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.
Aspects of the Propeller Safety Debate chart
Houseboat Propeller Regulation Proposed and Withdrawn by USCG: Analysis by PGIC
History of Boat Propeller Safety
Mitigating Boat Propeller Injuries & Fatalities Chart