LiftMaster MA117 Counterweight — Documented 15-Foot Mega Arm Configurations
LiftMaster MA117 Counterweight — Documented 15-Foot Mega Arm Configurations
The LiftMaster MA117 is the counterweight identified in the Mega Arm family accessory guide for documented 15-foot barrier arms. The guide specifies it with the MA115, MA116 and MA116R arm options. Select the counterweight as part of the complete operator-and-arm configuration rather than as a general way to make any barrier lift more easily. The arm model, length, mounting and operator variant must all agree with the manufacturer’s approved arrangement.
Compatibility — Models, Versions and Exclusions
| Model or selection point | Compatibility requirement |
|---|---|
| MA115 15-foot arm | Manufacturer accessory guide identifies MA117 as required. |
| MA116 / MA116R 15-foot arms | Manufacturer guide identifies the counterweight requirement for these arm options. |
| Shorter or articulated arms | Do not assume the same weight or mounting arrangement applies. |
| Sprint configurations | Check the exact operator’s arm limits and approved accessories before selecting a long arm. |
| Custom signs, lighting or added arm weight | Require evaluation; a counterweight does not automatically authorize additional loading. |
Match the Counterweight to the Complete Arm Assembly
Counterweight selection depends on the installed arm configuration, including its length and approved accessories. Record the actual arm model rather than estimating from the lane width. If the arm has been shortened, replaced or fitted with additional equipment, have the installer check the resulting arrangement before ordering or moving a counterweight.
The counterweight does not repair a worn reducer, damaged arm bracket or binding shaft. An arm that travels unevenly needs a mechanical inspection before balance changes are made. Follow the prescribed mounting and adjustment procedure, then verify the arm through its complete travel. Do not improvise by adding scrap weight or using an unapproved mounting position to change the behavior.
Specifications and Product Identification
| Specification | Details |
|---|---|
| Model | MA117 |
| Product type | Barrier-arm counterweight |
| Documented use | Required for the listed 15-foot arm options |
| Listed arm examples | MA115, MA116 and MA116R |
| System role | Mechanical balancing within the documented arm configuration |
| Selection requirement | Exact operator, arm and accessory instructions |
Before Ordering
- Record the exact barrier operator and arm model.
- Confirm the documented MA117 requirement for the selected arm.
- Inspect the arm, mounting bracket, shaft and existing hardware.
- Plan secure support of the arm and counterweight during installation and testing.
Package Contents and Separate Requirements
This offer identifies the MA117 counterweight. A barrier arm, operator, arm bracket and a complete mounting-hardware package are not promised as included. Confirm the current carton and the installation hardware required for the particular arm arrangement. The weight is a component of a specified system, not a complete long-arm conversion package on its own.
Safety Warnings — Read Before Installation or Service
- WARNING: An unsupported barrier arm or counterweight can move unexpectedly and cause serious injury. Use a qualified gate technician and secure both before loosening hardware.
- Disconnect AC and battery power as directed and close the lane to traffic during service.
- Use only the documented arm, counterweight and mounting configuration. Do not add improvised weights or exceed the operator’s approved arm limits.
- Check all retaining hardware and complete the required travel and protection tests before reopening the lane.
Related Products and Important Differences
- LMRRUL monitored photo eye — a separate protection option only where the exact operator and control revision approve it; not a universal legacy retrofit.
- LMWEKITU monitored wireless edge kit — a separate edge communication system for approved controls and resistive edges; not a replacement for this mechanical or electrical service part.
Frequently Asked Questions
Is MA117 required for every Mega Arm?
No. The manufacturer identifies it for particular 15-foot arm configurations; check the exact system.
Can it let a Sprint operator use any longer arm?
No. Counterweight selection does not override the operator’s approved arm and speed limitations.
Will it fix a damaged gearbox?
No. Mechanical drive faults require their own diagnosis and repair.
Does it include the 15-foot arm?
No arm is promised in this counterweight offer. Select the documented arm and required hardware separately.
Need Help Confirming the Right Product?
Contact Garage-DoorParts.com before ordering. Send the full equipment model, readable part labels and photographs of the installed assembly. Include the dimensions, electrical configuration or accessory details relevant to your project so the listing can be checked against the actual installation.
Details
Need Help With Compatibility?
Not sure if this is the correct part for your garage door, operator, gate system, or application? Contact Us before ordering — we’re happy to help.
Garage-DoorParts.com carries a large selection of residential and commercial parts, and many components can look similar while having important differences in dimensions, model numbers, voltage, mounting, or compatibility.
For the best assistance, please provide as much information as possible, including the manufacturer, model number, part number, door or operator type, dimensions, and clear photos of the existing part or equipment.
Our goal is to help you identify the correct product before you order and reduce the possibility of ordering an incompatible part.
Contact Us with your product questions and compatibility information, and we’ll do our best to point you in the right direction.
Shipping & Returns
We strive to process and ship all orders in a timely manner, working diligently to ensure that your items are on their way to you as soon as possible.
We are committed to ensuring a positive shopping experience for all our customers. If for any reason you wish to return an item, we invite you to reach out to our team for assistance, and we will evaluate every return request with care and consideration.
Shop The Full Collection
