It sounds like the Bulldog A-Frame Jack, part # BD500200 is just what you are looking for. The BD500200 has an outer tube diameter of 2-1/4 inches which matches what you are replacing and this jack has 2 toggle switches. One is used to control the up and down movement of the jack and the other switch turns the LED lights on and off. The mounting plate features mounting holes that allow you to mount it so the controls are at the front of the jack or mount it so that the controls are...
The best jack is extremely relative, and is dependent on many factors. The Etrailer.com Electric Jack w/ Footplate - A-Frame - 25-1/8" Lift - 3.5K - Black # EJ-3520-BBX will work very well for your 3500 lb dry weight travel trailer and has an excellent price point for this type of jack. It includes a 5-5/8 inch inch drop leg to allow faster extension and retraction and utilizes 2 switches for function; one for power and one for raising or lowering the jack. It also has LED lights to...
The former, obviously, and through personal experience, is much harder to use than the latter. However, the primary benefit of the manual jack is that it COULD be less prone to breaking since it is a simpler device. The electric trailer jack could fail electrically or mechanically. The electric trailer jack will also require installation or some know-how as far as wiring goes. 

This custom-fit mount lets you secure your Hi-Lift jack to the driver's side of your Jeep. The jack mount lock codes to your ignition key. Automotive-grade, weather-resistant black powder coated of keys - for your hitch lock and coupler lock, your pickup cover or trailer door, and all the various padlocks securing your equipment? Tired of fumbling for the right key or having to replace a lost key?
Even after I read the many bad reviews I decided to give this a try. I wasn't going to just let my tongue jack get rusty and broken. I know alot of you said it leaked and wasn't water resistant so I decided to use my waterproofing spray I use on family shoes on this cover. After a few crazy wind/rain storms it is staying dry. Hubby and I are happy with it.
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