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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
Our Price: $73.27
Trailer Jack
Shipping Weight: 15 lbs
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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. Great 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 1-800-940-8924 for expert service.
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  • Reviews (761)
  • Q & A (0)
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etrailer Trailer Jack - MJ-1200B

  • Boat Trailer
  • 1001 - 2000 lbs
  • Sidewind Jack
  • Swivel Jack
  • Bolt-On
  • Leveling Jacks
  • Tongue Jacks
  • 11 Inch Lift
  • With Wheel
  • Steel
  • 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 Satisfaction Score:

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   (759 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.


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...


So this boat trailer had an Atwood jack and the mounting bracket was actually welded on the frame. Got lucky as the round hole after removing all the mounting hardware fit on the welded bracket. Had to drill out catch holes but all is well!


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!


Ordered this trailer jack for a small 8x10 cargo trailer/camper. Fits perfectly, solid build and is exactly what we were looking for. Great customer support from Etrailer with this order. Thank you!!


Haven't used it yet, but seems solid!



The hitch receiver has been great for my application. DIY installation was easier than expected! Quality is holding up well! Recommend!

Etrailer Expert

Mike L.


@Luke That's great to hear, thank you!


Great replacement fo the stock jack


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


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


The swivel jack w/wheel was exactly what I was looking is being used on my ATV wagon...the swivel jack has a large wheel for easy maneuverability...large load capability...


Worked as advertised


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.


i use e trailer for all my trailer and camper needs. i always receive great service and they provide quality parts. thanks e trailer!!



Just what I needed.Easy to install. Sara wasc very helpful.


Great customer service


just what we needed and at a really good price.


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!!!

Craig B.


Jack is working great. Make about 30 trips to the lake this year. Great product!!


Inexpensive but perfect for kayak trailer. E trailer shopping, shipping and service is best in class.


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.

Kevin L.


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.


The unit works great. The galvanized finishing is even & a great weather barrier from the harsh elements.


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 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.


Great stuff at a great price, I have 8 trailers and this is the only place to shop


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


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.


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....

