boom replacement sailboat

U.S. Spars --->

U.S. Spars is your source for Z-Spars for Masts, Booms, Rigging, and all associated hardware

“ Sailing starts with U.S. Spars”

U.S. Spars is part of Z-Spars Group in France, the World’s Largest Spar Builders. Z-Spars has been supplying the sailing world with quality products since 1973. US Spars supplies quality brands like Hunter, Beneteau, Com-Pac and Performance Cruising. We would be happy to quote your mast, boom, and rigging needs.

US Spars takes pride in excellent customer service for Business or Individual customers. Please take advantage of our online ordering and fast shipping for all of your small part needs using our easy to use boat look-up to find your boat model and view a diagram with part numbers for easy ordering. For quotes on special orders please use our easy to use quote page for a speedy response.

U.S. Spars looks forward to getting you back on the water!

Questions? – send us an email at  [email protected]  or  [email protected]

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BOOMS WITH A STRONG PROFILE

Seldén booms have a wealth of sophisticated features and can be equipped with a variety of reefing systems to suit different boats and the needs of different sailors. The booms can be fitted for traditional slab reefing or Single Line Reef, or be used for furling masts. The boom extrusions are relatively deep in relation to their width, allowing a lighter extrusion with high resistance to vertical bending. This makes them perfect for use with modern, stiff sailcloth and efficient Rodkicker rigid vangs.

WHY YOU NEED A NEW BOOM

The most common upgrade is to a Single Line Boom. Remain in the cockpit and pull one line to reef your sail and you will prevent adventurous maneuvers at the mast. It’s quick, safe, easy to handle and convenient.

It’s full of potentials. A new boom is prepared for Rodkicker, Lazy jack sliders, easy installation of a stack-pack system and boom light that will lighten up your cockpit at night.

MAKE IT HAPPEN – IT’S EASY

To decide what you need, here are a few useful steps:

• Check if your boat is listed here . If it is you will know what size boom we recommend and its part number.
• Find out how stiff your boat is by calculating the Righting Moment (RM) at 30° heel. This is done with our calculator .

Click on technical information below and use the dimensioning table for Masthead rigged boats or Fractional.

• You need to know the RM, the E-measurement and the Y-measurement to make your choice and all those measurements are explained in this area.
• Compare the forward end of the Seldén boom to the dimensions of the boom bracket on your mast. Clevis pin dimensions and width and depth of the forward end.

Or… just ask a Seldén dealer to figure it all out.

• Boom parts and dimensioning
• Conversion kit, installation manual
• Lazy jack systems
• Single line reefing, operation manual

LIGHT BOOMS IN CARBON FIBRE

Seldén supply carbon booms that harmonise with its carbon mast range. Carbon booms offer weight savings of up to 35% compared to aluminium. This means that boom weight on a typical 35 ft boat is reduced from 30 kg to just 20 kg.

A lighter boom makes gybing less dramatic, as the boom has less momentum. This has a positive effect on the whole boat, especially with regard to the service life of the mainsheet attachment.

A lighter boom also reduces the tendency of the boat to roll when sailing downwind and it improves the effect of the Rodkickers’ gas spring. The section modulus of a carbon boom is twice as high as that of an aluminium boom with the same weight per meter. A stiff boom makes for improved trim and thus higher boat speed.

Boats that sail IRC, and which are already fitted with a carbon mast, suffer no further rating penalty by up-grading to a carbon boom.

In order to reduce weight, while still providing sheaves for single line reefing, we have made the inboard end fitting as short as possible. The outboard end, which is integrated into the carbon section, is finished with a carbon cover plate.

The mainsheet block is attached using a Dyneema® strop that passes through an aramid tube in the boom. Stainless steel bushings at either end of the tube prevent wear, while local carbon reinforcement provides the extra strength required. Booms with “German” split mainsheet systems have fastening positions for blocks at the inboard end, and two webbing strops to hold up the mainsheet.

The carbon booms feature hand laid local reinforcement in the vang attachment area.

Carbon booms can be supplied ready for conventional slab or single line reefing. Clutches can be integrated into the inboard end if you do not wish to lead the reef lines to the cockpit.

