0090835093001

Mighty Mule

Model FM502

Internet #100095256

Store SO SKU #1000063158

Heavy Duty Dual Swing Automatic Gate Opener

Was  $640.29
$576.26 /each

Save $64.03 (10%)  through 08/31/2016

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Price Valid : 08/18/2016 - 08/31/2016
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  • Designed for the "Do-it-Yourself" Installer
  • Mighty Mule's strongest dual swing gate opener
  • Ideal for dual swing gates up to 18 ft. or 850 lbs.

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Product Overview

The Heavy-Duty Dual Swing Automatic Gate Opener (FM502) is Mighty Mule's strongest dual gate operator. This gate opener is designed for dual swing gates up to 18 ft. or weighing up to 850 lbs. per panel. Ideal for ornamental, vinyl, tubular steel farm gates, chain link or wood gates.

  • Includes: FM502 dual opener kit (control box, FM150 battery, FM135 transmitter, AC transformer and mounting hardware)
  • Gates that open away from the property will require two push-to-open brackets (FM148, not included)
  • Transform this unit to a solar gate opener by using the solar panel charging kit (FM123, not included)
  • Mighty Mule accessories allow you to customize your gate opener system with additional entry transmitters, keypad/intercoms, and more


  • Mighty Mule offers strong, elegant steel gates available on homedepot.com that can be shipped directly to your home
  • Backed by a 18-month Mighty Mule warranty and technical support
  • Click here for more information on Electronic Recycling Programs

Info & Guides

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Customer Questions & Answers

21 Questions26 Answers

Customer Questions & Answers

Heavy Duty Dual Swing Automatic Gate Opener
Heavy Duty Dual Swing Automatic Gate Opener

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3 answers

I would need more then one remote? Does it give instructions on How to set them up?

This question is from Heavy Duty Dual Swing Automatic Gate Opener
Asked by
Kula Maui
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July 12, 2016
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Answers (3)

Asked by
san francisco, ca
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August 2, 2016
Answer: 
Remotes are much smaller than my previous ones(Keystone brand) and work better.
Setup is really easy; simply flip 1-2 code switch as same as the one in control box. Instruction enclosed is helpful.
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Asked by
Orlando
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Home Improvement Profile: DIYer
July 20, 2016
Answer: 
Yes, it is the same. I have three remotes and was simple to do.
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Asked by
Read all my Q&A
July 14, 2016
Answer: 
Hello Kula,
Yes, we offer a few different remotes to add to you gate opening system, The model numbers are FM135, FM134, and MM3BT. All of these products are available for purchase on HomeDepot.com. Each additional remote will come with detailed installation instructions.
Thank you,
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2 answers

Can Key Pads Be Purchased Without Posts

This question is from Heavy Duty Dual Swing Automatic Gate Opener
Asked by
Houston
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July 18, 2016
I already have key pad posts. Can I order the key pads only? If yes, how much?
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Asked by
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July 20, 2016
Answer: 
Fisherman,
Thank you for posting your question. Yes, we do offer keypads without post. We have different models available (model #'s MMKPD and FM136), both can be purchased on HomeDepot.com or special ordered in any Home depot store.
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Asked by
Orlando
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Home Improvement Profile: DIYer
July 20, 2016
Answer: 
Yes...that is what I did as I used my existing pole ad replaced the old one. I used this one: http://www.homedepot.com/p/Mighty-Mule-Weatherproof-LED-Wireless-Keypad-MMKPD/204310502
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2 answers

does this work in the snow? and is it powerful enough to push snow?

This question is from Heavy Duty Dual Swing Automatic Gate Opener
Asked by
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June 6, 2016
will it charge in the snow. I have the 502 with solar thanks.
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Asked by
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June 8, 2016
Answer: 
Dave,
Thank you for taking the time to post your question. The FM502 Heavy Duty Dual Gate Opener is rated for rated for -5 ºF to +160 ºF (-28 ºC to +71 ºC), however they are not designed to push snow.
Thank you,
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June 7, 2016
Answer: 
This item works in snow.
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2 answers

fail safe

This question is from Heavy Duty Dual Swing Automatic Gate Opener
Asked by
California
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February 9, 2016
If all power sources fail for whatever reason, can the gate be opened manually without damage to the gate or opener? If so, is it secure? meaning other people won't be able to override the auto opener, correct?
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Answers (2)

