Abstract: A replacement single tiller (1) has a cubical hollow base (4) from which throttle-operating cables (8a 8b) (etc) extend to different motor throttles for simultaneous throttle control. Within base (4) is rotary shaft (33) mounting pinions (30, 31) about the peripheries of which cables (8a 8b) are respectively moved by push-pull entrainment. Twist grip (3) on shaft (33) therefore controls both motors. Projection (5) fits between parallel arms of a motor bracket and is held therein by pin (18) in bore (14); such brackets are mutually interconnected by a transverse conducting rod for joint steering by the tiller.

Abstract: A vessel 1 has a transom 2 carrying a W-shaped (or two V-shaped) frames 3 symmetrically arranged about its median line. Thus varying sizes of outboard motors, mounted over the transom, for example in twos, can find equivalent arms of the frame 3 to abut against and are thus aligned and symmetrically mounted.