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  1. Trailer Jack
  2. etrailer
  3. Side Frame Mount Jack
  4. 2001 - 3000 lbs
  5. Sidewind Jack
  6. Drop Leg
Square Jack w/ Footplate - Drop Leg - Bolt On - Zinc - Sidewind - 29-1/8" Lift - 2.5K

Square Jack w/ Footplate - Drop Leg - Bolt On - Zinc - Sidewind - 29-1/8" Lift - 2.5K

Item # MJSQ-2500B
Our Price: $82.59
You Save: 5%
Trailer Jack
This item qualifies for Free Shipping
Shipping Weight: 23 lbs
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Rust-resistant jack is great for marine use. Square design offers superior side-load support. Retracted height is 7-1/4". Extended height is 22-5/8". Screw travel is 15-3/8". Drop leg offers an extra 13-3/4" of lift. Great Prices for the best trailer jack from etrailer. Square Jack w/ Footplate - Drop Leg - Bolt On - Zinc - Sidewind - 29-1/8" Lift - 2.5K part number MJSQ-2500B can be ordered online at or call 1-800-496-5010 for expert service.
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  • Reviews (562)
  • Q & A (0)
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  • Why etrailer?

etrailer Trailer Jack - MJSQ-2500B

  • Side Frame Mount Jack
  • 2001 - 3000 lbs
  • Sidewind Jack
  • Drop Leg
  • Bolt-On
  • Fixed Mount Jack
  • 29 Inch Lift
  • With Rectangle Foot
  • etrailer

Rust-resistant jack is great for marine use. Square design offers superior side-load support. Retracted height is 7-1/4". Extended height is 22-5/8". Screw travel is 15-3/8". Drop leg offers an extra 13-3/4" of lift.


  • Marine jack lets you raise and lower your boat or recreational trailer
  • Footplate minimizes sinking in soft ground
  • Sidewind handle has comfortable, grooved grip
  • Corrosion-resistant clear zinc finish for durability
    • 100-Hour salt spray rating
  • Effortless greasing with built-in grease zerk
  • Bolt-on installation to the side of your trailer
    • Mounting bracket is included


  • Application: trailers with a frame height from 2" to 5"
    • Trailer frame width must be no greater than 3"
  • Bracket height (from bottom of footplate to center of bracket):
    • 7-1/4" Retracted
    • 22-5/8" Extended
  • Total lift: 29-1/8"
    • Screw travel: 15-3/8"
    • Drop leg travel: 13-3/4"
  • Lift capacity: 2,500 lbs
  • Clearance: 17-1/2" from center of bracket to top of jack
  • Outer tube width: 2-1/4"
  • Inner tube width: 2"
  • Footplate dimensions: 7-1/2" long x 3-3/4" wide
  • Mounting bracket dimensions: 6-1/2" long x 6-1/2" wide
  • Handle radius: 7-7/8"
  • Adjustment hole spacing on drop leg: 3-3/8" from center of hole to center of hole
    • 3-1/2" Between center of hole on bottom and center of nearest hole
  • 1-Year warranty

Ram Dims

The rust-resistant, clear zinc finish protects against rust and corrosion caused by contact with water, making this the perfect jack for marine applications.

MJSQ-2500B Ram Square Swivel Marine Jack w/ Foot - Fixed Mount - Zinc - Side Wind - 15-3/8" Travel - 2,500 lbs

Customer Satisfaction Score:

Customer Reviews

Square Jack w/ Footplate - Drop Leg - Bolt On - Zinc - Sidewind - 29-1/8" Lift - 2.5K - MJSQ-2500B

Average Customer Rating:  4.8 out of 5 stars   (562 Customer Reviews)

Rust-resistant jack is great for marine use. Square design offers superior side-load support. Retracted height is 7-1/4". Extended height is 22-5/8". Screw travel is 15-3/8". Drop leg offers an extra 13-3/4" of lift.


Completely 100% satisfied with this flat bottom tongue jack. Works like a champ and is much safer than the Jack with the wheel that came on the trailer. Goes straight up and down and does not twist or bend like the original wheel bottom kaxl that came on the trailer.

