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...
Take the effort out of lifting your trailer with this electric jack from Stromberg Carlson. The sleek black jack features an LED light for nighttime use, as well as water-resistant switches trailer's A-frame - hardware included Rust-resistant, powder coated steel parts are strong and durable Jack cover is made of vacuum-formed plastic for extra protection from severe weather Zinc-plated steel
Please inspect the packaging of your item(s) when they arrive, if you notice any damage you should make note of it on the delivery date. If your item(s) do arrived damaged, please send photos to firstname.lastname@example.org and we will process an insurance claim on your behalf. When installing your cover Please be sure the unit is clean and sharp objects are covered accordingly when to prevent any damage. A dirty, ripped, scratched or torn cover cannot be returned for a refund. Manufacturers warranty information can be found by clicking the "Featured Manufacturers" tab at the top of our homepage. A warranty may be void if the product has been damaged by accident, misuse, abuse, or other abuses not arising out of defects in material or workmanship and does not cover everyday wear and tear.
This fits nicely on our travel trailer power jack. We purchased it to stop the sun fading the black jack. Although we purchased and started using this a couple months ago, after days of heavy rain here recently we thought it would be prudent to check under it today. Yes, it is not waterproof BUT it was only damp under there and all the electronics still worked so we were happy. Let's face it, the manufacturers make the jacks to be weatherproof so a bit of water/damp should not hurt them. I do like another reviewer's idea of putting a plastic bag on first and then putting this cover on top though. A great idea!