Abstract: Described is an acceptor/adapter device for securing an outboard jet motor to a watercraft. The acceptor/adapter comprises a shrouded opening for communication with an intake of the outboard jet motor. Sidewalls of the acceptor/adapter device can form a tunnel, wherein the tunnel is configured for directing a flow of water through the tunnel, into the adapter/acceptor device, and into the intake of the outboard jet motor. Also described is a hull with a tunnel for directing a flow of water to an intake of an outboard jet motor, as well as a directional device which allows for vertical or horizontal adjustments to the jet output or reversing the jet output.

Abstract: Described is a hull with a transom for supporting an outboard jet motor; a tunnel disposed in a bottom surface of the hull and extending to the transom; an adapter disposed where the transom and the tunnel meet, the adapter comprising a shrouded opening for communication with the outboard jet motor at an intake of the outboard jet motor; wherein the tunnel is configured for directing a flow of water through the tunnel, into the adapter, and into the intake of the outboard jet motor. Also described is a directional device which receives the jet output of the outboard jet motor and provides a capability for making vertical or horizontal adjustments to the jet output or reversing the jet output, and a boat which includes the boat hull and directional device.