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etrailer Boat Trailer Jack w/ Wheel - Sidewind - Swivel - 11" Lift - Zinc - 1.2K
etrailer

etrailer Boat Trailer Jack w/ Wheel - Sidewind - Swivel - 11" Lift - Zinc - 1.2K

Part Number: MJ-1200B
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$53.35
Trailer Jack
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Swing-up boat trailer jack is perfect for your small boat or jet ski trailer. 6" Caster swivels 360 degrees to make it easy to maneuver your trailer. Clear zinc finish fights rust and corrosion. Great Prices for the best trailer jack from etrailer. etrailer Boat Trailer Jack w/ Wheel - Sidewind - Swivel - 11" Lift - Zinc - 1.2K part number MJ-1200B can be ordered online at etrailer.com or call 1-800-940-8924 for expert service.
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  • Reviews (851)
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etrailer Trailer Jack - MJ-1200B

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

Swing-up boat trailer jack is perfect for your small boat or jet ski trailer. 6" Caster swivels 360 degrees to make it easy to maneuver your trailer. Clear zinc finish fights rust and corrosion.


Features:

  • Supports, lifts, and lowers your boat or recreational trailer
  • Swings up and down smoothly
    • J-bolt handle lets you position jack quickly
  • Makes it easy to move your trailer in tight spaces
    • Caster turns a full 360 degrees
  • Resists rust and corrosion with clear zinc finish
  • Avoids winch posts, tool boxes, or other accessories mounted on your trailer
    • Sidewind handle lets you crank jack without your hand getting smashed
  • Creates a stylish flair with the spoked wheel
  • Bolts around trailer frame
    • Includes mounting bracket and hardware


Specs:

  • Application: trailers frames 2" to 4" tall
  • Lift capacity: 1,200 lbs
  • Bracket height:
    • Retracted: 12-1/2"
    • Extended: 23-1/2"
  • Screw travel : 11"
  • Inner tube diameter: 1-3/4"
  • Outer tube diameter: 2"
  • Handle radius: 6-5/8"
  • Wheel dimensions: 5-3/4" diameter x 2" wide
  • 1-Year warranty


Dims Bracket

How to Determine the Lift Capacity You Need in a Jack

A trailer jack lifts your trailer high enough at the tongue to allow you to couple it with your vehicle. Usually, your tongue weight is about 10-15% of your gross trailer weight (GTW). For example, a 10,000-lb trailer has a tongue weight of 1,000 lbs to 1,500 lbs. To raise the tongue of a trailer this size, you'd need a jack that can handle a static load of no less than 1,500 lbs. And, yes, it's okay to have a jack with a weight rating that is higher than your trailer's tongue weight. In fact, a jack with a higher capacity should operate more efficiently, allowing you to spend less time cranking and more time fishing.



MJ-1200B etrailer by Ram Trailer Jack - Swivel - Bolt On - Zinc - Side Wind - 11" Travel - 1,200 lbs





Customer Satisfaction Score:


Customer Reviews

etrailer Boat Trailer Jack w/ Wheel - Sidewind - Swivel - 11" Lift - Zinc - 1.2K - MJ-1200B

Average Customer Rating:  4.8 out of 5 stars   (851 Customer Reviews)

Swing-up boat trailer jack is perfect for your small boat or jet ski trailer. 6" Caster swivels 360 degrees to make it easy to maneuver your trailer. Clear zinc finish fights rust and corrosion.

by:

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!!

Jan

7/14/2024

1 year later and this trailer jack is going strong. Zero issues and makes moving our trailer in a tight garage a breeze.



by:

Great replacement fo the stock jack

Floridaman

10/1/2024

After a year the jack is still holding up nicely. Granted, I no longer use it in a salt environment, but I do use it regularly in a freshwater environment. Still cranks easily.



by:

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...



by:

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!



by:

Another smooth transaction.
I will shop
with e trailer again in the future.
Thanks Cal



by:

Exactly what we needed. Definitely will buy again. We love working with etrailer as they always come through for us. Vicki N has been huge help setting us up and walking us through the process.



by:

Needed this for my teardrop. Use it to adjust the tongue height for non flat camp sites.



by:

Sturdy and does the job well



by:

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!



by:

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



by:

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



by:

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



by:

arrived as advertised. Installed easily. Fits perfectly.



by:

Always the best company to do business with. Highest quality



by:

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.

