Yamaha Mexico with Corona in their display booth, probably at a fishing tournament. Captured 10 February 2014 from IMEMSA site.
Houseboat Propeller Regulation Proposed and Withdrawn by USCG: Analysis by PGIC
History of Boat Propeller Safety
Mitigating Boat Propeller Injuries & Fatalities Chart
Four Volume Review of the Boating Industry’s Boat Propeller Guard Product Liability Defense