Most ­boat-trailer jacks are operated manually. The boater cranks the handle to move the jack up and down and raise or lower the boat. Other jacks are available today that work ­using an electric ...

Trailer Jack and Parking Brake. When not attached to a vehicle, trailers are often stored leveled by a trailer jack. The jack should move smoothly and fully support the trailer, even under load. Some ...

Many times, you can move an aluminum fishing boat or personal watercraft simply by pushing it around yourself. This is contingent on having a tongue jack with a small wheel to support the front of the ...