Retractable propulsor for boats
Retractable system for stowing away the propulsion...
Retractable trolling motor
Retractable trolling motor housing for boat
Reversible motor mount for canoe
Reversible stern drive marine propulsion system
Reversing marine gas turbine drive
Rigging apparatus for an outboard motor
Rotary valve actuated hydraulic steering system
Rotary weed and line cutter
Rotatable lifting surface device having selected pitch...
Rudder attachment for trolling motor
Rudder propeller with nozzle
Rust preventive treatment method for aluminum basis material and