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Round Swivel Marine Jack w/ Wheel - Bolt On - Zinc - Sidewind - 11" Travel - 1,200 lbs

Round Swivel Marine Jack w/ Wheel - Bolt On - Zinc - Sidewind - 11" Travel - 1,200 lbs

Item # MJ-1200B
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Corrosion-resistant, clear zinc swivel jack with 5-3/4" wheel is perfect for marine use as well as other recreational applications. Jack has an extended height of 23-1/2", a retracted height of 12-1/2", and a capacity of 1,200 lbs. Lowest Prices for the best trailer jack from etrailer. Round Swivel Marine Jack w/ Wheel - Bolt On - Zinc - Sidewind - 11" Travel - 1,200 lbs part number MJ-1200B can be ordered online at or call 1-636-306-4830 for expert service.
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  • Reviews (492)
  • Q & A (0)
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etrailer Trailer Jack - MJ-1200B

  • Boat Trailer Jack
  • Side Frame Mount Jack
  • 1001 - 2000 lbs
  • Sidewind Jack
  • No Drop Leg
  • Bolt-On
  • Swivel Jack - Pull Pin
  • 11 Inch Lift
  • With Wheel
  • etrailer

Corrosion-resistant, clear zinc swivel jack with 5-3/4" wheel is perfect for marine use as well as other recreational applications. Jack has an extended height of 23-1/2", a retracted height of 12-1/2", and a capacity of 1,200 lbs.


  • Marine jack lets you raise and lower your boat or recreational trailer
  • Swivel design lets you swing jack up for storage, down for use
    • 4-Bolt mounting plate provides extra side load support
    • Convenient 1/2", spring-loaded pull pin secures and releases jack
  • Plastic wheel lets you easily move your trailer
    • Inner tube rotates with wheel allowing you to move in any direction
  • Sidewind handle has comfortable, grooved grip
  • Corrosion-resistant clear zinc finish for durability
  • Bolt-on installation to the side of your trailer
    • Mounting bracket and hardware included


  • Application: trailers with a frame height from 2" to 4"
  • Bracket height (from bottom of wheel to center of bracket):
    • 12-1/2" Retracted
    • 23-1/2" Extended
  • Travel: 11"
  • Outer tube diameter: 2"
  • Inner tube diameter: 1-3/4"
  • Wheel dimensions: 5-3/4" diameter x 2" wide
  • Mounting bracket dimensions: 6-7/8" long x 5-3/4" wide
  • Bolt dimensions: 3-15/16" long from bottom of the bolt head to the end of the threads
    • 2" From bottom of the bolt head to the first thread
  • Handle radius: 6-5/8"
  • Lift capacity: 1,200 lbs
  • 1-Year warranty


MJ-1200B Ram Round Swivel Marine Jack - Bolt On - Zinc - Side Wind - 11" Travel - 1,200 lbs

Customer Reviews

Round Swivel Marine Jack w/ Wheel - Bolt On - Zinc - Sidewind - 11" Travel - 1,200 lbs - MJ-1200B

Average Customer Rating:  4.8 out of 5 stars   (492 Customer Reviews)

Corrosion-resistant, clear zinc swivel jack with 5-3/4" wheel is perfect for marine use as well as other recreational applications. Jack has an extended height of 23-1/2", a retracted height of 12-1/2", and a capacity of 1,200 lbs.


Easy to install. Makes hitching up so much easier, especially on the back. Works great.

Works great, looks like new. Makes hitching up a breeze.
Stephen - 04/16/2022


Very nice! Very easy to install. I never thought it would be so easy to reposition my boat in the garage. Moves so smoothly raising/lowering my trailer on/off my hitch. My only wish is that I would have replaced my old jack sooner! I highly recommend this wheel jack...


As always the quality is very good! I did have problems getting the led lights at the advertised sale price! Took 3 emails and 2 phone calls!!! I ordered the tail lights at 24 % off. At checkout it didn’t show the sale price. I contacted customer service and was told the price would be adjust at check out. That didn’t happen! So another call. Had to explain the situation again. Finally got it resolved a couple of days later!


I purchased my Mj-1200B trailer jack last year for my DJ equipment trailer. The quality is great and more heavy duty than I probably need for a small 4x6' trailer but I couldn't be without it. No issues what so ever and so I'm very happy with the purchase!


This Jack is the perfect fit for any trailer and makes it so much easier to move around on smooth surfaces.


Product arrived on time with no issues. Well made no complaints.


