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Mighty Mule Automatic Gate Lock, FM143-SL

SKU: 360505399
Mighty Mule Automatic Gate Lock, FM143-SL
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Product Rating is 4.5
4.5
 (75)

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Item Information

The Mighty Mule Automatic Gate Lock is ideal for single and dual swing gate openers. Unlocks and locks automatically as the gate is activated to open and close to provide added security for Mighty Mule automatic gate openers. Recommended for gate leafs over 8 ft. long, high wind areas or additional reinforcement against unwanted intrusion to your property.

  • Compatible with single and dual Mighty Mule swing gate openers
  • Easy DIY (do it yourself) installation for your gate opener system
  • Activated by Mighty Mule entry remotes, driveway vehicle sensors, wired or wireless digital keypads
  • Installation of the gate lock provides secure protection to withstand up to 2500 lbs. of force, providing stability and security
  • Includes 2 keys for manual release
  • Backed by a 12-month Mighty Mule warranty and technical support

Specification Description
Finish: Metal
Product Length: 11.25 in.
Brand: Mighty Mule
Type: Automatic Gate Lock for Single and Dual Swing Gate Openers
CountryofOrigin: Imported
Part Number: FM143-SL
Product Height: 2.75 in.
Package Quantity: 1
Mounting Type: Screw on single or dual gates
Special Feature(s): Unlocks and locks automatically as the gate is activated
Application/Use: Unlocks and locks automatically as the gate is activated to open and close to provide added security for Mighty Mule automatic gate openers
Compatibility: Compatible with single and dual Mighty Mule swing gate openers
Product Width: 7.25 in.
Material: Metal
Product Weight: 6.05 lb.
Manufacturer Part Number FM143-SL
Mighty Mule Automatic Gate Lock, FM143-SL is rated 4.4 out of 5 by 51.
Rated 5 out of 5 by from Great lock I bought this lock a few weeks ago and now when the strong winds blow my gate stays shut
Date published: 2019-04-19
Rated 3 out of 5 by from New Gate Installed Obviously the point of reviews is to perhaps try and help others who are considering this purchase. We purchased the MM Double Gate. But please go in with your eyes open on this purchase. There are MULTIPLE additional items you will need to install your gate. Additional items we had to purchase.... Solar Panel, Locking Kit, Keypad, Battery, Battery Box, additional wiring, additional brackets, pvc pipe and fittings (for running the wire through to the box). The instructions do not tell you ahead of time you will most likely need all the additional items. You kind of find out as you go. AND...unfortunately, we may have to purchase the driveway auto open or another keypad if we want our guests to be able to leave once they enter and the gate closes. It is working as expected. The slave gate seems a lot slower than the main gate (on the double gate system). Overall, we spent more than initially anticipated. Would I recommend...??? Yes and no. Just know the costs going in and what it will entail to your particular usage.
Date published: 2019-04-13
Rated 4 out of 5 by from Easily bypassed The locking Pin should be more secure, it can be easily removed with a screwdriver
Date published: 2019-04-12
Rated 5 out of 5 by from Heavy duty built well Provides that peace of mind that your gate is locked
Date published: 2019-04-11
Rated 5 out of 5 by from Mighty mule Gate Lock Great product, keeps the wind from opening the gate a little and intruders.
Date published: 2019-04-08
Rated 5 out of 5 by from Product I was looking for Product was in stock at a local store for quick pickup. It was the manufacturer I was looking for. Good price
Date published: 2019-03-28
Rated 5 out of 5 by from Owner Nice-working automatic lock & unlock feature . Easily installed.
Date published: 2019-03-16
Rated 5 out of 5 by from So far so good! We bought this lock after a recent wind store pushed our gates so hard that it broke the bolts holding the motors on. We were constantly having to adjust the gates after even a slight wind storm. Bought this lock to prevent that and it did its job during our last store. Not to mention people cannot push on the gates enough to slide in...this lock prevents that's. We are very happy with our purchase so far.
Date published: 2019-03-13
Rated 5 out of 5 by from Performs very well! Installation was easy and instructions were easy to follow. Has a heavy duty design.
Date published: 2019-02-26
Rated 5 out of 5 by from Mighty mule gate opener Easy to install works great opens up well over150 ft away
Date published: 2019-02-15
Rated 5 out of 5 by from Just what the doctor ordered Works great keeping my double gates in a closed position during high winds. I should've had this on them years ago. Works perfectly.
Date published: 2019-02-07
Rated 2 out of 5 by from NOT GREAT LOT MONEY We bought this a mouth ago has problem with actuators .They fail to close properly. They bounce a lot witch causes them to close or reopen many times .If you think you can install them yourself you mite want to get help witch will cost you more money . We did read about them a lot but we feel we were miss informed on guilty .and performance . Its a lot of money to have so many problems .
Date published: 2019-02-01
Rated 5 out of 5 by from Gate lock Overall I am very pleased with this product. Heavy Duty and works well. It was fairly easy to install.
Date published: 2019-01-12
Rated 4 out of 5 by from Product works great and easy to install. Product works great and easy to install. The only reason I am not rating it a 5 is due to the Pin for the lock has a cap that has to be tapped from the bottom. This resulted in purchasing additional caps for the pin due to difficulties in getting it secured. Must be a better option of some kind.
Date published: 2019-01-07
Rated 5 out of 5 by from Mighty Mule Auto Gate Lock I bought it a few weeks ago so far love it. I would buy it again.
Date published: 2019-01-01
Rated 4 out of 5 by from Great opener The lock worked great and was easy to install. I did however have to pick up some more hardware to get it installed.
Date published: 2018-12-28
Rated 5 out of 5 by from Well made This lock is well made, rugged and easy to install.
Date published: 2018-12-04
Rated 5 out of 5 by from Lock em up This is second to be installed on the property. Will be buying the third very soon. Great product, no problems so far.
Date published: 2018-11-25
Rated 5 out of 5 by from lock it down Easy to install instructions and operation. Give a very secure locking system.
Date published: 2018-11-21
Rated 5 out of 5 by from Great Gate Lock Easy to install and Love the extra security; heavy duty
Date published: 2018-11-19
Rated 5 out of 5 by from Looks easy to install Haven't put it on yet. But seems to be easy to install
Date published: 2018-11-14
Rated 4 out of 5 by from Auto lock After installing the gate opener it easy to get the lock on
Date published: 2018-11-08
Rated 5 out of 5 by from Works without any problems I bought about a month or so ago and I love the security it gives me when I’m home at night
Date published: 2018-11-08
Rated 5 out of 5 by from Gate lock I am very happy with it so far, that is all I've got to say about the product, it makes it very convenient for my electric gate
Date published: 2018-10-31
Rated 4 out of 5 by from Easy installation Easy to install, works great. The opener itself allowed the wind to blow the gate open enough for my horses to get out, this stops that. I can leave home without worrying now. I do think that clamps should be included, though. I had a hard time finding ones that would fit and even then I had to hammer and bend them
Date published: 2018-10-15
Rated 5 out of 5 by from Exactly What We Needed Got this a few weeks ago and has worked perfectly!
Date published: 2018-10-13
Rated 5 out of 5 by from Gate Lock This was one of the best items we purchased in establishing the security of our property. It was easy to install and works very well.
Date published: 2018-09-20
Rated 4 out of 5 by from Tough gate lock Works great with my Mighty Mule opener to secure the gate when the wind blows!!
Date published: 2017-08-03
Rated 5 out of 5 by from Help It has been installed but we can't figure out the electrical hookup . I am hoping to find someone that knows electrical hookups to finish the hookup so I can enjoy how it will lock shut my gate.
Date published: 2016-09-05
Rated 1 out of 5 by from Latch closes to soon I have installed the mighty mule gate openers on many gates in many different areas. This is the first time I have installed the lock. The latch releases so fast that is catches the gate before it can open past the pin. This causes the fuse to blow in the opener. I can't understand why the latch has to close so fast. There should be a timer setting or there is no need for the latch to close before the gate is fully open. I had to do some creative engineering (ie: I installed a spring inside the catch to push the gate open quickly before the latch closed). It still only works part time.
Date published: 2014-11-22
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Does the latch draw any power when gate is not being opened or closed? Can it be used on a solar only setup?

