Abstract: A seat lock device allows a seat to be unlocked and removed with one hand by rotating a lever member with one's fingertips and lifting an end portion of the seat. An engaging rod is mounted on either a bottom plate of a seat or a seat mounting bed. A support block, which has a locking rod, is mounted on the other of the seat bottom plate and the seat mounting bed. A lever member that engages with a bridge portion of the locking rod is pivotally mounted relative to the support block. Upon rotating the lever member with one's fingertips, both end portions of the locking rod are retracted against a biasing force of a spring from a receiving groove formed in the support block. Then, the engaging rod can be removed from the receiving groove to unlock the seat.

Abstract: It is an object of the invention to provide a personal watercraft having a rear deck floor which can house goods necessary for water-skiing or the like and is provided with a space where a water-skier or the like sits when getting into the water or a space for embarkation when coming out of the water into a watercraft. In a personal watercraft having a whole plane view almost shell-shaped comprising a riding seat S provided from an almost central portion of a body A of a watercraft to a rear portion thereof, a steering handlebar 21 provided in front of the riding seat S, an engine E for propulsion provided below the riding seat S, and a jet pump P provided behind the engine, the jet pump being provided with an outlet port rearward for being driven by the engine, a rear deck floor 1 having a space for at least one adult to sit is provided behind the riding seat S and has an openable hatch cover 1A formed on the space, and a rear storage box 1B is formed under the hatch cover 1A.

Abstract: It is an object to provide a reverser for a watercraft which has a high go astern efficiency and also functions as a side thruster while holding planing performance. In a reverser (1) for a watercraft in which a deflector (1A) is movably provided behind a pump nozzle of a water jet pump (P) to change the direction of water flow ejected rearward from the pump nozzle, thereby allowing the body (A) to go in reverse, a discharge port (1a) which directs the water flow in a transverse direction is provided on both side portions of the deflector (1A), thereby feeding the water flow from the discharge port (1a) along a transom (T) of the body (A).

Abstract: It is an object to provide a locking mechanism of a deflector for a watercraft which can perform the locking and unlocking operation of the locking mechanism simply by executing up-down movement of the deflector.