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...
According to the information I was able to find, the Ultra-Fab Electric A-Frame Jack you referenced, part # UF38-944016 would be a good choice for the Keystone Outback Toy Hauler you mentioned. The jack has a 3500 lb lift capacity, which is plenty for the listed tongue weight of the toy hauler, plus anything stowed on it. Among the many features of this jack, I like the fact that is uses LED lamps for long life as well as the fact that a 9/16 inch socket wrench can be used in an emergency...
When going camping in your RV, there are many accessories that you can add to make your experience more enjoyable. These accessories and parts include items as diverse as leveling blocks, chocks, air conditioners, towing items, and even awnings. When considering awnings and other RV parts, it is important to understand the benefits they provide you.

Application: for use on heavy duty trucks, semi trailers, cargo trailers, boat trailers, work vehicles and a wide or narrow overland vehicle requiring quality DOT rated lighting. Product Features: Brand new, waterproof, Super bright Red LED Surface Mount, sealed 15" light Each light has 11 Super Diodes for a Bright Performance. Functions as clearance, side marker or identification light, stop, turn, tail and brake light These light bars have 3 wires for ground, brake, turn and tail light.(White is ground,Black is running lights,Red is turn and brake.) They have 2 screw holes for mounting Comes with a Polycarbonate Lens with All Weather Housing for durability Convert your old incandescent lights to more modern LEDs. Dimensions: 15.5" x 1.25" x 0.5" Hole Center to Center is 14-1/2".
Extreme Max BoatTector all-purpose buoys are designed for Extreme Max BoatTector all-purpose buoys are designed for use in most marine conditions from high seas to calm lakes. Versatile design is perfect for use as a marker buoy in most applications. Constructed of UV and chemically resistant PVC. 2-year limited warranty.  More + Product Details Close
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 
International shipping and import charges paid to Pitney Bowes Inc. Learn More- opens in a new window or tab Any international shipping and import charges are paid in part to Pitney Bowes Inc. Learn More- opens in a new window or tab International shipping paid to Pitney Bowes Inc. Learn More- opens in a new window or tab Any international shipping is paid in part to Pitney Bowes Inc. Learn More- opens in a new window or tab

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)
The Ultra-Fab Electric A-Frame Jack # UF38-944017 is a great choice for your 2009 Sunnybrook Edgewater Travel Trailer. It has the industry standard mounting of 3 inches on center to mount to your coupler and has an 18 inch lift. The round footplate is a 6 inch diameter for great support and stability. It has a 9/16 inch bolt that will allow you to use a deep well socket to extend of retract if the battery fails. You may also be interested in the Ultra-Fab Protective Cover # UF38-944020...
Application: for use on heavy duty trucks, semi trailers, cargo trailers, boat trailers, work vehicles and a wide or narrow overland vehicle requiring quality DOT rated lighting. Product Features: 100% Brand New COMPLETELY SEALED AND WATERPROOF Super bright Red LED Surface Mount, Sealed 17" light Each light has 23 Super Bright Diodes for a Bright Performance. Functions as clearance, side marker or identification light, stop, turn, tail and brake light These light bars have 3 wires for ground, brake, turn and tail light. They have 2 screw holes for mounting Comes with a Polycarbonate Lens with All Weather Housing for durability Convert your old incandescent lights to more modern LEDs. POLYCARBONATE LENS IS SONIC WELDED TO THE HOUSING Voltage:12V Size: 44 x 2.6 x 2.2cm (17 x 1 x 0.88 Inch).
Ball Screw Drive MechanismThe ball screw drive uses ball bearings (rotational friction) that offers superior performance over metal-on-metal gear mechanisms (sliding friction) used by other manufacturers. Ball screw drives use less power, have better lifting capability, provide quieter operation, and offer additional benefits.Ball Screw Drive Mechanism

I went out to the warehouse to look at the Lippert Electric A-Frame Tongue Jack, # LC285318. In order to remove the screws that secure the cover you will need a long and thin phillips head screwdriver. If you don't already have one, you'll want to purchase a Protective Cover, # UF38-944020, to keep your jack dry when you are at the campsite. This will protect the head of the jack and keep the motor protected from the elements.


