Please select your home edition
Edition
Upffront 2020 Foredeck Club SW LEADERBOARD

Harken Small Boat Furlers - From 14ft Dinghy to 30ft Sportsboat

by Phil Anniss 1 Jan 09:00 UTC
Harken Small Boat Furler equipment © Harken

Harken have a dedicated range of furlers for dinghies and keelboats up to 30ft (3mm, 5mm and 6mm diameter forestays). These are what upffront.com would term "structural furlers", in that they are an integral part of the main forestay. These systems are designed for furling only and cannot be used as a jib reefing system.

The core of the range consists of three standard above deck drum sizes and three under-deck versions.

Furler KitIndividual Part NumberWire Dia.MWLClevis PinWeight (g)
Part No.DrumSwivelH-Swiv(mm)(kg)(mm)DrumSwivelHoistable SwivelTotal
43416316232276.414274216
43516516434316.414274216
48316516446434316.41427482298
477 Under deck477L16446434316.46807482836
43620820746559077.9386261252899
493 Under deck493L20746559077.912012612521714
478 Under deck478L478U4826136111.122964314773204

Above Deck Furler Kits

There are x3 above deck kits for 3mm wire forestays. The 434 low-load kit (drum and swivel) is the smallest of the range and intended for dinghies up to 16ft.

The 435 standard kit (drum and swivel) is almost identical except it has a higher working load of 431kg and can be used on monohulls up to 20ft and catamarans up to 18ft.

An additional 438 kit has the same drum and top swivel as the 435 but includes what Harken calls a Hoistable Swivel (labelled "H-Swiv" in table above). At Upffront.com we would call this a Halyard Swivel as its purpose is to allow the use of a standard jib halyard on a structural furling forestay, so that the jib can be raised/lowered without disconnecting the forestay.

The largest above deck version is the 436 kit which has more than double the working load of the 435 and is designed for a max wire diameter of 5mm and suitable for monohulls from 20-25ft, and multihulls from 18-23ft.

Under Deck Furler Kits

The Harken under deck furlers are all about maximising jib luff length and keeping the jib foot flush with the foredeck. The compromise is an increase in weight (which is a factor of 2.8 and 1.9 for 3mm and 5mm wire diameters respectively). Designed as a more permanent structural installation, all the under deck kits (labelled "UD" in the table above) include Hoistable swivels.

The smallest underdeck kit (477) is for 3mm wire forestays and monohulls up to 20ft. The mid-range underdeck model (493) is designed for boats from 20-25ft (5mm wire) and the largest (478) is for 6mm wire forestays on sports boats from 25-30ft.

On the 478 kit there is an optional upgrade to a high-performance swivel (207HP) which is the same size as the standard 207 top swivel, but has needle thrust bearings to improve performance at high loads. This is designed for use in top end sportsboat fleets.

All these kits are available in individual component parts which provides an extensive range of options for 12-14ft dinghies up to 30ft performance sportsboats.

You can find all these products on Upffront.com here or by searching for the Harken part number (with an "H-" prefix e.g. H-478).

If you have any questions about furling systems or have a project you would like to discuss, please feel free to contact us at or via the furling enquiry form.

Related Articles

Ronstan Cam Cleats
Lighter, stronger and kinder to ropes Simple, reliable and extremely versatile, Cam Cleats are a staple on boats of all sizes, either as the primary rope holding solution on dinghies, or as part of a purchase system on larger boats and yachts. Posted on 15 Jan
Harken Radial versus Performa Winches
Phil Anniss from upffront.com talks about the differences Harken have an extensive range of winches which are split into two primary ranges: Radial and Performa. In this blog we help you understand the key differences between these ranges and guide you to the right choice for you and your boat's needs. Posted on 23 Dec 2020
New product launch - Karver V3 Furlers
A major redesign of the entire KF continuous line furler range Karver have just released details of a major redesign of their entire KF continuous line furler range. Almost 20 years of end user feedback and manufacturing experience have been brought together in this extensive upgrade. Posted on 18 Dec 2020
Improve your Race Starts
Velocitek V2 ProStart is the distillation of more than a decade of experience The new Velocitek V2 ProStart is the distillation of more than a decade of experience and customer feedback building stand-alone, GPS-based, distance-to-line starting aids. It's all about time and distance. Posted on 10 Dec 2020
How Long is my Furling Line?
Guide to estimating when you can't measure It's a simple question but if you are buying a new furler or need to organise a replacement furling line and do not have access to measure it....... how long should it be!? Posted on 3 Dec 2020
Continuous versus Discontinuous Standing Rigging
Looking at the differences, and pros/cons of both types Regardless of material choice (wire, rod or composite), there are two main types of lateral rigging configurations, referred to as Discontinuous or Continuous rigging. Posted on 26 Nov 2020
Celebrating curves with the LOOP Flexi Stick-on
These padeyes can stick to a curved surface, and take a lot of weight You would probably agree that there are very few flat surfaces on a sailing yacht, whereas most hardware bases are flat. Using modern materials and construction methods, the innovative LOOP Flexi Stick-on padeye offers some interesting possibilities. Posted on 19 Nov 2020
Straight Talking
Mast and standing rigging terminology from upffront.com Upffront.com is all about performance sailing hardware and rigging systems. The heart, and driving force, of any sailing yacht is its mast and standing rigging which support the sails. In this article we outline the key terminology. Posted on 12 Nov 2020
Composite Standing Rigging
Material options discussed by upffront.com Having established the significant advantages of reducing rigging weight, next we would like to look at the composite rigging options available on the market. However, before we get to that point, we need to take a little diversion. Posted on 5 Nov 2020
Upffront 2020 Foredeck Club SW FOOTER