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  5. Sidewind Jack
  6. No Drop Leg
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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Round Swivel Marine Jack w/ Wheel - Bolt On - Zinc - Sidewind - 11" Travel - 1,200 lbs 11 Inch Lift 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 etrailer.com or call 800-298-8924 for expert service.
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  • Reviews (90)
  • Q & A (21)
  • Videos (2)
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  • Why etrailer?

etrailer Trailer Jack - MJ-1200B

  • Side Frame Mount Jack
  • 1200 lbs
  • Sidewind Jack
  • No Drop Leg
  • etrailer
  • Swivel Jack - Pull Pin
  • Bolt-On
  • 11 Inch Lift
  • With Wheel

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

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

Videos are provided as a guide only. Refer to manufacturer installation instructions and specs for complete information.

Video Transcript for etrailer Trailer Jack - Side Frame Mount Jack - MJ-1200B Review

Today we'll going to be taking a look at a round swivel marine jack with an included wheel. This marine jack is going to let you raise and lower your boat, or recreational trailer. It's going to have a lift capacity of 1200 pounds and its going to feature a swivel design. That way you can swing the jack up a long your trailer frame for storage, or you can bring it back down when you're ready to use it. It's going to feature a 4-bolt mounting option. That's going to provide extra side load support, your mounting hardware, and the brackets to get this bolted onto the frame of your trailer, as well as the mounting plate. That's all included.

Now, real quick, I just want to show that swivel design. It's a really neat feature and it's really easy to use. So the way that it works, is you're going to have this 1/2 inch convenient spring-loaded pull pin. This is going to be disengaged in order to rotate the jack either up or down. this plate is going to mount on one side of your trailer frame. The brackets are going to mount on the other side of your trailer frame.

So your frame is going to be in between and those 2 components are going to be held together with the included bolts and lock nuts. If this is fixed or mounted to your trailer frame, you can pull the pin and you can see how the mounting plate and the jack move independently from one another. There's going to be 4 holes that that pin can be engaged in. So you can really have the jack situated how you want along your trailer frame. It's a really nice design and again just that option to be able to move that up to a stowed position when it's not being used or when you're in travel, is a really great benefit. The jack also comes with the plastic wheel.

This is included and this is going to be welded to the bottom of the inner tube. Now, the wheel itself is actually bolted to the wheel mount, and then the wheel mount is welded to the bottom of the inner tube. I do want to mention that this wheel, it does spin around, but since it is attached to the bottom of the inner tube that inner tube is going to spin along with it. But it's still a nice design. It's going to give you the maneuverability that you need, especially when trying to get your trailer into some of those tough areas.

This is going to allow you to really change the angle and get it to where you need it. It's a really nice design. Right here you're going to have a really nice fluid, side-wind handle. It's got a nice comfortable grip. It's got a textured grip, so you can easily get a good grip on it when you're raising and lowering the jack. That's going to give us a handle radius measuring from the center of where it mounts to the outer edge of the hand grip of 6 5/8 of an inch. Now, the components of the jack, the main components, the outer tube, inner tube, mount right here for the wheel, and for the trailer, that's going to be steel construction. As well as the pull pin. There's a lot of steel on here. Now to make sure that it doesn't rust and corrode what they've done is they've put a really nice corrosion resistant clear zinc finish on it. This is going to be ideal for marine applications. Another measurement I want to mention is going to be our bracket height. With the jack as low as it'll go, fully retracted, I took a measurement from the bottom of the wheel to the center of the bracket and that measured 12 1/2 inches. I did that same measurement with the jack fully extended and that increased it to 23 1/2 inches. This jack is going to give us a travel or a lift of 11 inches. The outer tube is going to give us a diameter of 2 inches. The inner tube is going to give us a diameter of 1 3/4 of an inch. The wheel, that's going to give us a diameter of 5 3/4 of an inch. It's going to give us a width measurement, outside edge to outside edge of right at 2 inches wide. Now, that's a really nice thick plastic construction. It's going to last a long time. You can see that it's not a spoke design, so that's solid all the way through. Really a lot of support, and it's got the support braces in there as well. The wheel is going to be a strong, and durable design. hen it comes to the mounting bracket, this is going to give us an overall length measurement of 6 7/8 of an inch. Overall height measurement, that's going to give us a measurement of 5 3/4 of an inch. The distance between the mount holes going across looks to be pretty close to 5 1/2 inches, and then going up and down, from the center of this hole to the center of this hole, we're looking at 2 7/16 of an inch. Center of this hole to the center of that middle hole, that's going to be 3 7/16 of an inch. Center of this hole to the center of that outer hole is going to be 4 7/16 of an inch. And again your brackets and your hardware is included for and easier bolt on installation of this round swivel marine jack. That's going to complete today's look at the round swivel marine jack with a lift capacity of 1200 pounds.

