Abstract: A modular assembly of diverse electrical components for operation of an outboard motor including a box in which the components are inserted and/or mounted and prewired. External leads are organized for passage through a few specially located openings in the box for external connection. The fully assembled and prewired assembly is enclosed with a demountable cover and attached directly to the engine block. The modular assembly alleviates indiscriminate component mounting and corresponding disarray of interconnecting lead wires. In addition the moisture and corrosion resistance of the components is enhanced.

Abstract: An electromagnetically operated fuel injector includes a disk-type armature and a ball-type valve joined to the armature. The response characteristics and speed of the injector's ball valve are improved by modifying the surface structure of the valve ball to reduce its mass. Preferably a plurality of plunge-ground "flats" are formed on the surface of the ball.