Abstract: A fuel injected watercraft engine includes a controller for continuing the operation of an electric fuel pump for a predetermined time period after the engine has been stopped. The control system additionally may include a routine for stopping the fuel pump if the lanyard switch is tripped or the watercraft is capsized.

Abstract: A component handling device that is adapted to provide determination of a component picked up by a pickup device by different recognition methods depending upon the size of the component picked up. One recognition method employs a light source and a receptor and is carried by the mounting head. The other device includes a fixed camera and the light source is carried either by the mounting head and/or fixed relative to the camera.

Abstract: A control system and method for a multi cylinder engine that employs a single sensor associated with only one of the combustion chambers for feedback control of that combustion chamber and for controlling the fuel/air ratio of the remaining combustion chambers. The control of the remaining combustion chambers is based upon the value of the feedback control upon the time of shifting between lean and rich mixtures. The reference value is selected, however, after the initial switch between rich and lean so as to permit time for stabilization. Engine protection is accomplished by cylinder diseabling. At that time feed back control is discontinued.

Abstract: A number of embodiments of engines having direct cylinder injection wherein the fuel injector is positioned so as to be shrouded by the piston during at least a portion of its stroke. This permits the use of less expensive and lower pressure fuel injection nozzles. The spray pattern of the injector is chosen so that some fuel is sprayed toward the spark plug to provide stratification, but the major portion is directed toward the head of the piston so to as insure a homogeneous mixture when operating at high speed, high load conditions. In order to improve scavenging under difficult running conditions injection may be skipped for one or more cycles to purge the cylinder of exhaust gasses before another injection occurs.

Abstract: A number of embodiments of two-cycle engines employing Schnurle-type scavenging. In addition, a tumble port is also incorporated so as to introduce a tumble charge into the combustion chamber and reduce the likelihood of fresh charge from exiting from the exhaust port. This tumble charge may be utilized to achieve stratification, and the fuel charge may be delivered to the combustion chamber through the tumble port or in proximity to it. Also, arrangements are shown for controlling the amount of tumble flow.

Abstract: A motorcycle having an exhaust system with an exhaust control valve that is provided to improve engine mid-range performance without adversely affecting high range performance. Several embodiments of valves are disclosed, all of which include a valve member that is movable to a position to obstruct the flow through the exhaust gas but is also movable to an opened position wherein the exhaust gas flow is completely unobstructed. The exhaust control valve is suspended independently from the chassis and is configured so as to promote smooth flow of exhaust gases through it.

Abstract: Marine propulsion unit having a propeller assembly formed with exhaust gas passages through the propeller hub. An outer pipe is provided to encircle the propeller hub with a radial spacing and has a rear end extending beyond the rear end of the hub so that the exhaust gas is forced to flow, during a reverse movement, from the exhaust gas passage in the hub to the space between the hub and the outer pipe.