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Mighty Mule

Model # FM402

Internet # 203008716

Store SKU # 193241

Medium Duty Dual Swing Automatic Gate System

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

$559.00 /each




Model # FM402

Internet # 203008716

Store SKU # 193241

The FM402 Dual Automatic Gate system is a Home Depot Exclusive Kit! The FM402 Medium Duty Dual Swing system is designed for dual swing gates up to 12 ft. long, or up to 300 lbs. per panel. The system is ideal for dual vinyl, tubular steel farm gates, chain link or wood gates. The operator allows you to activate your automatic gate system by remote, keypad or indoor base station; Single Button Remote (FM135) included.

  • Includes 2 single button access remotes (FM135), AC transformer (RB570), battery (FM150), control box, all required hardware and a detailed installation manual with an interactive DVD
  • Designed for Dual swing gates weighing up to a maximum of 12 ft. or a maximum of 300 lbs.
  • Perfect for all gate types including vinyl, tubular steel farm gates, chain link or wood gates
  • 30% Residential Energy Efficient Property Tax Credit available! Residential home owners can use this credit on a new operator system, accessories and installation with the purchase of a Mighty Mule Solar Panel; 10-Watt (FM123)
  • Mighty Mule offers strong elegant steel gates on that can be shipped directly to your home!
  • Backed by an 18 month Mighty Mule Warranty and Technical Support

  • Home Depot Protection Plan Available

    Home Depot Protection Plan

Info & Guides

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Maximum gate size (ft.) 
Product Depth (in.) 
Product Height (in.) 
Product Width (in.) 
Commercial/Residential Use 
Fencing Product Type 
Gate Opener Kit 
Gate opening style 
Hardware Included 
Lighting Included 
Power Requirements 
AC or Solar 
Product Weight (lb.) 
41.1 lb 
Remote control included 
Weight Capacity (lb.) 
Wired or Wireless 
Warranty / Certifications
Manufacturer Warranty 
18 Month 


