Abstract: A mount for supporting part of a marine drive system to a marine hull, the mount comprising a rigid outer housing (832) defining a radially outer circumferential surface on its radially inner surface, a resilient mounting (831) disposed radially within the outer housing and defining a radially inner circumferential surface, the marine drive system passing through and supported by the resilient mounting in use, wherein a circumferential radial gap is provided either between the resilient mounting and the rigid outer housing or within the resilient mounting.

Abstract: A hub (101) for a marine propeller, the hub being formed from first (1012) and second (1011) cooperating sections which, when forming the hub, are aligned along the rotational axis of the hub, wherein the two cooperating sections define a plurality of recesses (1061) into each of which a fin assembly can be inserted, thereby forming a propeller, and wherein of the first and second sections, only the first cooperating section is arranged to be connected, in use, to a drive shaft.

Abstract: A propeller (1) comprising a hub, and a plurality of fins (3) extending radially outwards from the hub, wherein each fin is moveably connected to the hub such that, during rotation of the propeller, the dihedral of each fin can be altered and controlled over a working range by movement of that fin about one or more axes of rotation (BB).

Abstract: A propeller comprising a hub (101) and a plurality of fins (3) extending radially outwards from the hub, wherein each fin is moveably connected to the hub such that, during rotation of the propeller, either the dihedral, the rake or both the dihedral and the rake of the fin(s) can be altered and controlled over a working range by movement of the fin(s) about one or more axes of rotation; and one or more actuators for controlling the dihedral or rake of the fins independently of the pitch of the fins.

Abstract: A marine drive system mounted in the hull of a marine craft, the marine drive system comprising an engine connected to a gearbox by means of a drive shaft (532), a propeller (1) connected to the gearbox by means of a propeller shaft (501), wherein the gearbox and the propeller are formed as a single rigid body for flexibly mounting in the hull of the marine craft as a single unit, and wherein the engine, gearbox and propeller are positioned such that they are always generally aligned with the longitudinal axis of the craft.

Abstract: A fin for use on a propeller, the fin comprising a lift generating section having a leading edge and a trailing edge, and a pair of surfaces extending between the leading and the trailing edges thereby defining a tip and a root having a root chord; and a dihedral section integrally formed with the root of the lift generating section and having a rotation axis about which, in use, the lift generating system can be rotated to vary the dihedral of the fin, the axis being generally parallel to the root chord of the lift generating section.