Authors: PAVLE PROFACA
Menthor: ANDRE TIBLJAŠ
School: Rijeka School of Electrical Engineering and Trades
Country: CROATIA
e-mail: eios@eios.hr
A hydraulic jack plate is an outboard motor accessory installed between the transom and the engine. Unlike a standard trim system, it allows the entire engine to be raised and lowered vertically without altering the tilt angle. It consists of a sturdy aluminum structure mounted to the vessel’s stern, with the engine attached to the plate itself rather than directly to the boat. This enables precise vertical engine movement (up and down), providing greater control over the vessel’s draft and performance. Hydraulic models are easily operated via the push of a button, even while underway. Compared to a conventional trim system, a hydraulic jack plate offers several key advantages. It allows for safer navigation in shallow waters, as raising the engine reduces the vessel’s draft. It also improves efficiency and speed by reducing water resistance and optimizing propeller operation, which can lead to lower fuel consumption. An additional benefit is the ability to fine-tune performance: lowering the engine improves propeller-to-water contact, enhancing acceleration and stability, while raising it reduces drag, allowing for higher top speeds. Thanks to its functionality and practicality, the hydraulic jack plate is an ideal solution for boaters looking to maximize their vessel’s potential across various navigation conditions.