Marine propulsion device

Abstract

A marine propulsion attachment ( 7 ) for a brush cutter device having an engine and a first shaft ( 2 ) mounted within a tube ( 3 ) and rotatable by said engine, said attachment ( 7 ) comprising a propeller ( 10 ) connected to a second shaft; a protective shroud ( 12 ) for said propeller ( 10 ) and rotatably supporting said second shaft; and connection means to interconnect said shafts to permit their simultaneous rotation by said engine.

1 . A marine propulsion attachment for a brush cutter device having an engine and a first shaft rotatably mounted within a tube and rotatable by said engine, said attachment comprising: 
 a propeller connected to a second shaft;    a protective shroud for said propeller and rotatably supporting said second shaft; and    connection means to interconnect said shafts to permit their simultaneous rotation by said engine.    
     
     
         2 . A marine propulsion device including a mounting swivel adapted to be mounted on a marine or riverine craft receiving said tube and permitting longitudinal movement of said tube relative to said swivel, rotation of said tube in an azimuth plane, relative to said swivel, and rotation of said tube in altitude relative to said swivel  
     
     
         3 . A marine propulsion device according to  claim 1  or  2  wherein the connection means includes a drive reduction gearbox.  
     
     
         4 . A marine or riverine craft propulsion device, said device comprising a brush cutter having an engine, a shaft rotatably mounted within a tube and rotatable by said engine, a propeller rotatably mounted within a protective shroud for said propeller and rotatably by shaft, a mounting swivel adapted to be mounted on said craft receiving said tube and permitting longitudinal movement of said tube relative to said swivel, rotation of said tube in an azimuth plane, relative to said swivel, and rotation of said tube in altitude relative to said swivel.  
     
     
         5 . A surfboard, surf-ski or like marine craft having an upper person supporting surface and an under surface, a brush cutter device having an engine, a shaft rotatably mounted within a tube and rotatable by said engine, a propeller rotatably mounted within a protective shroud for said propeller and rotatable by said shaft, said tube and shaft being longitudinally aligned with the longitudinal axis of said craft and passing there through between said surfaces, said engine being located above said upper surface and said propeller being located below said lower surface, whereby said propeller is rotatable by said engine to advance said craft through water, and said craft is steerable by altering the weight distribution of said person.  
     
     
         6 . The surfboard, surf-ski or like marine craft according to  claim 5 , wherein said engine of brush cutting device is housed within a waterproof protective shroud fitted with a snorkel breathing attachment.