There are several places water can get into any given jack. Water should be able to drain out though. If the exit points which would be at the lowest point are clogged then the water would not be able to exit. You could use a jack cover like # UF38-944020 for future use. There is no telling how much damage is really done. If there is enough corrosion then something inside could be structurally compromised and fail when you have weight on the jack. I would not be comfortable offering...
We highly recommend getting yourself an electric trailer jack. Marshall has always had one on his Lance, and Kelly just recently got our #1 recommended Husky electric jack after almost three years living with a manual jack, and she couldn't be happier. For Kelly, it was one of those "Why didn't I do this a long time ago" reactions. Oh well, nothing like living in the present and not bitching a fit every time you have to hook up! No more worries about Kelly's back going out because of her jack. Her back is jacked, but her back won't go out due to a jack. Something like that. 
Yes. A 3,000 pound electric jack will work just fine. Based on your trailer weighing 7,500 pounds loaded will equate to your tongue weight between 750-1125 pounds. Although you can choose a 2,500 pound (see link attached) electric jack, I would highly recommend the Stromberg Carlson # JET-3555 (white) or # JET-3755 (black) as they are rated at 3,500 pounds. I think you will really like the price point! I have also included an FAQ for you too.

Eliminate the physical exertion commonly associated with lifting and lowering a trailer when you use a Stromberg Carlson 3500 lb. Electric Tongue Jack. It does the heavy lifting for you, and has lots of other features as well. For example, the trailer tongue electric jack has equalizing bars that are easy to set, so you get better results, and two separate LED night lights that provide both added safety and additional illumination. The leg extends up to 23; and although it is heavy and durable, it's also surprisingly lightweight and easy to store.


10 Diodes Super Bright LED Side Marker Light 4"x2" Combination Side Clearance Marker Light , 2-Wire Design ; Surface Mount This is one of our best selling light for Trucks, Trailers, and Pickups. Color:Red Amber Length: 4" long x 2" Wide x 1" high approx 10 LED’s Ideal for cab and sleeper panels Fits Standard 3" mounting Holes 100,000 Hour Rated LED Life Mounting holes are 3" center to center approx. Package included: 10x Red Side Marker Lights 10x Amber Side Marker Lights.
NEW Improved Size! (as of 9/12/17) 14″H x 5″W x 10″D. At Carver Industries, we don’t strive to build the least expensive product. We strive to build The Best quality product at a very competitive price. With over 30 years experience fabricating products that withstand the rigors of the outdoor elements. The RV electric jack cover protects your unit from UV damage and environmental hazards. Universal RV electric jack covers are an excellent solution for protecting the finish and prolonging the original appearance of these systems. Each cover has 1/8″ strong and durable draw rope with a barrel cord lock in the hem for quick easy installation and removal. Recommended for storage only. EXCELLENT QUALITY 100% Solution Dyed Polyester means Sun-DURA colors are part of the polyester fiber itself, rather than the dye adhering only to the surface of the fibers. 7oz. marine grade polyester that offers superior resistance to harmful UV rays, fading, mildew, tearing and overall wear-and-tear. Our own unique finish provides exceptional water repellency while maintaining breath-ability for the health of the electric jack components. Made in USA and Imported. (7 Year Limited Warranty)
Use this electric tongue jack to lift your trailer with the flip of a switch. The sturdy steel jack can handle up to 3,500 lbs. It has 19" of travel and a 5" drop leg for extra lift. LED Features: Electric jack with 12V motor lets you lift and lower your A-frame trailer quickly and easily Top-mounted toggle switches are easily accessible Large LED side lights make it simple to set
×