19th September 2020 |

LMB-F1 Self Levelling Radar Mount – Backstay

Mounts forward of backstay – for 2kW / 4kW Raymarine, Garmin and Navico BR24 / 3G / 4G radomes

LMB-F1 Self Levelling Radar Mount – BackstayLMB-F1 Self Levelling Radar Mount – BackstayLMB-F1 Self Levelling Radar Mount – Backstay



For Radomes

Our Self-Levelling Radar Mount range ensures your radar stays level with the horizon at all times for optimum antenna performance.

As the boat heels or rolls, the radar is kept horizontal preventing target loss and giving the best possible radar picture.

Our Backstay mounted version positions your radar away from any interference, leaving a clear deck free from obstruction.


Hydraulic Damping

The main levelling unit features a fine turned damping system which reacts to major changes in heel angle of the boat. It is entirely maintenance free and no power is required

Bespoke Mounting Pole

2.6m (8’6”) aluminium mounting pole, supplied in 2 lengths with hidden joiner piece. Cables are routed down a cable channel for a neat install

High strength universal base for mounting pole

Eliminates loading on backstay. base can be deck, transom or chainplate mounted

Suitable for any yacht

Stainless radome cradle has a fine tune adjustment for backstay angle and the product can be installed on both adjustable and split backstays (see FAQ for further information)

Nylon Backstay Bushing Supplied

Clamps around backstay allowing cable tension to be adjusted

Mount Your Radar Higher

Additional 0.6m and 1.3m lengths available to mount your radome higher

Also available in Pole or Mast mounted versions.



Technical Information


How to Install your Scanstrut


Scanstrut Brochure



LM-GPS GPS / VHF Antenna Mount

LM-GPS no antenna 2019

Product Details


Can this product be installed on boats with a split backstay or runners?

Option 1:

If backstay split length is less than 2.7m (8’10”) above the deck, you can mount the system centrally and attach head unit onto the central cable above split. Pole extensions available to raise antenna higher.

This is not really satisfactory in most cases because it will obstruct aft access to the bathing platform.

Option 2:

If backstay split length is over 2.7m (8’10”) above the deck, you can install the mounting pole and head unit parallel to lower backstay.

If the leveller pole is to be installed parallel to one of the ‘splits’, in most cases it will be difficult to correctly orientate the assembly (i.e. with radar and swing axis of leveller parallel with yacht’s centreline) using the supplied pole base bracket.

For a satisfactory install, a custom ‘wedge’ must be fabricated to go between the pole base bracket and deck. Another identical wedge will be required on the underside of the deck or transom to provide a perpendicular face for the nuts and washers. The wedges can be planed to the correct angle from a block of hardwood (teak or mahogany or similar). They need to be independently fixed to the deck with fasteners spaced differently to the pole base bracket, to stop it from squeezing out under compression.

This installation requires reasonable backstay tension. If you are likely to completely slacken off the stay during sailing, we recommend installing an alternative Scanstrut product (dedicated stern pole or mast mount).

How will the pole base bracket fit to my backstay chainplate?

You will have to drill and tap the chainplate to accept the 2 x M8 fixings that are supplied with the base fitting.

I am worried about my bimini conflicting with leveller installation.

The best thing to do is to check the technical information. This will show the clearance that you require fore of your backstay when installing the product.

My Raymarine dome does not sit level with the boat is at rest – why is this?

Do not worry, your leveller is still working. The dome’s centre of gravity is off centre resulting in a slight ‘list’ to one side.

Since we became aware of this issue we have offset the holes on the mounting plate and so the dome will now sit level. The new plate is available to purchase should you require it, please contact the Scanstrut sales team.

I have a hydraulic backstay adjuster – will I still be able to install the product?

The product is supplied with backstay bushings which clamp around the backstay. These mean that you can still adjust the tension of your backstay without the Self Levelling product getting in the way.

The maximum diameter for backstay adjuster unit is Ø60mm.

My backstay wire is ø6mm, do you do a head unit bush to accommodate this?

Nylon bushes are supplied for backstays from 7mm (0.2”) up to 14mm (0.6”). You will be able to use the 7mm bush for your 6mm dia. Backstay.

Is the Self Levelling Radar Mount suitable for choppy seas or racing conditions?

YES – The structural strength is exceptional in this product. Our design team completed a shock test on sailor Alex Bennett's boat.

If I am using the backstay as an antenna for my HF radio, will installing the Self Levelling Backstay Mount interfere with this?

The kit is supplied with a nylon bush which fits around the backstay before you clamp the levelling head unit to avoid any metallic connection.

Just ensure that you do not fit the pole base onto the backstay chainplate.

General F.A.Q.'s

I have some old electronics, how can I work out if they will fit your products?

If your electronics are not listed in our part number table, please contact Scanstrut as we may be able to assist with compatibility.

Where can I order this product?

Scanstrut products are available worldwide via our network of distributors.

Visit our 'Dealer Locator' page to find your local dealer.

Can I see this product installed / on display anywhere?

Scanstrut products are displayed at various boat shows throughout the season.

Alternatively, find your local dealer on our where to buy page and see if they have a store to visit.

I am upgrading my marine electronics, will I be able to use the same Scanstrut mount?

It all depends on the electronics you are using - please contact Scanstrut for further assistance.

What part no. do I require?

To find your part number, use our 'Part Finder'.

How much does the product cost?

Pricing for Scanstrut products is available from our network of distributors.

Contact them directly for your local pricing.

I am from the press and I would like more information / pictures on your product.

Good news! Contact our marketing team and they will be happy to help.

Click on 'Contact' in the menu to send your message.


Great Product for Class 40 Race Yacht, 4 Aug 2010

By Alex Bennett - Skipper of Fujifilm, Class 40 racing yacht.
Reliability, safety and performance are key factors when I look for products to use at sea. With that in mind, the Self-Levelling Radar Mount from Scanstrut ticked all the boxes when I needed a mounting solution for my 2kW Raymarine radar. Initially looking for just a simple, fixed mounting solution, I was very pleased to discover Scanstrut's ingenious Self-Levelling system and I knew instantly it was the product I should have.

Reliability and Performance, 4 Aug 2010

By Michael Hennessy, Sailor
When racing Class40 sailboats, you are up against some of the best sailors in the world, in some of the most punishing conditions. As a skipper, you need equipment that delivers rock solid performance, in the most efficient and lightest way possible. Reliability and performance are critical not only for winning races, but also the safety of the boat and those that sail on her. When researching which mount to use for my radar dome, one name kept surfacing.

ScanStrut products are installed on a significant number of the Class40 fleet, by skippers I respect. Their Self-Leveling Radar Mount offers all of the functionality I was looking for, in a robust yet lightweight form. The team from Scanstrut was a pleasure to work with, and I highly recommend their products.

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