Quinquari Build

Custom RIBs – what is a Quinquari build?

A Quinquari build reflects attention to detail, an understanding of marine operations and an awareness of what the client requires.

Add good training and handover, reliable back up and after sales support and loving care for every boat we build and that’s why Quinquari Marine is second to none.

In the UK there is now a plethora of RHIB manufacturers.  Humber are the original, the best and the only company we will work with.

We undertake as much of the work in house as possible.  The only sections we subcontract are the laser cutting of large aluminium components and the upholstery.

Everything else, from metal fabrication to joinery, quality teak moulding to complex multiplatform electronic systems, we do ourselves.

Our staff are long term employees and we work as a team.  Employees have defined roles but everyone works until the whole job is complete.  We adopt best practice and undertake quality assurance.

We receive visitors, clients and potential clients from all walks of life.  All comment on their appreciation of being able to talk at ease with us, both in person and over the phone.  We find that a straightforward but relaxed approach works best.

We are located miles away from any engineering or support companies.  We are so isolated, in fact, that we cannot even obtain three- phase electric power.  As such, we have had to evolve and make optimum use of our own resources.

The plus side of our location, in a coastal National Park, is the stunning scenery and above all the spectacular waters – the massive tides and big seas are ideal for testing our boats and for our own continual research and development.

Design and Build

We are not in any respect a standard model production manufacturer. Every vessel is built bespoke, to meet the client’s needs as well as current legislation.

We endeavour to understand as much as possible about the client’s application before developing a deck arrangement with bespoke made components to suit.  This is where our daily, practical experience as operators, contractors and mariners is crucial.

We have our own detailed specification Quinquari Humber build.  This has evolved from high demand for commercial applications and has particular specifications to facilitate our high quality fit-outs.

Our leisure vessels also have this Quinquari specification backbone.

We engage an independent marine surveyor to inspect the hull during construction to ensure conformity not only our specification but also to international standards.

We pay particular attention to the vessel’s final use and deck arrangement; for example, we may specify the tank position for the purpose of achieving optimum longitudinal trim or have specific reinforcements incorporated into the design.

Without a doubt, Humber Hulls are built for strength and longevity.  The designs, in particular the chines, are complex constructions which have evolved over a period of 60 years and the building of almost 12,000 vessels.

This results in a very efficient and forgiving vessel.  Other manufacturers have tried to emulate this design but in most cases have come up with much harder or straighter chines.  Our complex design is harder to achieve and produce in the mould but we think it’s worth it.

The tubes are also manufactured by Humber and are known as some of the best on the market.  We pioneered the longitudinal seam tube, the high specification multiple fendering, split bow system and high end Du Pont/Pennel Hypalon fabric to become standard for most vessels.

For specialist applications we can adapt tubes and build in specialist fittings, including metal and even bullet proof fittings through the use of Kevlar etc.

Humber were the first to develop underwater deployable RHIBs.  Their approach to difficult projects is the same as ours – “Sounds interesting – let’s give it a go!”


Quinquari does not operate a strict 9am to 5pm policy and often we work outside regular business hours. If you become a customer, you will find us available 24/7 for emergency support

Fuel Systems

We have our own specific tank specification for each vessel.  We pay particular attention to ease of filling and include special large filling breathers.

Ease of access to key connections etc. is also important to us, and we double jubilee clip every connection.  Hoses and fittings are all top quality, hose interfaces are used between solid pipes to account for vibration, filters are of top quality and in accessible positions.  Even primer bulbs are manufacturers’ originals, not cheap imitations.

The fuel system is a good example of the attention to detail that we employ.

Bilge Pumps

In most cases on larger RHIBs we specify two big, heavy duty electric bilge pumps.  They are not needed when you are on board but many customers leave their boats on the water in big gales and this helps prevent a flooded boat.

Most manufactures fit a single 1000-litre pump.  We fit two 2100-litre pumps, with each being connected to a separate battery system, after which we make a dedicated aluminium plate to enable them to sit slightly above the hull so they don’t collect muck.  We then manufacture a shaped aluminium or stainless pipe fitting to suit the vessel.


Many years of experience have taught us that the two key problems with vessel wiring are the effects of vibration on components, and corrosion.

All of our vessels have various aluminium bars for clipping back and making a formal arrangement for wires.  These bars are bespoke for each vessel.

Where appropriate, wires will be numbered or marked and in all cases ease of access is essential.  We advocate over deck systems, as this means that you can inspect all wiring with ease.  Where wiring does run under deck, this is through dedicated trunking.

We never engage automotive type connectors.  All of our connection points are soldered.  Key critical wires will have additional protection, with fire resistant flexible conduit etc.  Where hard soldered joints have to be made, they will have at least two coverings of heat shrink tubing.