The standard Seldén outhaul system features a Dyneema® outhaul line for leading back to a winch in the cockpit. As an alternative, an internal cascade system with up to 20:1 purchase can be used and operated by hand from the cockpit or by a crew member hiking on the rail.

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BOOMS FOR DINGHIES

Seldén dinghy booms have been designed to offer the ultimate in stiffness, weight and functionality. From single-line reefing systems to high-purchase internal outhaul systems, Seldén booms can be equipped with a range of sophisticated features that will make your sailing easier, faster and more convenient. Class rules are closely studied to push performance to the limit. For example, the Olympus boom section optimises the 470 class rules to give the lightest and stiffest boom the class rules allow.

All sections are optimised for high resistance against vertical bending and come with an integral sail track and lower in-boom track for mainsheet and kicking strap attachments.

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A Sure Way to Secure the Boom

When the wind really blows, the pleasant chiming of a marina takes on a different character. Above the howling of the wind is the Devils Tattoo, the racket of one hundred poorly-secured halyards hammering against aluminum. Booms creak from side-to-side, and some pound against stays. Workers are distracted and anyone living aboard wishes his neighbors had taken a few small steps to preserve the peace, not to mention their rig.

The damage is largely invisible. Other than telltale marks on the mast and the occasional line chafed on the spreaders, the harm is the slow fatigue-to-rope type and minor wear on goose necks, traveler cars, blocks, masthead pulleys, and dozens of shackles.

Here are some of the more common ways to reduce this wear and tear.

Boom Gallows: Boom gallows are a great solution for offshore boats, but are rare on cruising boats, and don’t suit many coastal craft. The boom crutch, often removable, is the small-boat equivalent

Pendant to Backstay: This limits the movement but does not eliminate it. It also can harm the backstay.

Twin Mainsheets: Creating a perfect triangle, twin mainsheets hold the boom in securely. Its convenient if you have a twin mainsheet system.

Brace Line: Like the twin mainsheet, a triangle is created (see photo). Simply attach a fixed-length line from the boom-end to a fitting near the rail. Then center the traveler and tighten the mainsheet against the topping lift and brace. It can be removed while sailing, or simply clipped up to the boom end.

Securing Halyards

Countless methods work for securing halyards, but there are three principles that must be observed if it is going to stay quiet when the wind is up.

Separation. The halyards must be separated from the mast by at least two feet or the stretch will allow contact in high winds. So long as the load is taken off the head of the sail, the halyard does not need to be detached from the sail to accomplish this-although this is often preferable on the dock. It should not be possible for sail to be lifted by the tension (or wind). The halyard can be led under a reefing hook, under a mast-mounted winch, or the headboard secured with a length of line.

Firm Tension. Only firm tension, at least 50 pounds and preferably light winch tension, can prevent the halyard from oscillating though a very wide arc.

No Bungee Cords. The problem with bungees is that firm tension is impossible to apply because they stretch. They seem fine in 10 knots, but fail utterly in real wind. All lines used to deflect halyards must have low stretch.

Few sailors hang out in marinas when the wind really blows. We do, since theres often gear to be tested in full conditions. Visit your boat during the next blow, see how she moves in the slip, and secure your boom and halyards. Your reward will be reduced wear, more trustworthy rigging and the unspoken gratitude of your neighbors.

Drew Frye is technical editor for Practical Sailor and author of Rigging Modern Anchors (Seaworthy Publications). He also blogs at his website www.blogspot.saildelmarva.com .

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Secure the preventer and lash the halyards as you describe. Every cruising yacht should have a preventer.

I’d love more detail plus photos and diagrams to illustrate how these various halyard quieting options work. I don’t know how many sleepless nights I’ve had, at anchor, when the wind picks up and halyards start slapping the mast. My normal practice is to use a short length of line to pull the halyard away from the mast by tieing it to the related side stay. This causes the halyard to exit the masthead block at a sideways angle and likely doesn’t do it any good either! I will certainly try the halyard tensioning option as this seems like a simple solution. Paul van de Bospoort Pearson 303 Sun Dance II Wiarton Ontario

What is the solution with external halyards on furling sails

Before turning in I lead halyards out to the lifelines, pass them twice around the lifeline, and then clip the shackle around the halyard itself (not the lifeline). If you clip directly to the lifeline, all night long youwill hear ‘click, click click’ as the shackle wobbles back and forth, hitting the stanchion, again and again. ‘But not too much tension, otherwise the lifeline itself gets unhappy. For the main boom, the gallows works great. For the stay sail club boom on a track, move the track stops to lock it to one side, then tension to the opposite side with a short piece of line.

