SeaQuest 660 RIB Sea Trial: Real Speed and Fuel Consumption
The SeaQuest 660 RIB returned to the spotlight as a compact 6.60-metre boat with a racing heritage.
Its hull originally competed for nearly 15 years under Kostas Karantonis, collecting numerous victories.
The larger SeaQuest 760 later evolved from this design.
Both models shared the same hull characteristics, beam and seating arrangements, while the 660 offered a shorter bow section.
The layout included generous storage, a two-person helm seat and a three-person aft bench convertible into a sun deck.
Standard equipment included GPS, an electric windlass and foam decking.
Powered by a Mercury 225 V6, the SeaQuest 660 reached approximately 44 knots.
Cruising speeds of 30–33 knots were recorded with two people aboard.
Fuel consumption remained particularly interesting below 30 knots, where measurements indicated just 0.8–0.9 litres per nautical mile.
SeaQuest 660 RIB: Sea Trial Results
Test conditions: Mercury 225 V6, two people aboard, approximately 150 litres of fuel.
| Engine speed | Speed | Fuel consumption |
|---|---|---|
| 3,500 rpm | 23.5–24 kn | 0.9–1.0 l/NM |
| 4,000 rpm | 27.6 kn | 0.9 l/NM |
| 4,200 rpm | 30–33 kn* | 1.0 l/NM |
| 4,500 rpm | 31.7–32 kn | Not reported |
| Maximum | Approx. 44 kn | Not reported |
*The tester associates 30–33 knots with approximately 4,200 rpm. These figures should be treated as reported observations rather than a fully verified performance curve. Fuel consumption is expressed in litres per nautical mile, not litres per hour.
The Editor’s View
Out friends at the greek Boat & Fishing Magazine are very thorough in their sea trials generating real life data.
Many buyers who are digging deeper often ask that question.
It’s not easy for the dealership to answer that question so here on RIBsONLY.com you will find plenty of answers on that matter.
This video was published on the Greek Boat & Fishing Magazine YouTube channel.
Should you be interested in this brand, I have these videos for you here.
Related reading: What Is a Rigid Inflatable Boat? · How Does a RIB Work? · RIB Fuel Consumption Explained · Are Rigid Inflatable Boats Safe? · What Size RIB Do I Need? · Can a RIB Sink?
Specs
| Model | SEAQUEST 660 |
|---|---|
| Length overall | 6.60 m |
| Beam overall | 2.70 m |
| Bow deadrise | 48° |
| Midship deadrise | 30.5° |
| Transom deadrise | 25° |
| Tube diameter | 0.56 / 0.52 m |
| Tube compartments | 6 |
| Tube material | Hypalon/Neoprene 1,100 dtex |
| Fuel capacity | 300 l |
| Fuel tank material | Stainless steel |
| Freshwater capacity | 100 l |
| Maximum engine power | 250 hp |
| Recommended engine power | 150 hp |
| Engine shaft length | XL |
| Dry weight | 800 kg |
| Maximum persons | 7 |
| Design category | C* |
* discover what this means
Karel, RIB Advocate
Karel Overlaet is owner, founder, and editor-in-chief of RIBsONLY.com, Home of the Rigid Inflatable Boat. A passionate RIB owner himself, he curates the web’s largest collection of RIB news and videos. What started as a passion project has grown into a knowledge hub with lots of news and 50+ in-depth guides for beginners and experts alike. He also created RIBManufacturerList, a unique global directory of all active RIB brands.
