Sierra Deluxe Plus 1500 lb Swivel Trailer Jack with 8-Inch Wheel

A trailer jack is one of those parts you don't think about until you're standing in a boat ramp parking lot trying to muscle a loaded tongue off the ball by yourself. The Sierra Deluxe Plus takes that job and makes it easy. It bolts onto tongues up to 3 by 5 inches, lifts up to 1,500 pounds, and swings up out of the way once you're hitched and rolling. For most boat, sport craft, and snowmobile trailers, it's exactly the right tool for the job.

Here's what the swivel part buys you. When you're ready to tow, the whole jack pivots up to horizontal so it tucks in tight and clears the ground. Drop it back down at the ramp or in the yard and the 8-inch caster wheel lets you roll the tongue around by hand. That's a real back-saver when you're repositioning a trailer in the driveway or lining up on a tight coupler. The comfort grip handle on the side-wind crank raises and lowers the tongue through 12 inches of travel, enough to clear the ball on most setups.

The 1,500-pound lift rating covers a wide range of single-axle boat and utility trailers. One honest word of advice: size the jack to your loaded tongue weight, not your boat's dry weight. Once you add a full fuel tank, batteries, gear, and a kicker, tongue weight climbs fast. If you're right at the top of the range on a bigger rig, step up to a heavier jack. For the average 16 to 20 foot boat trailer, though, 1,500 pounds gives you plenty of margin.

Installation is a straightforward bolt-on. The jack ships with mounting hardware and clamps to the standard 3 by 5 inch tongue channel most trailers use. One thing worth checking before you torque everything down: on a full-thickness tongue, make sure the supplied bolts thread through with enough bite. If your tongue runs on the thick side, a pair of slightly longer grade-5 bolts from the hardware store does the trick. No welding, and no drilling if your tongue already has the holes.

The frame is zinc plated with a black textured finish, which holds up fine for freshwater and trailer-yard duty. If you launch in salt, treat it like any other trailer hardware. Rinse it down after every trip and keep an eye on the weld areas. A quick shot of grease keeps the wheel bearing turning, and it's worth doing before the trailer sits over winter. That one habit is the difference between a wheel that rolls next spring and one that's seized solid.

A couple of field notes from using these. That 8-inch wheel rolls great on pavement and hard-packed gravel. On a soft, sandy ramp it can dig in under a loaded tongue, so a scrap of plywood or a flat board under the wheel gives it something to ride on. And when you crank the tongue up, keep the load centered over the jack so the leg stays straight and the gears aren't fighting a side load. Little things, but they keep the jack working smoothly for years.

So who's this for? Anybody towing a boat, personal watercraft, snowmobile, or small utility trailer who wants a solid, no-drama tongue jack that gets out of the way for the road. It's not a heavy 5,000-pound RV jack, and it isn't trying to be. It's a well-built 1,500-pound swivel jack with a real wheel, a comfortable handle, and the hardware to bolt it on in an afternoon. Backed by Sierra's reputation for parts that meet or beat the original equipment they replace, it's the kind of upgrade you install once and stop thinking about. Rig it up right and you'll forget it's there, which is exactly what you want from a trailer jack.