After a year Jack still works like new. This is the only one I would buy as I’ve had several in the past with the wheel that were unstable and unsafe. Remember to grease the fitting on the standard at least once a year.
Mike O - 06/22/2022


I love it! I bought a used trailer for my 50 million pound pontoon ( OK, maybe 2500 lbs). The jack that came with it failed the fourth time I lifted it, and the tongue weight was so high that a concrete block I was using underneath shattered with the tongue resting on it. I replaced the broken concrete with a block of wood which is much better. The old jack also had a wheel which was utterly useless because of the trailer weight. This new jack installed easily and cranks smoothly and with almost no effort. Also has a grease zirc built in, but did not say how often to grease it. Very nice...........

Peachy keen. I am a happy dog
Nathan - 11/09/2019


Great jack! It was very easy to install and lifts high, fast and easy!
The customer service was above and beyond, helping me through the selection process and even found a more affordable option!


Jack is perfect for my boat trailer. It has the proper lift height to drain the deck water from boat compared to original trailer jack. It’s very sturdy and stable for this 25’ trailer. Great product.

Works well except the crank handle is very rusty and will need some sanding and paint.
Art - 07/20/2020


Excellent product and excellent experience with E-Trailer. It shipped out the day after I ordered it. I haven't installed them yet but it looks pretty staight forward.


Delivery as promised! Quality jack! Super easy to install. We had ordered the same jack from Autoplicity and they screwed up our order big time. We should have known better! Old jack with wheel was on bent frame and wouldn't stay straight! Thank u we are very happy!

Still great! We absolutley love it. Great quality.
Helen - 04/09/2020


My Square Jack / Ram Jack, lasted from April 2013 – about April 2019

I purchased a 2013 inshore Sundance DX22, the trailer came with a 2500 lb Ram Jack, that jack lasted till 2019 that’s around six years. I then came to to purchase a MJSQ-2500B Square Jack which is made by Ram Jack and is the same jack that came with my trailer.

my Ram jack was a 2013 (looked identical) to the etrailer Square jack that I ordered (see pics), the jack lasted till 2019 before the bottom rusted enough so that the shaft on the inside would not extend out or retract inward.

I live in Florida near the salt water, and launch in salt water all year round, so the jack does get salt spray and salt mist on it all the time, and sometimes the bottom of the jack is in the salt water, depending on the tide at the ramps.

Having had boats all my life, six years is a long time for a jack to last in salt water environment. Just to give you an idea of my saltwater environment, my Dodge Ram 3500 bumper and tail pipe rusted out before my jack did (see pics)

Not saying that this is normal or not, just that this was my experience with my Ram jack. Hope my new Ram jack lasts as long.

Pics show it mounted, I decided to spray some zinc galvanized paint on the bottom of the jack, just for a little added protection.,

As far as etrailer goes, from time to time I order parts from them, they never disappoint.

Thanks etrailer for my replacement Ram jack.


Good day,
This order was delivered about
6:30 pm. It was getting dark and had just rained. I helped the UPS driver with the single box. The box had split open from rain getting on it. All 4 jacks were loose. There were also 2 small screws and 1 washer on the floor of the UPS truck. These are the screws for the jack cover. 1 washer was not found, which I had a replacement for. The remaining small screws were loose.
I realize that you probably don’t get orders for 4 jacks at one time. But I would suggest no more than 2 per box. Also, perhaps use lock washers, loctite or tape around the cover mounting screws.
No further action is required on your part. Hope this helps you. I have a few pictures, but they won’t upload.

This sounds frustrating. We are always looking to improve our customers experiences. Customer service will contact you.
-- Etrailer Expert Sierra K - 10/04/2021


The Jack is fine except it takes too many cranks to raise/lower it. Would not buy again.


Bought this trailer jack a year ago and it is just what I wanted. Works well and wish I had purchased it a long time ago. Highly recommend it.


Great product. Seamless ordering and fast delivery.
Thank you etrailer.


This trailer jack is superb. Came exactly as described. Easy to install. Incredibly smooth action. Raises and lowers my 24 ft bay boat like it isn't even there.


Great square jack. Easy bolt on, smooth easy crank, adjustable height with the drop leg. Handles the tongue weight effortlessly. Has a grease fitting for lubrication. Fast easy bolt up install.


