Servo-assisted steering arrangement for an element pivotable about a steering axis, for example a propeller drive means suspended on a boat transom, said drive means driving a pair of hydraulic steering cylinders (20a, 20b) which connect the drive means to the transom. A manually driven low pressure pump (39), for example a steering wheel pump, communicates both with a cylinder chamber (70, 71) in each steering cylinder (20a, 20b) and with a control valve (36). A motordriven high pressure pump (41) communicates via the control valve with the other cylinder chamber (72, 73) in each steering cylinder. The control valve is disposed so that, when the low pressure pump is driven, it opens a communication both between the pressure side (40) of the high pressure pump and a cylinder chamber (72) in the one cylinder (20b) and between the return side (42) and the corresponding cylinder chamber (73) in the other cylinder.
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