Tiller outboard propeller accidents similar to the one involving John McGarrigle. These involve Mercury Marine tiller outboards or outboards for which the manufacturer is yet to be determined.
Houseboat Propeller Regulation Proposed and Withdrawn by USCG: Analysis by PGIC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