Great heavy duty jack, no signs of corrosion after a year of use, still works smoothly and is greaseable. It's used on a heavy triple axle boat trailer that's galvanized so its bolt on construction was convenient.


Very nice looking Jack with the zinc coating , looks like it came factory from Legend , but it didn't.


I used this for an unconventional application. It is clamped upside-down to the column of my floor drill press. This jack lets me raise and lower the heavy cast table of the drill press with a heavy cross slide fixture attached to it. No more back breaking and cursing when I need to adjust table height. I just had to drill 4 new holes in the mounting plate and use 4 clamp sections from 2 3/4" exhaust clamps with 5" 3/8 bolts to secure the jack to the drill press post. Simple modification made economical by

Still working GREAT! Uncommon application but it makes the drill press FAR more versatile! A little redneck engineering, but a big success!
Pete L - 07/04/2018


Product was properly represented and received in great condition.


Worked and fit perfectly. Nice and sturdy. Easy crank up and down and the drop leg is a god send considering how tall the old dunnage had to be.


Easy install and works great! I recommend this jack 100%

Still 100 pleased with the purchase
Tim - 03/06/2022


I bought this jack for a small, quirky dump trailer that didn’t have one. The bolt on brackets were simple to mount on one of the rails. The jack itself is rock solid. My only issue was that the package was shipped without the bolts or instructions. I made a call to their support line and resolved the problem quickly—I received the bolt package, instructions, and extra brackets within about 3 business days. It was a very good experience and I would definitely buy here again.


The jack is just what I needed for my boat trailer. It was easy to install and works great.


Needed a decent vertical jack for a unity trailer. Landed on this one. Appears to be well made, and arrived quickly. I called into etrailer customer service to help narrow down the choices. Over all experience was very good. I'll be back

Use the jack to stabilize a small utilize trailer. Works slick on the back end to keep the tail of the trailer leval when loading. Works good, and no signs of rust after a year... Appears to be a good value.
Jetwake C - 07/23/2020


Had it for a year now. Works great. Moves effortlessly on boat trailer with 21’ boat. The square foot is far more stable if you park on dirt


Sturdy, easy to install, and easy to operate. What more could you want in a trailer jack? I have purchased trailer hitches. bike racks, wiring harnesses, and now a trailer jack from a trailer. They have never let me down.


I purchased this tongue jack for my trailer last season. I trailer 4-6 days a week for 8months of the year. This product has exceeded my expectations in every way

It failed this spring. My toungue weight is 650 It was rated for 2500. Should be self explanitory
Rich B - 07/23/2018

