Share 'hydraulic propulsion? anyone have a go?'

so i am putting together a diesel electric system with a 10hp yanmar chinese L100 engine, and appropriate alternator to charge the batteries for my torqueedo electric outboard. Now the thought occurs to use the diesel to alternatively run a pump that drives  a hydraulic motor which then (magic happens here) drives a prop. i was thinking to maybe cut out the engineering of a pod with prop approach…