1984 First Winchboat Patent Application In 1984, McCulloh took the first step in testing his outboard powered Winchboat equipped with the world’s first Portable Launch and Recovery System (PLRS). The PLRS comprised of a winch system, automatic canopy launching power mast, all of which was powered by a built-in 16hp diesel engine that could transform a standard boat into a winchboat.
The Johnson Outboards provided modified engines that included  custom transom brackets and external intake air ducts as promotional consideration to test their version of the OMC sea drive concept. 
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