quick planing, and agility in surf or tight waterways define the experience.

Bottom line: The Klamath 18 ft. Open 2005 and Klamath 18 ft. OPW 2008 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
MakeKlamath
MakeKlamath
Model18 ft. Open
Model18 ft. OPW
Model Year2005
Model Year2008
Measurements / Dimensions
Beam84 in.
Beam84 in.
Beam - Meters2.13
Beam - Meters2.13
Beam - Inches84
Beam - Inches84
Deadrise8°
Deadrise8℃ at transom
Depth - DetailAt Bow: 45 in. At Midship: 31 in. At Transom: 28 in.
Depth - DetailBow: 45.5 in. Midship: 31 in. Transom: 28.5 in.
Depth - Centimeters114.3
Depth - Centimeters116.84
Depth - Inches45
Depth - Inches45.5
Weight - Detail500 lbs.
Weight - Detail700 lbs.
Weight - kg226.8
Weight - kg317.51
Weight - lbs.500
Weight - lbs.700
Width [transom] - Detail56 in.
Width [transom] - Detail56 in.
Height [transom]20 in.
Height [transom]20 in.
Length - Feet18
Length - Feet18
Length - Inches4
Length - Inches4
Length overall - Detail18 ft. 4 in.
Length overall - Detail18 ft. 4 in.
Length overall - Meters5.59
Length overall - Meters5.59
Length overall - Inches220
Length overall - Inches220
Body / Hull
Hull thicknessSides: .063 in. Bottom: .090 in.
Hull thicknessSides: 0.063 in. Bottom: 0.100 in.
Hull typenot available
Hull typeModified Vee
Engine and Drivetrain
Engine max75 hp
Engine max75 hp
Fuel tank capacity - Detailnot available
Fuel tank capacity - Detail18 gal.
Fuel tank capacity - Litersnot available
Fuel tank capacity - Liters68.14
Fuel tank capacity - Galnot available
Fuel tank capacity - Gal18
Drive typenot available
Drive typeOutboard
Operational Info
Maximum capacity1,735 lbs.
Maximum capacity1,735 lbs.
Maximum people8
Maximum people8

Klamath 18 ft. Open 2005 vs Klamath 18 ft. OPW 2008 - Common Questions

Which is the larger boat - the Klamath 18 ft. Open 2005 or the Klamath 18 ft. OPW 2008?
The Klamath 18 ft. OPW 2008 is the longer of the two at 18,0 feet overall. The Klamath 18 ft. Open 2005 comes in at 18,0 feet, making it roughly 0,0 ft shorter - a meaningful difference in deck room and overall on-water presence.
Which is easier to trailer - the Klamath 18 ft. Open 2005 or the Klamath 18 ft. OPW 2008?
For trailering, the Klamath 18 ft. Open 2005 has the edge at 500 lbs dry weight versus 700 lbs for the Klamath 18 ft. OPW 2008. 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.
How many people can each boat hold?
The Klamath 18 ft. Open 2005 is Coast Guard rated for 8 passengers, while the Klamath 18 ft. OPW 2008 is certified for 8. 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.
Which boat has the better power-to-weight ratio?
The Klamath 18 ft. Open 2005 has a better power-to-weight ratio at 7 lbs per hp compared to 9 lbs per hp for the Klamath 18 ft. OPW 2008. A lower number means quicker acceleration and faster time to plane - the number that actually matters most on short, sporty boats like these.
Do these boats require an oversize trailer permit to tow on US highways?
Both the Klamath 18 ft. Open 2005 and Klamath 18 ft. OPW 2008 share an 84 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 Klamath 18 ft. Open 2005 and Klamath 18 ft. OPW 2008 from the same manufacturer?
Yes - both the Klamath 18 ft. Open 2005 and the Klamath 18 ft. OPW 2008 are built by Klamath. 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.