Customer Reviews

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

Average Customer Rating:  4.9 out of 5 stars   (90 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.

- MJ-1200B

lady that worked with me was great and product was just what I needed. 667698

- MJ-1200B

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... 548415

- MJ-1200B

Great product, i would by another one. Thanks 506561

- MJ-1200B

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. 575753

- MJ-1200B

This Jack is the perfect fit for any trailer and makes it so much easier to move around on smooth surfaces. 617951

- MJ-1200B

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.... 571968

- MJ-1200B

Bought and installed on my 4’x8’ trailer. Basically bought do I didn’t have to pick up my trailer and pull it around to move it because of my bad back. Trailer jack is larger than I thought it would be but it was ok, worked out great. I like the large wheel, now I can push it around and unhook if the trailer is still loaded. Great purchase. Recommended product 578552

- MJ-1200B

I bought this swivel jack for a utility trailer. It appears very well made and works well. Excellent value. 370342

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


- MJ-1200B

As ordered 737282

- MJ-1200B

This jack arrived quickly and fit Perfectly! Works great. 723094

- MJ-1200B

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. 720092

- MJ-1200B

Does the job, and looks good. 713925

- MJ-1200B

Arrived as ordered. Well packed and arrived in 2 days! 711314

- MJ-1200B

Been over a year and it is still working good. We use it daily. 707246

- MJ-1200B

Package arrived on time and was packaged well with no damage. Thanks for the prompt service. 696446

- MJ-1200B

Always great products. Great people too talk to before ordering parts, making sure it will work on project. Customer service is top notch. 697022

- MJ-1200B

looks good and ready to go. 692943

- MJ-1200B

Product was easy to install in about 10 minutes. Operates smooth. Used on a boat trailer. 679088

- MJ-1200B

Wow! Other e-commerce businesses could learn from you. Your product is excellent, very affordable and delivered when you said it would be. On top of that installation was super easy. Thank you! You even made it easy for a novice. Sincerely with gratitude! Dan Stevens 678020

- MJ-1200B

Great 675394

- MJ-1200B

Excellent product. Installed it on my Karavan trailer, and it works great. Problem it solved for me , was allowing me to completely lower my truck tail gate down. Very good quality product and was easy to install. Etrailer does a superb job , in customer relations , and a excellent job in processing your order , and expediting it for shipment. 663291

- MJ-1200B

Product didn't fit but that's on me. Nothing wrong with the product or etrailer's description just me not paying attention enough. 648040

- MJ-1200B

I've been very happy with this purchase. It's much sturdier than the unit I replaced it with which was appreciated. It has held up well over the year I've had it and expect many more years of effortless service. 647606

- MJ-1200B

The trailer jack arrived quickly and as expected from previous experience was of great quality It was easy to install and works great 644347