Show More Reviews

See what our Experts say about this etrailer Trailer Jack

  • Overall Height of the Round Swivel Marine Jack w/ Wheel # MJ-1200B
    The overall height of the Round Swivel Marine Jack w/ Wheel # MJ-1200B is 22-3/8 inches when fully retracted. It can swivel forward or back too.
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  • Grease Port Location For Ram Jack MJ-1200B
    Actually the hole that you see under the handle on the Ram Jack part # MJ-1200B is the port for lubricating the jack. Sometimes there is a zerk fitting there but for your jack it's just an opening. You would want to spray a lithium grease into that hole to keep the parts lubricated. Or you can remove the cap and spray down into the main tube of the jack that way as well.
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  • Trailer Jack to Replace 1200-lb-Rated Shelby 5791
    The linked page displays all of our 1200-lb-rated trailer jacks. All of these are side-wind types and they range in their amount of lift, most providing 10-inches of lift. We also have both weld-on and bolt-on types. You can click on the filters on the page to narrow the items shown to those with the characteristics you prefer. For instance, for a great-value zinc-plated jack with wheel that mounts to the side of the trailer frame the etrailer jack # MJ-1200B is a perfect option. This...
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  • Replacement Side-Frame-Mount Swivel Jack for 1992 StarCraft A-Frame Pop-Up Camper Trailer
    We can help you with a new jack for your 1992 StarCraft pop-up camper. Usually an A-frame trailer like this will use a jack that mounts in the standard receptacle behind the coupler. Jacks for this kind of A-frame installation are linked for you. We have manual and electric types, top-wind and side-wind types, bolt-on and weld-on models and you can choose either a wheel or footplate. But sometimes a jack in this location can pose clearance issues with other trailer-mounted items or with...
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  • 1,200 lb Swivel Jack Recommendation with Wheel Caster
    I believe the jack you are looking for a replacement for is a frame mounted, swivel jack, sidewind, that has a 1,200 lb capacity and a wheel caster. The part # MJ-1200B would be a great option that fits all of that criteria.
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  • Weight of Round Swivel Marine Jack # MJ-1200B
    The Round Swivel Marine Jack w/ Wheel # MJ-1200B referenced in your question weighs just around 15 pounds. This is a nice, corrosion-resistant swivel jack that features 11 inches of travel and a 1,200 pound lift capacity. The mounting bracket and hardware are included, along with the 5-3/4 inch wheel. I have attached a couple short video demonstrations on this swivel jack that you can also take a look at.
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  • Comparison of Two Round Swivel Marine Trailer Jacks
    The two swivel trailer jacks are very similar. The differences are the # MJ-1206B is rated for 1,000 pounds and has 10 inches of travel where the # MJ-1200B is a slight upgrade rated at 1,200 pounds and 11 inches of travel. I've linked videos to each of the jacks for you.
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  • Recommended Trailer Jack with Lower Retracted Height for Landscaping Trailer
    I looked through our selection trying to find a similar jack to the MaxxTow MT70149 with a retracted height less than 14-3/4 inches and found a couple of good options for you. You didn't say exactly what height you need, however part # MJ-1200B has a retracted height of 12-1/2 inches. The weight capacity is slightly less, at 1,200 pounds but that's probably still plenty for your trailer. It also offers 11 inches of travel which is a 1/2 inch less than the MaxxTow. A second option is...
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  • 1200 Ram Trailer Jack Sidewind Handle Replacement
    Yes you can use the replacement handle # MJ-1000B-HD with the 1,200 lb Ram jack # MJ-1200B.
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  • Swivel Jack for a Heritage Boat Trailer with a 4,000-4,500 lb. Boat
    For your Heritage boat trailer with 4,000-4,500 lb. boat you can use the Round Swivel Marine Jack w/ Wheel # MJ-1200B. This swivel jack will provide you with 11" of travel and a 1,200 lb. capacity. The capacity is factored by the tongue weight, so the 1,200 lb. capacity will be more than enough for your boat trailer. This jack features a bolt-on installation with the included mounting bracket and hardware.
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  • 1995 Freedom Wheels Cobalt 220 Runabout Replacement Trailer Jack Recommendation
    Thank you for the photos! While it doesn't look like we have anything that mounts directly to your current mounting bracket, we do have some bolt-on replacement swivel jacks that will work perfectly for your application. For a single wheel replacement I recommend the Round Swivel Marine Jack w/ Wheel # MJ-1200B with 11" of travel and a 1,200 lb weight capacity, or for a dual wheel jack (for easy maneuverability) we have the Round Swivel Marine Jack w/ Dual Wheel # MJ-1500B-DWL which has...
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  • Replacement for Ultra-Tow Marine Boat Trailer Side Mount Jack
    I do have an option for you but we don't carry "Ultra-Tow" therefore would not have the replacement stem and handle you're inquiring about. That said, the jack looks to be a bit dated so to save you the hassle of looking for replacement parts for a jack they likely don't even make anymore, I am going to offer you a full replacement option in the Round Swivel Marine Jack with Wheel part # MJ-1200B. This jack features a bolt-on install and wheel for easier maneuverability. It has a 1,200...