Got it installed. Could have used a 2nd pair of hands however it appears like it will solve the issue of having to lift the trailer up. Very happy with it


I bought this swivel jack for a utility trailer. It appears very well made and works well. Excellent value.

Have used it for a year. Still like new!
Dave L - 04/21/2018


The trailer seems perfect for my 12 foot Jackson Mayfly sit on top kayak. The trailer was shipped promptly in 5 boxes, all the parts were there. Instructions on how to assemble the trailer were excellent. Very happy with my purchase. I did add 2 wooden upright guides to keep the kayak centered on the trailer going down the road.


Mounts and attached with ease. Works perfect before and a year later.


Had a hard time finding a trailer jack for my boat. It was unique and did not what to place jack in a different place on the trailer frame. I sent in photos of what I had. Within in a day I had a response with the correct jack and they shipped it that day. Got it 2 days later installed at the lake today, it works perfect. These guys and gals know there stuff. Excellent customer service!!!

Jack is working great. Make about 30 trips to the lake this year. Great product!!
Craig B - 10/11/2018


These are working so much better than the support legs that came with my pop-up.
I mounted two on the back bumper and have one on the tongue, I can level my trailor upon set-up in minutes, or can jack the trailor and change a tire in minutes.....
Great Product Wonderful Price....


Not the first swivel jack and wheel from eTrailer. Easy to install, high quality product for the money.


I wanted the ability to detach from my utility trailer while it was loaded. My KIA Soul's receiver was close to the road so required a swivel jack with a very low retracted position. Was looking for something in the 10.5" range. This Jack had the lowest advertised height of 12.5" to the center line of the tounge tube. It occurred to me that the 12.5" was derived from the pivot point assuming a 4" tounge and mine was a 3". This gained me .5" towards my goal. I also discovered that if I mounted the bracket upside down from the instructions I would gain an inch more. This, combined with a higher rise ball mount worked out great. I'm very satisfied with this product.


This jack works great. It is so much easier to use than my old one.
I can recommend it.


Work great for me, you should advertise that it may fit your
Old jack mounting plate, (welded on) just remove your bracket, and fits
Mine with a, c clamp.


The jack I ordered was a well made product, great price and was shipped right away.


I attached this to my Casita Trailer and removed the factory installed one so that I could use my tailgate without hitting it on the hitch. Worked like a dream and was able to install with ease in 5 minutes.

Still very happy. I wish the wheel was detachable and a foot could be installed. Sometimes the wheel is a bit too tall for unhooking from my Tacoma.
Kevin L - 06/27/2018


I've had this tongue jack for about a year now. There's VERY little sign of rust after being exposed to the salt air and the jack still works as new. What killed the last one was the lock pin for the swivel action was not holding properly. The swivel plates, lock pin and lock pin spring are still in excellent shape on this unit.


Just installed the jack today so no real use yet. I replaced the tongue jack that came with the trailer (non folding type that's in the way of opening my tailgate). I did have to get different bolts because the ones supplied where to long for my trailer tongue (3"x1.5" channel). No big deal as I had some in my garage bolt stash. Product seems well made and works as hoped for.


Very well made, easy to install. I really love the product videos. They are a big help in choosing the right product. I stopped even looking anyplace else. I've learned alway has the best product at the best price. And the service is great.


Excellent product. Well built. Excellent service.


Took a bit of wrangling to get the jack on the trailer tongue, but only b/c I didn't have another set of hands to help. It took me ~20 min to put it on. I realize now that my trailer is back heavy, I need to attach a scissors jack to help it remain stable. Even so the wheel allows me to maneuver it around and already a great addition.


Several positive items come to mind. First, I was impressed with the extensive alternative items available - it almost made the choice difficult - too much variety in what was available. But a lot of information and reviews helped with selection. In the end price and ratings were most helpful.There was a wide range of prices and I choose the least expensive but it seems to be well constructed and plenty adequate for the job.

Second, I wasn't expecting but enjoyed that after ordering my shipping was upgraded. I had ordered Sunday and the item was delivered Wednesday. And in a box that had handles so it was easy to move around. And packed in recyclable materials.

Attaching the swivel trailer jack was simple and easy and required no instructions. Only took 15 minutes and most of that time was finding my tools. I haven't used it yet but it should work fine. And now I'll be able to move my trailer and kayaks much more easily.


Package somehow got routed wrong by UPS, but got here anyway.
All product in great shape. I woulld suggest new bolts with the hitch couplers when shipping. Having to go looking for bolts on a Sunday or late at night is a pain in the butt.

But great products nonetheless!

Show More Reviews

See what our Experts say about this etrailer Trailer Jack

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