T-H Marine CMC Atlas Series Hydraulic Jack Plates - Black 4, 6, 8, 10, and 12 Designed to meet even the most challenging demands of todays high-performance outboards, the T-H Marine Atlas Hydraulic Jack Plate is right for the job. Featuring a one-piece design with a powerful, innovative rod and a slot lifting system that can handle even the heaviest V6 outboards up to 300hp. All hydraulics are built into the jack, relieving you of having to install those annoying pumps and reservoirs inside the