The main distribution point, normally stainless bus bars, is easily accessible so that problems can be identified readily; this also allows the customer to add to the system with ease if necessary.  In most cases the distribution point will be in its own dedicated compartment with a hatch.

Wires are normally copper, but if the client wishes to upgrade to tin they can.

Wire runs, voltage drops etc. are all calculated.

Everything is clipped with cable ties.

Switches are top quality, either Blue Sea or ETA.

In the past we have worked with a major military organisation to develop RHIBs for fully remote control operations.  These are now used for remotely towing targets by an overseas navy.  We have also worked on a system for landing small remote control, reconnaissance planes onto RHIBs.


We were the first company to develop complex systems, and in some cases we were able to point out problems with their own systems to electronics manufacturers.

So whether it’s fly-by-wire engine systems, a simple radar/plotter arrangement or a complex multi-platform/network system, you will find that we have done it before.


We over size batteries and only use a make with which we have good experience.

Most manufacturers use a simple plastic clip system to tie down batteries.  We make our own bespoke aluminium tie down bars with an 8mm stainless harness.

All battery cables are of top quality, clipped to our own bars and protected by additional fire proof conduit.  Attention is paid to correct breathers, ease of access and optimum positioning for vessel trim.

For isolators, we prefer the simple on/off type and in most cases provide a third isolation override.

In some cases, especially in complex or large systems, we will employ a house and mains system, with diode, split charging, facilities etc.


All screws/bolts etc. are stainless and to A2 or A4 standard.  Our purpose made stainless components are to marine quality.

Sealants are top quality marine silicon or Sika bonders.  Glue will be top quality Bostik.

Where we have painted components they are carefully cleaned back and then coats of epoxy primer/undercoat and glass are applied either by hand or spray.

When using wood, if it is an important visual component we use quality teak. We produce quality joiner standard components ranging from turned teak samson post tops to seat rest detailing and bathing platforms.

We never skimp on fittings but this can come at a cost.  On a basic 10m vessel it is easy to spend £1000 on screws, bolts and sealants etc.


We make our own frames in stainless steel or aluminium with marine grade bending quality material.  We have our own £12,000 specialist bender as well as tube notching and finishing equipment.

We weld in TIG or MIG.  Frames are designed to suit the client’s needs and the vessel. For an A frame to perform, attention to detail is essential; taking into account the vibration in a frame is important, as is consideration of its actual function, whilst the effect of the frame on stability and windage must also be considered.


In some cases a standard production GRP console is used.  Humber have a good range but we will fit from any source.  Some modifications can be made, though they are limited as they are GRP.

In most cases we build a cabin or console bespoke specifically to a client’s demands.

All consoles / cabins are made in marine grade aluminium and in all cases fabricated by us.  For some components, we will work with a specialist Dutch marine designer, who will convert the CAD plan into a cutting plan and we will then have the components cut and folded to shape in Holland to later be welded by us.

We are keen on ergonomics, as well as the practicalities of access and maintenance, so even during the fit-out process we may change and adapt the design.

Whatever the approach, the price remains the same.  We are happy to invest time in new ideas.


Quinquari has worked with most manufacturers and we fit inboard and outboard systems.  We have a lot of experience in this field with our own preferences, and we are open about this.

In some instance we can get prices on engines that we know are not available to other manufacturers, but in all cases the client’s access to engine dealership or support will be the critical point to consider first.


Most of our systems are hydraulic – it is very rare for us to fit a cable steering system.

Most companies will quote for a simple single ram system.  Quinquari in most cases will quote for a twin ram (i.e. a ram on each engine).

We use the best system available, from Australian manufacturer Hydrive, but if you would like us to quote for a cheaper system, please ask.

Tie bars and other components of the system are always top quality.

Attention to detail is paid to even the smallest matters – for example, we will slightly over length hydraulic hoses to help absorb vibration, and so that should you damage a hose end you still have hose enough to pull through and repair.


We keep almost everything in stock and are accustomed to delivering items anywhere in the world at short notice.

We do not treat spares and parts as a gravy train.  Typically, our clients will receive at least half of our margin.

For engine renewals we give our customers all of our discount and keep at maximum 10% for handling, etc.

In some cases we can offer part exchange.


Quinquari produces at most 20 vessels a year and our sister company in Oban does the same.

Our pricing is tailored to suit the client’s requirements and our work is based on projects that we want and enjoy, covering costs and hopefully making some profit.

We are fortunate that by being based in the wilds of West Wales our premises and general costs are low.  In addition, since we have other business interests we don’t have to rely on meeting sales targets or achieving precise profit from boat building.

This business model works remarkably well for us and allows boat building to remain our passion.

In the long term, the business has an exceptionally good footing, with the next generation of family members now taking over the helm whilst key managers with long term loyalty remain in position.