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Mighty Mule

Model # FM143

Internet # 100090485

Store SKU # 493385

Automatic Gate Lock for Single and Dual Swing Gate Opener

This item has been discontinued.
The Home Depot no longer carries this specific product.

$119.00 /each




Model # FM143

Internet # 100090485

Store SKU # 493385

Store SO SKU # 556771

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 including models FM200, FM350, FM402, FM500 or FM502
  • Activated by Mighty Mule access controls including the single button remote (FM135), driveway vehicle sensor (FM138), wired or wireless digital keypad (FM137) or the push-button control (FM132)
  • Easy DIY (do it yourself) installation for your gate opener system
  • Installation of the gate lock provides secure protection to withstand up to 2500 lbs. of force, providing stability and security
  • Column-mount lock receiver (433IH) is recommended for use on column-mount single gate installations
  • Includes 2 keys for manual release
  • Backed by a 12 month Mighty Mule warranty and technical support

Info & Guides

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Product Depth (in.) 
Product Height (in.) 
Product Width (in.) 
Brand/Model Compatibility 
Mighty Mule Gate Openers 
Commercial/Residential Use 
Fencing Product Type 
Gate Opener Part/Accessory 
Part/accessory type 
Product Weight (lb.) 
6 lb 
Warranty / Certifications
Manufacturer Warranty 
Backed by a 12 month Mighty Mule warranty and technical support 


Rated 4.6 out of 5 by 32 reviewers.
Rated 4.0 out of 5.0 by Mighty Mule Automatic gate lock Installed the gate lock per the clear instructions and it worked perfectly from the start. June 9, 2015
Rated 5.0 out of 5.0 by Works great This was easy to install and works well. Would buy again. September 22, 2015
Rated 4.0 out of 5.0 by Great additional gear This product is a must if you want to ensure your gate is secure. The Mighty Mule Gate System is not complete without it. We use this to lock the gate in place once it is closed, preventing high winds, pets, or even your neighbor leaning on it, from forcing the gate open. A bit pricey, but cuts the worry of having your pets getting loose. September 8, 2015
Rated 5.0 out of 5.0 by works great Instructions were clear and after finding the correct mounting bolts, clamps and drill bits, installation was fairly easy. I had to do some re-engineering to get it installed on my gate, but I am satisfied. Just count on some extra time looking at your gate and post and figuring out what you need to make it work. September 8, 2015
Rated 5.0 out of 5.0 by Nice lock Easy install. Keeps the gate locked when we aren't here or don't desire company. December 10, 2014
Rated 4.0 out of 5.0 by Nice product, helps with security and protects the hinges and motor when the gate is shut. Easy to install, you will need to get the correct hardware in addition but that was expected. I am using this lock in conjunction with the Mighty Mule FM500 mounted to a 12ft. tube steel livestock type gate. Dual batteries with a 20 watt solar panel and a wireless keypad. The solar panel was purchased separately and is not the Mighty Mule brand. They want way to much money for their little solar panels. I am located in the Pacific NW and the 20 watt, dual battery configuration works flawlessly. Overall this setup is perfect for my application, very happy. January 23, 2015
Rated 1.0 out of 5.0 by 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. November 22, 2014
Rated 5.0 out of 5.0 by Great product with a great price! I looked for the lock on several different websites and Home Depot had the best price I could find anywhere. The shipping was fast. July 28, 2015
  • 2015-10-03T12:04:39.085-05:00
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