Tayana 37 Sans Souci

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More than 3000 Monohulls and Catamarans Sailing with Leisure Furl ®

Hoist, reef, and stow your mainsail from the safety of your cockpit.

Leisure Furl in-boom furling is the world’s most popular and well-tested mainsail furling and reefing system. With thousands installed, and millions of offshore miles sailed, it has become the boom furler of choice for experienced performance cruisers around the world. Decades of real life experience tells them they can trust Leisure Furl for smooth reliable operation in even the roughest conditions.

Don’t just take out work for it, let veteran sailing Journalist, Tom Cunliffe tell you his story:

Safe and Easy Mainsail Furling Control from the Safety of Your Cockpit

With a Leisure Furl boom furler, one person can quickly and easily raise, reef, or furl your mainsail without leaving the safety of the cockpit. Just unroll the mainsail from inside the boom furler and go sailing. If the wind comes up, simply reef the mainsail by rolling it back into the boom furler to the desired height. With Leisure Furl, each batten becomes a reef point, so there are virtually unlimited mainsail reefing options. When you’re done sailing, there is also no need to get up on a rocking and dangerous cabin top to flake and sail tie your mainsail, or to stuff it into a large and unsightly lazy jack pack. With Leisure Furl you simply roll the mainsail back into the boom furler and pull the integrated sail cover closed. It’s that easy!

Boom Furling is Far Safer than In-Mast Furling Alternatives

Boom furling also allows for safer troubleshooting because everything is within reach at deck level. With in-mast systems, jams and problems can happen high above the deck, possibly requiring a dangerous trip up the mast to affect any repairs. With Leisure Furl, should a problem occur, our exclusive ratcheting mandrel design allows you to quickly release the system with the pull of a pin so the mainsail be manually rolled back into the boom using a winch handle.

Superior Sail Performance

Unlike in-mast furling systems that require a flat, inefficient battenless mainsail to avoid jamming, Leisure Furl’s elegant in-boom furling design allows the sailmaker to build in a deeper mainsail draft with full length battens. This significantly improves light wind sailing performance so you can do less motoring, and enjoy far more sailing.

Boom Furling Designed to Fit Your Sailboat

Whether you enjoy day sailing, coastal cruising, or true offshore bluewater passagemaking, each new Leisure Furl boom furler is custom engineered to fit. We use a proprietary multi-factor design program to spec your boom, and then build it to exactly fit your boat’s dimensions and sail plan. Available for boats ranging from 27’ to 70’, we offer three base models designed to fit your sailing type, including the Offshore, the Passagemaker, and the Coastal. All three Leisure Furl models can be made of aluminum or carbon and customized with a variety of finishes to match your aesthetic needs. With proper installation and a quick training session, a new Leisure Furl in-boom furling system is the safest and easiest way to set your mainsail, especially with a shorthanded sailing crew.

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Testimonials

Our Leisure Furl Coastal, in boom, mainsail-furling system has been installed on our Catalina 30 for approximately six months now. We could not be more pleased. The system has worked flawlessly from the day it was installed. It has given us the confidence to sail short-handed in conditions where we would have hesitated with a conventional reefing system. My wife especially likes not having to deal with the sail ties and the dirty mainsail cover. The design, engineering and production quality of the Leisure Furl Coastal™ system is better than other systems that we looked at.

Sincerely. William E. Garrett, Jr., CPM President Inter-Pacific Asset Management Westminster, California

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22322 Gilberto, Rancho Santa Margarita, CA 92688

Website Created by Digital Design Solutions

Dwyer Mast & Rigging offers 20+ extrusions for masts and booms on sailboats up to 30 feet. Please review our list of current extrusion profiles below. Extrusion is priced per foot and sold a custom quote basis. Contact our team today to discuss your order.

