1. A propeller drive assembly, the propeller drive assembly comprisinga driveshaft for transferring a torque between an engine and a propeller of a water surface vessel, and
a housing enclosing the driveshaft,
wherein the propeller drive assembly comprises, separately from the driveshaft, a first element and a second element, the first element extending through a first bore of the second element,
wherein the second elements is fixed to the driveshaft and the first elements is arranged to be stationary in relation to the housing,
the second elements which is fixed to the driveshaft presents in the first bore a first elongated cavity forming a first helix along the first bore, so as to form with the first elements a screw pump, andthe driveshaft presents a second bore extending inside and concentrically with the driveshaft.