These outboard lifting devices work independently of power trim and tilt to allow the boat-engine-prop combination to work at maximum efficiency, to adjust your engine down, when underway at full speed for better out-of-hole shots, or up, for more top end speed and better prop clearance in shallow water. Flick a switch to find the optimum engine height for any condition.Superior construction makes these transom jacks a top choice. Made of 1/2" 6061 T6 aluminum throughout, without welds or castings. The self-contained hydraulic unit has its own fluid reservoir, and contains a permanent magnet motor. The 2"dia. hydraulic cylinder has a lifting capacity of over 7,800lb., to lift even V-6 engines at full throttle. The bracket moves up and down on low-friction rollers, which have no binding or vibration problems. Designed for V-6 and smaller outboards. Setback is 5-1/2" and vertically travels 5". Setting the engine back from the transom has the advantage of putting the prop in “cleanerx9D water and helps eliminate prop slippage. Pre drilled to fit standard B.I.A. patterns for all outboards 40hp and up. Comes with or without a dash-mount position indicator. Includes all mounting hardware. 18-1/8"W x 15-1/2"H. Actuating Mechanism 12V hydraulic actuator, rated at 7,800lb thrust Engine Capacity 300 HP V-6 or smaller, standard BIA mounting holes Included Equipment All wiring, switches, and mounting hardware Dimensions 18-1/8"W x 15-1/2"H, 5-1/2" setback Cutout Size Toggle switch - 1/2"dia.; Gauge - 2-1/8"dia. Draw 25 to 60 amps Weight 45lb. complete Warranty One year