Asked by: MNGTO
This gate lock does not use any power when the gate opener is in a resting position, when activated to open or close it used 4-5 amps. The gate lock can be used in both settings, either AC or solar.
Answered by: MightyMuleSupport
Date published: 2019-02-08

How long is the control cable supplied with the lock?

Asked by: Hbcraft
Hbcraft, The control cable is approximately 30 feet. Thank you for posting your question.
Answered by: MightyMuleSupport
Date published: 2018-11-05

Is there a place to get the installation manual prior to purchase? I want to make sure it meets my needs prior to purchase.

Asked by: ChasDD
Hi, yes we have our manuals located on MightyMule.com. Go to the support tab and select "manuals" and any of our products manuals will be listed there. For Technical Support related questions, please contact Mighty Mule Technical Support at 800.543.1236.
Answered by: MightyMuleSupport
Date published: 2019-01-29

To follow up on Mavaholic's question about the lock failing (which can happen to any mechanical device, so don't tell us that "the lock will always open": If the lock fails, will it damage the gate openers?

Asked by: TexanSV
TexanSV, Thank you for posting your follow up question. If the gate lock (model # FM143) failed to activate upon gate opening activation the gate opener would attempt to open and then close. This failed opening attempted would most likely cause the gate openers control board to blow a fuse. Thank you!
Answered by: MightyMuleSupport
Date published: 2019-04-16

Is there a magnetic "catch" or other product for the MightMule that simply "pulls the gate" fully closed so my dogs don't stick their head in the gap between the post and the gate and slip through?

Asked by: MickMichael
Hi Mick, the Mighty Mule Automatic Gate Lock uses a latch not magnet to hold the gate panel closed. This lock can withstand up to 2500 lbs. of force, so it should be able to hold in the panel not allowing your pet's to open the gate.
Answered by: MightyMuleSupport
Date published: 2019-04-11

Can this lock be used on a solar 360 opener?

Asked by: Zip2003
Zip2003, Yes it can. However depending on the size of battery you are using to power your gate opener and solar panel wattage you are using you may have to use two 10 watt solar panels to effectively keep your battery charged. Thank you for posting your question!
Answered by: MightyMuleSupport
Date published: 2019-01-26

Gate lock is opening as it should but then re-locking before gate is clear of locking mech making the gate open fail. Is there a way to adjust this unlock/lock delay on this lock?

Asked by: Dulcich
Hi, can you please give us a call into Mighty Mule Technical Support? We need some additional information and can assist you over the phone. One of our Technical Support Representatives will be able to assist you every step of the way 6 days a week Monday - Friday 8am - 6:50pm EST & Saturdays 9am - 6pm EST at 800.543.1236.
Answered by: MightyMuleSupport
Date published: 2018-05-06

If the lock fails to unlock when the gate is trying to open will this damage the actuator mechanism?

Asked by: Mavaholic
Mavaholic, Thank you for posting your question! The Mighty Mule Gate lock is activated when your entry/exit remote is pressed. The gate lock will always unlock before the gate is activated. Thank you!
Answered by: MightyMuleSupport
Date published: 2019-02-12
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