Mighty Mule 500 - Single Swing Gate Opener

Solar Powered Compatible
Solar Powered Compatible
  • This product has been updated to meet 2016 UL 325 standards.Please click for the new version, the Mighty Mule MM560.
  • Designed for gates up to 18 ft long or 850 lbs
  • Large control box with room for extra battery and accessories
  • Professional Grade Soft Start / Soft Stop feature increases life of hardware and opener
  • 12-volt battery backup (included) opens and closes the gate even during power outage.
  • 18 month Limited Warranty

Kit Contents
Mounting hardware and brackets, transformer, transmitter, installation manual and DVD, one gate opener arm, control box, receiver, control board and battery.

Gate Length Up to 18 ft
Gate Weight Up to 850 lbs
Warranty 18 month
Gate Type Single Swing
Max Gate Length Max Gate Weight
18 ft 350 lbs
16 ft 450 lbs
14 ft 550 lbs
12 ft 650 lbs
10 ft 750 lbs
6 ft 850 lbs
Don’t see your gate length or weight? Contact us for a custom solution.


Mighty Mule FM500 Gate Opener is rated 4.8 out of 5 by 27.
Rated 5 out of 5 by from Easy to install, does the job After struggling with which gate opener to purchase, I finally came back to the Mighty Mule FM500 and purchased it. It was easy to install and is working as promised. Time will tell if it holds out. So far so good!
Date published: 2015-01-04
Rated 5 out of 5 by from Easy to install and I'm not Mr. Fixit.  Manual  provides clear info and DVD very helpful. If you use the push-to-open bracket on a heavy gate (mine 250 lbs) be certain you have a correct fitting or hardened bolt to secure the angle or it will cut it in half.
Date published: 2013-05-28
Rated 5 out of 5 by from Easy to install, works great I have a 13' steel gate that's trimmed out in bamboo and some redwood. It's not that heavy, maybe 200 lbs. The FM500 has more than enough power and pretty good speed of opening. This is a nice product it works great.
Date published: 2014-10-20
Rated 5 out of 5 by from The new circuit board is easy to understand. This circuit board is user friendly. No need for a separate board for the lock. No need to flip switches for the auto close duration. Easy to read.
Date published: 2015-05-25
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