Bobs Machine Action Series Hydraulic Jack Plate Bobs Machine Action Series Hydraulic Jack Plates are built to be powerful, durable, and versatile. The Action Series jack plates are the first jack plates to offer a pump inside the jack plate structure, eliminating the need to mount a pump inside the boat. This unique feature gives boaters more room inside the boat and helps save time in rigging. Additionally, Bobs hydraulic jack plate can be converted to have the pump inside the boat if the owner