Features: ---Strong Fine Mesh Screen --- Extra Strong Galvanized Steel Roof Flange with Mill Finish --- Vent Color is White --- Includes 70" of 3/4" Butyl Tape ---Includes 28 screws for mounting the roof vent --- No Garnish Ring --- Will replace existing Elixir or Ventline Products --- Standard OEM Dimensions (Opening 13.25" x 13.25") Mounting Flange (16.5" x 16.5") Power Vent Options Available (Visit our store for the listing) * Garnish not included.
14-1/2" x 17-1/2" Weatherproof cover slips easily over your electric tongue jack and secures with drawstring. Helps to protect jack motor from the elements. Fits Ultra-Fab Odyssey and most Features: Weatherproof cover protects your electric jack from dirt, grime, and inclement weather when not in use Slips over top of jack to cover motor assembly, switch and/or light Drawstring runs
Quickly and easily install a 4-way trailer connector on your vehicle with this custom harness. T-One connector plugs directly into OEM tow package wiring harness - no cutting or splicing required. vehicle's wiring matches that of your trailer Powered module connects directly to avoid overloading your vehicle's electrical system Constructed of 16-gauge bonded wire Comes with dust cap for 4-way flat
The Odssey series of electric tongue jacks is the only one that comes with an emergency ratchet style crank socket allowing for easy cranking even if the propane tanks are close behind.* Emergency ratchet style crank socket* Water resistant switches* 18 inch of travel* Easy bolt on installation* Powder coated finish resists rusting.* Extra large adjustable footpad for 4,000 pound unit* Hardened all steel gears Die-cast aluminum cap* Large front light for easy night time viewing* 2 1/4 inch outer tube on 4,000 pound unit.4,000 black.

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.

RV, Marine LED Porch Light, New LED Rectangle Porch Light Without Switch Free Shipping, Ships Same Day Or Next Business Day ---LED Rectangle Porch Light Fixture 220 Lumens, with one clear and one amber lens. ---Made with Environmently friendly technology and materials. ---Wide Voltage Range : 11-18 volts ---Applications include 12 Volts DC recreational vehicles. RV fluctuations can damage a regular LED. This LED is designed to withstand a wide operating voltage range. ---Beam pattern : 120 degrees ---6" w x 3 5/8" x 1 3/4" ---BRIGHT: 220 Lumens ---Color Temperature : 6000-6500K, Cool White ---24 High power 2835 LEDs. ---2.7 Power Watts ---60,000 hour life expectancy. ---Lasts many times longer than standard light bulb. ---In stock.
Then inside, we're going to have a nice soft material. Even if the wind's blowing this around a little bit or something like that we're not going to have to worry about any abrasion on our jack. The way it works is the simple drawstring here is going to pull down and secure around the outer tube of our jack. We'll just slide it over the top just like this, then cinch to close. This is going to protect not only the jack motor body itself but also our switches and out light from any kind of discoloration from UV fading. Also, it's going to protect it from the rain, the snow, dirt, debris.
Mildew Prevention and Treatment No matter how carefully maintained, every RV cover can be a target for a case of mildew. What causes mildew and what are the most sensible ways to prevent and treat it? Mildew is a form of fungus present everywhere in the world. It is a primitive plant form that feeds on other plants and produces microscopic, seed-like spores that float freely. It takes dark, damp conditions to encourage their growth. Synthetic cover fabrics do not support the growth of mildew. Natural cover fabrics (those containing cotton) can support the growth of mildew, but such fabrics are treated with mildew inhibitors that will, with proper care, typically outlast the warranty period of the cover. However, dirt, pollen and other environmental particles that embed between the fbers of any cover fabric are gourmet fare for mildew and therefore, no RV cover fabric can prevent mildew from growing. Most remedies rely on sodium hypochlorite (household bleach) to remove mildew. A good, strong, all-around solution is ½ cup household bleach per gallon of water. Do not use liquid detergents in combination with bleaches. Scrub the affected surfaces with a soft brush, using rubber gloves and eye protection. Rinse thoroughly. For cleaning our covers, we highly recommend 303 Marine & Recreation Multi-Surface Cleaner which is safe and effective. Be aware that repeated cleanings can diminish the water repellency of the canvas. To restore water repellency to factory-new levels, we highly recommend 303 Marine & Recreation Fabric Guard. Remember that anything used to kill or remove mildew will wash or wear away over time, so be prepared for repeated treatments as part of your maintenance routine.
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?
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