Extrusion DM-6

Extrusion DM-5

SKU: DM-500

Extrusion DM-500

SKU: DM-450

Extrusion DM-450

Extrusion DM-4

SKU: DM-400

Extrusion DM-400

SKU: DM-375

Extrusion DM-375

SKU: DM-368

Extrusion DM-368

SKU: DM-330

Extrusion DM-330

Extrusion DM-3

SKU: DM-284

Extrusion DM-284

SKU: DM-275

Extrusion DM-275

Extrusion DM-2

Extrusion DM-20

Extrusion DM-1

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How much for a new boom?

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Has anyone bought a replacement boom recently? Looking at a boat that needs a new boom. 35 footer. Just looking for what others have paid for similar length. Boom is about 13ft.  

Nothing wrong with used or salvaged booms. Sailorman has a 14.5 ft for $150.00. They can be cut down.  

Looking for new price as we are needing a cost to negotiate the purchase price. We might end up with a used one but want to negotiate a fair price reflective of the boom replacement need.  

Try usspars.com. They sell new booms.  

geda- If you really want "apples to apples" I'd call the original spar maker, if they're still in business. And of course add $hipping. But as long as they gooseneck fits properly, there should be a used something-or-other available for much less. Every time a boat gets bent, there's usually a good boom left on it.  

Also, even with a new spar, you will need to make modifications, or additions for the particulars of the boat. Reef positions, vang attachments, and such. I think you should be offering what you think the boat is worth whole, minus a lot more than what it will cost to replace the boom.  

The spar itself is the simplest part. If you need 'everything else' to make it mate and work properly...large jar of vaseline...  

Do you need just the extrusion or also the two end caps? I agree with the suggestion to contact the original spar maker if they are still around and get a quote on a new replacement, I would expect something in the area of $3000+. If you need the end caps, whether you can get a direct replacement becomes a driving issue as the gooseneck boom/mast fittings are likely to be proprietary, ie not interchangeable with a different vendor. So if you can't get a new or salvage direct replacement, then if you are looking for a similar size salvage boom, you may need to get the mast mount that goes with that boom, which I suspect are generally not included... I would not assume that just a big credit $3-4000 say will cover you unless you have a replacement that fits identified, as the fact the current owner is selling the boat without a boom would suggest that getting a suitable replacement is not an easy task.  

I think if you want to get the cost of a new boom, you must also consider the cost of a rigger. Since you didn't specify the type of boat or age that might not be accurate. If it's a 25 year old boat, then I doubt the owner would consider reducing all the costs of a new boom. You would have been buying a used boom on a used boat. If it's a 5 yr old boat, well, now we are talking a new boom. +, - or anything in between is just more negotiation.  

Unless the boom is missing, you should be able to recycle the hardware and apply it to a used extrusion. This should not be a huge cost issue. My 35’ boat is 28 yrs old and—being in good condition—the boom hardware could readily be recycled if it were bent for some reason.  

I replaced a 10' boom a few years back from USSpar, as I have a ZSpar. US vs European name. A bit under $700 including shipping from Florida to Seattle. I was expecting more at the time. Your boom section may be bigger in diameter, along with 5' longer......double the cost?!?!! My swag anyhow. USSpar does have SPAr sizing for many brands. Could be worth a call. Marty  

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Boomkicker for sailboats 27 to 30' (K01000)

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• Boomkicker K1000 Installation Instructions

Manufacturer part #: K1000 Boomkickers use two coated solid fiberglass spring rods to provide the force necessary to support the boom and mainsail. The rods are clamped into teflon anodized aluminum end pieces and attached to universal mast and boom fittings. Fittings are included along with machine screw fasteners, the proper drill and tap and hex wrench. The mast fitting includes a round slide which, used in the luff groove, avoids drilling into the mast. Flat slides in varying widths are available from the factory. The slides can often be inserted at the sail opening above the gooseneck and slid down reassembling the fitting in position. If slides are not usable, the fitting can be attached directly to the mast using the same drill and tap provided for the boom. The custom extruded boom track is contoured to fit both round and flat bottom booms. The track has an adjustable clevis pin to set the maximum height the Boomkicker will lift the boom. The track length forward of the pin allows the boom to move higher if needed.