- MJ-1200B

Good service and fast delivery 640424

Show More Reviews

Ask the Experts about this etrailer Trailer Jack

  • Replacement for Shelby 5764A Trailer Jack on 2000 Four Winns Horizon 180
    Swapping the mounting hardware on a jack can be done, but it will depend on the specific mounting hardware of the jacks. Shelby jacks and parts are becoming more difficult to locate, so I would recommend replacing your Shelby hardware with something more easily replaceable in the future like the etrailer Marine Jack # MJ-1200B, which has a 1200 lb capacity and 11" lift. If you want to try to match the existing Shelby mounting plate, we do have one jack that may work. The Fulton Bolt-Thru...
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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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  • 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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  • 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.
    view full answer...
  • Weight of etrailer.com Round Swivel Marine Jack # MJ-1200B
    The etrailer.com 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.
    view full answer...
  • Recommended Trailer Jack Compatible with Welding to Trailer Frame
    The Round Swivel Marine Jack w/ Wheel - Bolt On # MJ-1200B can be welded to your trailer if you so desire. You will compromise the corrosion resistant zinc finish by doing so instead of using the included mounting brackets and hardware. I recommend painting the weld to protect the metal if you choose to install in that manner. For a better alternative, I recommend the Fulton Round Snap-Ring Swivel Marine Jack - Weld On # FTJ120W0301. It will give you the mount intended for that weld-on...
    view full answer...
  • 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.
    view full answer...
  • 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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  • 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...
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  • How To Add Tongue Weight To a Small Motorcycle Trailer
    The issue you are having with excess sway is pretty common on light trailers. The sway issue might then be minimized when you have your motorcycle attached but odds are you are still going to have sway issues. The overall weight of the trailer is a concern but more importantly is the tongue weight. The best option you have to decrease trailer sway with your trailer would be to add as much weight as you can to the tongue. The best way to add the most amount of weight would be to make...
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  • Bolt Through Swing Away Trailer Jack For Limited Space Trailer Tongue
    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...
    view full answer...
  • Recommended Trailer Jack with Lower Retracted Height for Landscaping Trailer
    I looked through our selection trying to find a similar jack to the MaxxTow, part # 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...
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  • Recommendation For a Weld-On Replacement Jack For Boat Trailer
    I did some research and it looks like your current Shelby jack had a 1,000-lbs to 1,500-lbs weight capacity with a 10 inch lift. For a similar jack that is weld-on, I recommend the Fulton XLT Bolt-Thru Swivel Trailer Jack, Item # F141132. This Fulton jack swivels and is great for marine use. It mounts to 3 inch x 3 inch, 3 inch x 4 inch, and 3 inch x 5 inch trailer frames. It has a 12 inch lift and a weight capacity of 1,500-lbs. If you need the weld-on mounting bracket and hardware...
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  • Bolt-On Side Mount Caster Wheel Tongue Jack to Replace Fulton 1000-lb Jack
    We do sell replacement jack parts including the main screw like the one shown in your photo. Examples of these replacement jack screws are # TJD-12000-RODNUT, # BD500250 and # BD500217 which are shown on the linked page. Unless you can positively identify the model of Fulton jack you have I strongly recommend replacing the whole jack instead of trying to rebuild the old one. You may even save money by getting a new jack; you'll also get a new warranty and have the confidence of knowing...
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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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  • Is 1,500 lb Trailer Jack Enough for 21 ft Boat Trailer
    Trailer jacks are rated for the amount of tongue weight that the trailer has. Typically trailer tongue weight is around 10 percent of total trailer weight. So for a 1,500 lb jack to be at capacity the trailer would most likely weigh near 15,000 lbs. So a 21 ft boat trailer would have no problem with a 1,500 lb jack capacity. Our most popular swivel jack for a boat trailer is the part # MJ-1200B which has a 1,200 lb capacity and would work well.
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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 for 2009 Ranger Boat Trailer
    Trailer makers don't maintain detailed specs on items like the jacks they supply on their new trailers but we do offer many types and capacities so we'll have one that will work for you. It is best to select a jack with more capacity than you actually need; the same is true for hitches and winches. Such items, when operated below their maximum capacity, typically last longer than ones used near their limits. I linked our main page for side-frame-mount jacks. You can click on your required...
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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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  • Similar Version of etrailer Side Mount Jack with at Swivel and Wheel Caster
    The etrailer.com 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 etrailer.com 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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  • Weight of Dexter Trailer Hub and Drum Assemblies and Other Trailer Accessories
    The Dexter Trailer Hub and Drum Assembly # 84557UC3-EZ weighs 24 pounds. The Dexter Nev-R-Adjust Electric Trailer Brake Kit # 23-468-469 has a total weight of around 20 pounds. The Timbren Axle-Less Trailer Suspension System # ASR2000S02 weighs around 72 pounds total. The Redline EZ Lube Spindle # R20384EZ weighs 5 pounds. The etrailer.com Round Swivel Marine Jack # MJ-1200B has a weight of 15 pounds. The Tekonsha Prodigy P3 Trailer Brake Controller # 90195 weighs in...
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Info for this part was:

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

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