Rated 3.6 out of 5 by 15 reviewers.
Rated 5.0 out of 5.0 by Great opener! Didn't have any trouble installing. I added a few Mighty Mule accessories, such as a wireless keypad, wireless exit sensor. Also added a solar panel (not Mighty Mule's kit), as the gate is over 100 yards from the house. All are working great. I'ts only been a few weeks, so we'll see how it does thru the winter. November 3, 2015
Rated 3.0 out of 5.0 by Product works like it should...but not perfect. The Medium Duty Dual Swing Automatic Gate System works as expected but it is far from perfect. The brackets are made to attach to a curved metal post. If that is what you are using to hang your gate opener on, then you're going to be very happy. If your gate attaches to flat columns, then you are going to the hardware store to make modifications. Also, the units are very loud and slow. I expected slow, but the loudness is annoying. Overall though, the gates open and close without any problems. If it holds up for the next ten years, (as it has for the last two weeks) then I will be happy with my purchase. April 14, 2015
Rated 1.0 out of 5.0 by DONT BUY THIS !!! First the remote that we use to open the gate from a distance don't send a clear signal, you have to be close to the control box like maybe 60 or 70 feet for it to work every time. Second ... after one years we had to call then to have a new control board because the one we had was acting weird, making weird beep beep beep !!! and son on ... After 10 months receiving the new control board, now the gate often refuse to completely open. It start to open and then in the middle of it shut back. We have to go to the control board and set the switch to off and the turn it on and try again to open the gate. Sometime it works sometime it don't. It happen many many time in a week like 3 or 4 time a week. Very annoying when someone is waiting at the gate and you try to opine and it does not. WE CALL THEM and the only solution they have for us is to buy a NEW HOLE KIT !!!! BECAUSE they cannot tell if it is the electronic board that is defect or if it is one of the two arm !!! The brand is GTO for Gate That Open ... yes Gate That Open ? are you serious ??? April 14, 2015
Rated 1.0 out of 5.0 by Problems so far. Let's see how customer services/warranty will handle it I hope to change my opinion in a few days but this is my story so far: - Connected the gate opener arms. Looks good but I did not like that the 2 ends of the arms are plastic. My previous one (Zareba) was metal. These plastics will eventually crack. - Followed the instructions to connect the control box to the battery and it beeped loud non stop. - I then decided to proceed without the battery (there is nothing in the manual saying I should not). - Connected everything and it did not work. Even tried to connect the battery again but then, besides the beep, the control board was smoking. They did not agree to send me a new control board before looking at what is wrong to the current one and if it is damaged because of something I did. Tech Support says it would not work without the battery, but was more concerned on what I did wrong rather than listening that the unit beeped NON STOP in the first place before I connected anything else just by connecting the battery. I hope to come back in a few days and change my rating and comments here to show an outstanding customer support. August 3, 2015
Rated 4.0 out of 5.0 by Meets Expectations Installed myself and used daily for access by my wife and I. The DIY was easy and needed a 2nd hand from time to time. Much cheaper than most other options I found online. I also ordered the open from property bracket for my gate and I am happy with the results. Louder than expected, but not issue. Hanging wires are ugly, but not too noticeable once zip-tied to brackets. Remote range is about 300ft. September 8, 2015
Rated 3.0 out of 5.0 by wouldnt do it again Now that I finally installed it I can say I would not do it again. After spending three agonizing days, I'm glad I'm finally done but would notpurchase this again.the best recommendation I have is to read through the instructions from start to finish at least twice before you start. The parameters for the bracket are super important and the fact that the arm has to be extended at least 7 inches in order to set the limit on the gate is a key fact. I learned this after spending all day with technical support on the phone to no avail. They sent me on a wild goose chase stating first it was a bad battery then it was a bad control board, while in actuality it was a problem of they arm not being extended 7 inches exactly in order to set the limit. So bottom line is read all of the instructions closely and do not rely on technical support for any valuable assistance. I have had them working about 2 weeks now without a problem but they are very slow to open and close the gate, and a little noisy. But for the price what do you expect. May 11, 2013
Rated 4.0 out of 5.0 by Great so far Installed 100% by myself (not recommended btw) so it took me about 8 hours to complete. Only issue so far is the solar panel just takes too long to charge battery accurately. Started with a 5 watt, and have now ordered a 15 watt (time will tell if it works better). Did not try A/C plug to charge as it's approx. 500' from power source. Gate opener is slow to open & close, but not too bad. I checked several other sources and HD had the best price by far. No complaints after 2 weeks - works as expected, just hope it lasts long enough to be worth the expense. Installed on fairly light tube gates. Biggest concern after installation is every single connection point is plastic? March 18, 2015
Rated 1.0 out of 5.0 by Stay far Away!!! I have had the Mighty Mule 502 for a couple of years now and it has never worked for more than 2 weeks at a time. Here is what concerns me most about this company, I had a contractor install the arms using the directions which were provided by the company. After the installation was complete, the arms did not work, finally we decided to contact their tech support department which explained to my contractor that he should not follow the directions inside the box and to just follow his instructions over the phone, well that's great, useless instructions which drove me mad. Fast forward 2 years later, I wanted to add an exit wand to my gate, previously we had a wireless one which only worked on and off at best, it was very temperamental. After installing the new exit wand exactly the way the on-line tech support instructions told me too, it of course did not work, so I returned the wand to Home Depot thinking it was bad. I ordered a 2nd wand on-line hoping that the first one I purchased was just a dud and again I installed it as the directions indicated except this time I noticed in the directions indicated that there should be a "Range Adjustment Control Board" on the panel with a yellow wire coming out. I had no such board or yellow wire which led me to call tech support again. As was the case previously, the tech guy said."oh, you must have old instructions, don't pay attention to that, I will walk you through it". REALLY?? So every bit of instructions this company provides is useless and outdated, do not buy if you think this is an easy do it yourself project, they take no pride in their products and customer service has never been helpful. May 9, 2014
  • 2015-11-26 T11:01:38.082-06:00
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