February 12, 2016
Answer: 
Yes, you can still manually open the gate if you need to. Yes, the gate opener can be secured against being dismantled.
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Asked by
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February 10, 2016
Answer: 
Hello Teddy,
Thank you for taking the time to post your question. Yes, you can always manually open your gate opener at any time that you wish without damaging the gate opener or gate. To manually open your gate, turn the control box power switch off, remove the hairpin clip, clevis pin, and bushing from either the front or rear mounting point, then remove the opener from the mounts. To prevent any Read More
Hello Teddy,
Thank you for taking the time to post your question. Yes, you can always manually open your gate opener at any time that you wish without damaging the gate opener or gate. To manually open your gate, turn the control box power switch off, remove the hairpin clip, clevis pin, and bushing from either the front or rear mounting point, then remove the opener from the mounts. To prevent any unwanted people removing your gate opener, substitute the clevis pin for a Pin Lock ( model # FM133). The pin locks can be purchased online at Home Depot.com or from select Home Depot stores. To see a diagram on how to manually open your gate opener, please refer to the "installation guide" on the FM502 product page. The installation guide is located under ''Info & Guides" on the FM502 product page on HomeDepot.com. Thank you, Read Less
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Customer Reviews

Rated 4.0 out of 5 by 48 reviewers.
Rated 4.0 out of 5.0 by MIGHTY MULE DUEL GATE OPENER Everything from ordering to delivery turned out to be excellent and installation wasn't that complicate either. It opens and closes smoothly but with some noise a bit louder than expected. But my main concern is, how long it will last? Many previous owners complained about malfunctioning of operating arms or control board after 1 month thru 2 years usage. Only time can tell. My previous model was FAAC brand which worked fine for 5 years then developed a serious problem with the receiver unit, caused several parts replacement at $150 but finally ended up in trash can. I hope this new opener proves all the negative reviews incorrect. June 28, 2016
Rated 1.0 out of 5.0 by mighty mule Do not buy this product. It is absolutely foreign made junk August 1, 2016
Rated 5.0 out of 5.0 by Great replacement for older Mule I still had all of my old mounts which easily adapted to the newer opener. My biggest challenge was getting the cable through the old conduit for my double gates. As for the product, the installation minus the conduit was easy to install and I am not an electrician or a trained installer. This said, due to running the wire, the install did take me about 10 hours. Also, one word of advice, read the directions then read them again carefully. I made one dumb two hour mistake that was simply not reading the directions. July 19, 2016
Rated 3.0 out of 5.0 by Issues but value balanced The dual gate set up opens and closes fine, but the remote openers (bought separately) are junk. One came with the unit, 5 others I ordered (total of 6) trying to find 3 that work. One remote kills batteries in a few days, some of the others simply will not work. The ones that do work have a short range (about 75', and 3 of them I ordered are "extended range pro" which is bull) If anyone knows better remote openers from some other company, I'd like to know about them. I installed an entry key pad and the automatic gate lock, both work great. I also picked up buried vehicle sensor to auto open the gate to let guests out, but what they do not tell you is if you have any electrical cables near the sensor, it will not work. When you call to complain, they tell you they know it is an issue but its not written into any literature so they sent a small potentiometer to put in the wiring, which so far has made the auto open sensor work as advertised but using a smaller sensing area. (cars have to be closer to it to open the gate) If you have expectations of flawless use, find a higher end product. If you want something that gets you buy with some security, this does work. July 26, 2016
Rated 3.0 out of 5.0 by not easy or simple For all you DIYers out there, make sure you have the gate frame made in steal or iron. A wooden framed gate will not work. You can dress the metal frame up with wooden pickets to match your fence though... May 3, 2016
Rated 5.0 out of 5.0 by Mighty Mule gate opener Best gate opener for the money, I installed it myself as usual and it went very easy. March 15, 2016
Rated 5.0 out of 5.0 by Replaced Mighty Mule openers destroyed by crazy ants. Since we were replacing Mighty Mules that were virtually destroyed by crazy ants, our mountings were already in place so this was very easy. The board had been changed so I had to relearn how to program it but it went quickly. We were even able to reprogram our older (and some much older) controllers so we have spares now. LOVE my Mighty Mules! March 1, 2016
Rated 4.0 out of 5.0 by WORKS GREAT Replaced an older model that stopped working, so it was easy to install. However the cable for the second gate opener was about five feet short and had to splice the cable, which is not recommended, was just long enough to reach the end of the conduit but not long enough to reach the control module.I installed a watertight box just above the ground to protect the splice from moisture. The receiver for the remote control has less range than the old model. other than that it works satisfactorily. January 19, 2016
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