Show More Reviews

See what our Experts say about this etrailer Trailer Jack

  • What is the Hole Spacing for etrailer Square Jack w/Drop Leg - Bolt On - Sidewind - 2.5K MJSQ-2500B
    The mounting holes on Square Jack w/ Footplate - Drop Leg - Bolt On - Zinc - Sidewind - 15-3/8" Travel - 2.5K Item # MJSQ-2500B are spaced 1" apart on center for the top 3 holes and bottom 3 holes. The 2 inner-most holes are spaced 1-1/2" apart on center. Side to side the holes are spaced 5-1/2 inches apart on center.
    view full answer...
    Image 1 for
  • What Does Square Jack Part # MJSQ-2500B Weigh
    The Square Jack Part # MJSQ-2500B that you referenced weighs 24 lbs.
    view full answer...
  • Salt Spray Rating of Square Trailer Jack
    The salt spray rating of jack # MJSQ-2500B is 100 hours.
    view full answer...
  • Handle Swing Radius of Square Jack w/ Footplate # MJSQ-2500B
    The Square Jack w/ Footplate # MJSQ-2500B referenced in your question features a handle radius from the center of where it mounts on the jack to the outer edge of the handle of 7-7/8 inches. This is a very nice sidewind jack that is designed specifically to mount to the side of the trailer like what you are wanting to do, so this will not be an issue. It is a simple bolt-on installation and the mounting bracket is included. It fits trailer frame heights of 2 to 5 inches and...
    view full answer...
    Image 1 for
  • Square Jack MJSQ-2500B Lift Without Drop Leg Extended
    Without the drop leg extended the Square Jack w/ Footplate part # MJSQ-2500B lift is 15-3/8". The total lift is 29-1/8" with the drop leg extended.
    view full answer...
  • Trailer Jack Recommendation for 3,000 lb Utility Trailer With 2-1/2" Tongue Width
    For your utility trailer with a 2-1/2" wide tongue I recommend checking out the Square Jack w/ Footplate # MJSQ-2500B. This jack has a 7-1/4" bracket height when it is retracted and extends to 22-5/8", giving you 15-3/8" of travel. It has a 2,500 lb lift capacity, which is more than enough for a 3,000 lb trailer since the jack only lifts a portion of the trailer's weight.
    view full answer...
  • What Size Bolts Come With the 2,500 Lb Marine Square Jack MJSQ-2500B
    The Square Jack with Footplate part # MJSQ-2500B comes with 3/8" hex head bolts. The bolt holes in the bracket will be just slightly larger than this but I do not have an exact measurement on this. If you want to use a larger bolt then you would need to re-drill the bolt holes but I do not recommend this.
    view full answer...
  • Recommendation For Replacement Trailer Jack For Four Winns Boat Trailer
    A solid replacement jack that I recommend is the Square Jack w/Footplate-Bolt On, Item # MJSQ-2500B. This item is a great marine jack that has a rust-resistant zinc finish and that is built to be flexible and durable. It has a lift capacity of 2,500-lbs, fits a frame height from 2 inches to 5 inches, and has a comfortable, grooved grip handle. If this will not work for you, send me some more information like weight capacity needed, mounting bracket dimensions, pictures, etc. and I will...
    view full answer...
  • Position of Foot Plate on Square Jack w/Foot Plate # MJSQ-2500B
    The foot plate of the Square Jack w/ Footplate # MJSQ-2500B that you referenced can attach to the jack in either orientation. You can have the foot plate longways so that it's parallel with the direction of travel or perpendicular. I would agree that parallel like you mentioned would seem more logical since rolling forward or back would be more likely where you'd want the support.
    view full answer...
  • Recommended Swivel Jack For Small 4 ft x 7 ft Utility Trailer
    I recommend a swivel jack like part # DL22457. This has a 1,000 lb capacity and will fit trailer tongues up to 3 inch x 5 inches. This is a sidewind jack and it also has a 6 inch wheel included. This jack should have no problem with the weight of the trailer with a riding mower.
    view full answer...
  • Recommended Drop Leg Jack for 3 Inch x 5 Inch Trailer Frame
    The Square Jack w/ Footplate part # MJSQ-2500B will work with trailer frames 3" wide x 5" tall and has a zinc finish so it will resist corrosion just like your galvanized trailer frame. The mounting bracket on the jack is at the very bottom of the outer tube so you don't have to worry about a swing-away but we do have the Fulton F2 Swing-Up Jack part # F1413230134 if you want a swing-away feature though you will pay more for this. I am not entirely sure what type of jack you are looking...
    view full answer...
  • Recommended Side-Mount Trailer Jack for Camper Trailer to Improve Tailgate Clearance
    I understand your tailgate clearance need but I do not recommend going without a tongue jack on your camper trailer. What you might do instead, to both improve your tailgate clearance and retain the safety and utility of a trailer tongue jack, is install a different type of jack, a side-fame-mount type, in place of the A-frame tongue jack. The stabilizer jacks on your camper are designed to support weight but would not take kindly to the bumps they might receive as you back your tow vehicle...
