Bobs Machine Standard Series Hydraulic Jack Plate Proven quality since 1978, the Bobs Machine Standard Hydraulic Jack Plate is powerful, lightweight, and reliable. These jack plates are used to improve an outboard boats speed, holeshot, fuel efficiency, and makes navigating in shallow waters easier. Standard Series Jack Plates were designed to keep the least amount of weight on the transom as possible by keeping the pump inside the boat. The result is a unit that is the lightest weight jack plat