10/11/2018

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



by:

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

Stephen

4/16/2022

Works great, looks like new. Makes hitching up a breeze.



by:

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.

6/27/2018

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.



by:

Haven't used it yet, but seems solid!

Luke

10/6/2023

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.

10/20/2023

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


by:

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



by:

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.



by:

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.



by:

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

Dave L.

4/21/2018

Have used it for a year. Still like new!



by:

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....



by:

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.



by:

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







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Show More Reviews

See what our Experts say about this etrailer Trailer Jack

  • Replacement Jack Options For a Shelby 4587 Trailer Jack On a Boat Trailer
    I have a couple options for you to consider as no one makes a jack that will bolt on in place with your Shelby 4587 jack bracket you have welded to your frame. First the Round Swivel Marine Jack w/ Wheel # MJ-1200B is the closest we have to the design of your jack. This will bolt to your trailer frame either just behind your current welded jack bracket or you can have the bracket cut off and install the jack in the same place. The Xtreme Off-Road Swing-Up Trailer Jack w/ Dual Wheels...
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  • Replacement Tongue Jack For Boat Trailer With Knott 1,200LB Jack
    Since we do not carry any rebuild kits for your Knott jack and I do not see any kits available online, I recommend switching to our Round Swivel Marine Jack # MJ-1200B. If this jack needs rebuilt we have the following common replacement parts. Replacement Gear Kit # MJ-1000B-GR Removable, 6" Poly Caster Assembly # JWK-6P Replacement Bearing # MJ-1000B-BR Replacement Sidewind Handle Knob # MJ-1000B-KB
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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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  • 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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  • 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.
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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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  • Are RAM Jacks and etrailer Jacks the Same
    Kelly, the RAM jack MJ-1200B is the same thing as the etrailer # MJ-1200B. The discrepancies in the outer and inner tube measurements (3/8") are what we measured, versus what the original manufacturer measured. Sometimes the manufacturer measures one thing, but when we get our hands on it and re-measure it for our site we get a different measurement, which I believe is what you're seeing here.
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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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  • 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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  • 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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  • 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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  • Is There a Replacement for a Shelby Jack 5856A That Uses Existing Bracket
    I do have an option for you but the Shelby trailer jack mounting bracket that you have welded to your frame won't be able to be reused with any newer jack. The Shelby trailer jacks did use similar designs in regards to mounting like the bolt-through and snap ring that some current jacks have but they are simply not cross-compatible. The bolt-through option for example from Shelby has a flat plate whereas the current models have a recessed portion. Therefore, the best option for you would...
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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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  • 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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  • 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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  • 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 Replacement for 1998 Coleman Fleetwood Westlake
    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 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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  • 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 some...
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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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  • 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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  • Looking For Trailer Jack With 1-3/4" Tube Diameter
    Hello Kirsten, thanks for reaching out. Unfortunately, we do not offer a trailer jack with a 1-3/4" outer tube diameter. There used to be a jack from Bulldog that had a 1-3/4" tube diameter, but it has been unavailable for quite some time. Most of the jacks we offer have a 2" outer tube diameter like the etrailer Boat Trailer Jack # MJ-1200B. The inner tube has a 1-3/4" diameter, but the outer tube is 2".
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  • What Replacement Parts Are Available for an etrailer MJ-1200B or Fulton Swivel Marine Jack
    You can replace the mounting bracket and hardware on an # FXP10W0301 or # MJ-1200B, but the tube and swivel bracket are not available as replacement parts for these jacks. You can use the Replacement Mounting Kit for etrailer and Ram Swivel Marine Jacks - 1,200 lbs and 1,500 lbs # MJ-1000B-MK for the mounting bracket and Replacement Mounting Hardware for etrailer and Ram Swivel Marine Jacks - 1,200 lbs and 1,500 lbs # MJ-1000B-MBB for the hardware. You can also replace the inner bearing...
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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.
    view full answer...


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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 Ryan F
Updated by:
Ryan F
Employee Amanda M
Written by:
Amanda M

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