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  • Replacement Swivel Jack with Lowest Possible Retracted Height for Use on Small Utility Trailer
    I was able to find a swivel jack option for you that has a retracted height of 11 inches from the bottom of the wheel to the center of the mounting bracket, but none of the trailer jacks with a caster that we offer have a retracted height of 10 inches or less. The jack that may work best for you is the Fulton F2 Trailer Jack, like # F1413040134. This jack has an adjustable mounting bracket with the lowest retracted height being 11 inches. The lift height of the jack is 10 inches, and...
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    I am not aware of any such trailer jack that we offer which will reuse your existing mounting bracket as they are typically brand specific, not universal. Therefore, this bracket will need to be removed, usually by cutting, and then replaced with a bolt-on option such as the Round Swivel Marine Jack w/ Wheel part # MJ-1200B which is a great cost effective replacement option for this.
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  • Replacement Jack for Boat Trailer with Snap-Ring Mounting Bracket
    The best option to install a new trailer jack on a boat trailer with existing snap-ring mounting bracket would be to go with a bolt-on option, the Round Swivel Marine Jack part # MJ-1200B. I know you want to try and reuse the existing mounting bracket but the fact of the matter is that these snap-ring mounting brackets are not universal (different sizes) and most of the older options are not available anymore.
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  • Replacement for Shelby Trailer Jack on Four Winns Boat Trailer
    I do have an option for you but Shelby boat trailer jacks are discontinued and we don't offer any direct bolt-on replacements for them. That said, you can easily remove the old flange by cutting or simply place the new jack beside it and leave the old flange in place. I recommend the Round Swivel Marine Jack w/ Wheel part # MJ-1200B which offers a bolt-on install with wheel for easier maneuvering.
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  • 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.
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  • Replacement Parts for etrailer or RAM 1,200 lbs Round Swivel Marine Jack w/ Wheel
    For your RAM Jack # MJ-1200B, you can replace the crank handle with part # MJ-1000B-HD and the top cap with part # MJ-1000B-CP. The handle side bushing is not currently available as a replacement part.
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  • Replacement Jack For Older Fulton Without a Jack Model Number and Damaged Side Wind Handle
    Without knowing an exact model number for your jack there is no way to ensure the correct replacement parts. I recommend replacing your jack with our Round Swivel Marine Jack w/ Wheel # MJ-1200B. This is an affordable jack which we offer several replacement parts including a Handle # MJ-1000B-HD.
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    The Fulton Bolt-Thru Swivel Marine Jack - Weld On - Sidewind - 10" Lift - 1,500 lbs # FXP15W. This jack is 12-3/4 inches retracted and has a clearance of 12-1/2 inches from mounting bracket to top of jack. This will be the closest jack to fitting your needs. If you don't need the bolt thru style, I recommend the Round Swivel Marine Jack w/ Wheel - Bolt On - Zinc - Sidewind - 11" Travel - 1,200 lbs # MJ-1200B which is bolt on and has the 12-1/2 inch retracted length. Unfortunately there...
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  • Recommended Light Duty Trailer Jack for 2-1/2 Inch Tongue
    For your light duty jack I recommend the Round Swivel Marine Jack w/ Wheel - Bolt On - Zinc - Sidewind - 11" Travel - 1,200 lbs # MJ-1200B. For your 2-1/2 inch tongue, you will need to drill additional holes in the mounting brackets to center the swivel portion of the jack, but it will work very well for your application and give you a precise fit.
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  • Replacement Jack Handle for Ram Jack with 1,200 lb Capacity
    Sounds like the jack that you have is the Round Swivel Marine Jack w/ Wheel # MJ-1200B which is a sidewind Ram Jack with a 1,200 lb capacity. So then the correct handle you'd need is the # MJ-1000B-HD.
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  • How Do Bolt-On Round Swivel Marine Jacks Mount to Trailer
    The Mounting Kit # MJ-1000B-MK is a replacement part for the Round Swivel Marine Jacks # MJ-1200B and # MJ-1500B which actually mounts to the side of the frame of your trailer instead of in the hole location in your A-Frame coupler area. As long as your trailer frame is 2" to 4" tall this bracket system will work for you. If you're needing a different style that mounts in an A-Frame I recommend either the manual # TJA-5000S-B or electric # EJ-3527-BBX. These have a 2-1/4" outer diameter...
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Info for this part was:

Employee Jameson C
Expert Research:
Jameson C
Employee Adam R
Expert Research:
Adam R
Employee Jacob T
Video Edited:
Jacob T
Employee Dustin K
Video by:
Dustin K
Employee Cole B
Installed by:
Cole B
Employee Hayden R
Installed by:
Hayden R
Employee Wilson B
Updated by:
Wilson B
Employee Ronnie R
Updated by:
Ronnie R
Employee Mike S
Updated by:
Mike S
Employee Amanda M
Written by:
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