    view full answer...
  • Similar Version of etrailer Side Mount Jack with at Swivel and Wheel Caster
    The jack part # MJSQ-2500B is made by RAM jacks like the jack you have now. The most similar swivel jack with a wheel caster would be the part # MJ-1200B which has a 1,200 lb capacity, a wheel like you want, and swivels like you want it to as well.
    view full answer...
  • Will a Taller Drop Leg Fit Fulton 2.5K Square Fixed-Mount Marine Jack FHD2500
    Fulton Square Drop Leg for Stabilizer Jack, 29" Long Item # FSJ20324 by itself will be 24-3/4 inches tall from where it attaches to the jack to the bottom of the foot with the drop leg in the tallest position. It is essentially more than doubling the lift amount of Fulton Square, Fixed-Mount Marine Jack - Drop Leg - Sidewind - 2,500 lbs Item # FHD2500. However, because the drop link is so tall it will not be able to retract all the way into the jack leg it is attached to so keep that in...
    view full answer...
  • Will Replacement Drop Leg for etrailer and Ram Square Direct Weld Jacks Fit Jack # MJSQ-2500B
    Yes, drop leg # TJD-5000-FT will fit trailer jack # MJSQ-2500B. The drop leg that comes with this jack is 1-3/4 inches square which is the same as # TJD-5000-FT. And it has the same hole spacing.
    view full answer...
  • Replacement Trailer jack for Ludo Dump Trailer
    We don't have a repair kit for that jack. Since it sounds like the screw is damaged and the handle is already broke it's time for a new jack. The etrailer jack part # MJSQ-2500B would be a great replacement for this.
    view full answer...
    Image 1 for
  • Spring Loaded Quick Pin Compatibility with Square Jack Drop Leg
    The Replacement Snapper Pin for Ram Jack Footplates, Casters, and Couplers # JFC-PN similar to what you find on trailer jacks like the Square Jack w/ Footplate - Drop Leg # MJSQ-2500B you mentioned is 3/8 inches diameter and about 2-3/4 inches long. The Ultra-Fab Spring-Loaded Quick Pins for Landing Gear Drop Legs - 3/8" Diameter - Qty 2 # UF17-943031 will work well on this application.
    view full answer...
  • What Replacement Drop Leg Will Fit My RAM 2500 Trailer Jack
    We do offer replacement legs for RAM 2500 trailer jacks. For example, if you have the Square Jack w/ Footplate - Drop Leg - Bolt On - Zinc - Sidewind - 29-1/8" Lift - 2.5K, part # MJSQ-2500B, your replacement jack leg would be the Replacement Drop Leg for etrailer and Ram Square Direct Weld Jacks - 3K, part # TJD-5000-FT. The travel of the drop leg is 13 1/2" and it has a pinhole diameter of 5/8". If you do not have the etrailer jack, but your RAM 2500 series trailer jack accepts 1.71"...
    view full answer...
  • Mounting Hole Size for A-Frame Trailer Jacks
    The mounting hole dimensions of A-frame jacks are a standard 3 inches apart on center, so you will need to weld your new jack on. I highly recommend the Bulldog Round, A-Frame Jack # BD1700100317, which has a 5,000 lb capacity and will give you 15" of lift. It has an outer tube diameter of 2-1/4" and sidewind handle; for a footplate you would want # BD018564. This jack has been highly praised by our customers, with nearly 200 reviews it has an average close to 5 out of 5 stars. I've added...
    view full answer...
    Image 1 for
  • Drop-Leg A-Frame Jack for 4500-lb Travel Trailer
    The 2500-lb-rated Square Jack # MJSQ-2500B certainly has enough capacity to lift the 600-lb tongue weight (TW) of a 4500-lb travel trailer although this particular jack is primarily intended for marine trailer applications. This jack's included bracket mounts to the side of a trailer frame that measures up to 3-inches wide and between 2- and 5-inches tall. Since your travel trailer is an a-frame you might consider a comparably-rated a-frame jack like the 3000-lb-rated Bulldog # BD1550100317...
    view full answer...
  • Trailer Jack to Avoid Tailgate Clearance Issues
    There are a few solutions for your tailgate to clear the jack on your trailer. I recommend to use a longer ball mount like # D-26, that would move the trailer back further away from the truck and give you clearance you need. If you know what size the hitch on your vehicle is, the rise or drop of the ball mount for your trailer, if you're using weight distribution or not, and the measurement from the center of the hitch pin hole to the center of the ball hole I can make the best recommendation...
    view full answer...
    Image 1 for Image 2 for
  • etrailer Square Jack w/ Footplate to Replace Ram Side Wind Jack
    Thanks for the pictures! It looks like you have a Ram side wind jack and we do sell replacement parts for it. The jack you were looking at would be a great replacement for it if these parts do are not what you are looking for. The etrailer Square Jack w/ Footplate item # MJSQ-2500B is a bolt on, drop leg, sidewind jack. It has a 29-1/8" Lift and like your Ram jack is rated for 2,500 lbs. The rust-resistant, clear zinc finish protects against rust and corrosion caused by contact with water,...
    view full answer...
    Image 1 for Image 2 for

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