Review of Marex 310 Sun Cruiser

Basic specs.

The Marex 310 Sun Cruiser is a motorboat designed by the maritime architect Marex together with Nikl Design. The Marex 310 Sun Cruiser is built by the Lithuanian yard Marex Boats, UAB.

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Hull

Both the hull and the deck is made of fibreglass. Generally, a hull made of fibreglass requires only a minimum of maintenance during the sailing season. And outside the sailing season, just bottom cleaning and perhaps anti-fouling painting once a year - a few hours of work, that's all.

Interior

The boat is equipped with 2 cabins, 4+2 berths, a galley, 280.0 liter fresh water capacity, toilet facility and 150.0 liter waste water capacity.

Engine

The fuel tank has a capacity of 440.0 liters (116 US gallons, 96 imperial gallons).

The Marex 310 Sun Cruiser has been equipped with different engine alternatives.

Alternative 1:

The boat may be equipped with an inboard Volvo Penta V8 430 HP gasoline engine at 430 hp (320 kW).

Alternative 2:

Marex 310 Sun Cruiser may be equipped with a Volvo Penta D6 440/Dpi diesel engine at 440 hp (327 kW)..

Alternative 3:

The boat may be equipped with an inboard Volvo Penta D6 380/Dpi diesel engine at 380 hp (283 kW).

Alternative 4:

The boat may be equipped with an inboard Volvo Penta D4 320/Dpi diesel engine at 320 hp (238 kW).

Alternative 5:

Marex 310 Sun Cruiser may be equipped with dual inboard MerCruiser 3,0L 270 SD Bravo3 diesel engines at 540 hp (402 kW). Cruise speed is 26.0 knots. Max speed is 35.0 knots.

Sailing characteristics

This section covers widely used rules of thumb to describe the sailing characteristics. Please note that even though the calculations are correct, the interpretation of the results might not be valid for extreme boats.

EU classification

Marex 310 Sun Cruiser holds a CE certification:

The boat is by European Union certified as Class B. OFFSHORE:

Designed for offshore voyages where conditions up to, and including, wind force 8 (Beaufort scale) and significant wave heights up to, and including, 4 m may be experienced.

Immersion rate

The immersion rate is defined as the weight required to sink the boat a certain level. The immersion rate for Marex 310 Sun Cruiser is about 204 kg/cm, alternatively 1142 lbs/inch.
Meaning: if you load 204 kg cargo on the boat then it will sink 1 cm. Alternatively, if you load 1142 lbs cargo on the boat it will sink 1 inch.

Sailing statistics

This section is statistical comparison with similar boats of the same category. The basis of the following statistical computations is our unique database with more than 26,000 different boat types and 350,000 data points.

L/B (Length Beam Ratio)

What is L/B (Length Beam Ratio)?

The l/b ratio for Marex 310 Sun Cruiser is 2.94.

Compared with other similar motor boats it is more spacy than 66% of all other designs. It seems that the designer has chosen a slightly more spacy hull design.

Curiosities

Powerboat?

In Denmark, you are required to have achieved a 'powerboat driving license' in order to sail a powerboat.
In this context a boat is considered a powerboat if:

Danish definition of a powerboat

According to this definition this boat is categorized as a Powerboat.

Maintenance

Bottom Paint

When buying anti-fouling bottom paint, it's nice to know how much to buy. The surface of the wet bottom is about 29m² (312 ft²).
Based on this, your favourite maritime shop can tell you the quantity you need.

Note: If you use a paint roller you will need more paint than if you use a paintbrush.

Boat owner's ideas

This section is reserved boat owner's modifications, improvements, etc. Here you might find (or contribute with) inspiration for your boat.

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Finally

We are always looking for new photos. If you can contribute with photos for Marex 310 Sun Cruiser it would be a great help.

If you have any comments to the review, improvement suggestions, or the like, feel free to contact us. Criticism helps us to improve.

References

[Ref 1]: ISO 8666 Small craft — Principal data.
[Ref 3]: ISO 12215-5 Small craft — Hull construction and scantlings.