McMahon (shown below with Johnny Carson) had been battling pneumonia and other illnesses.
Outgoing, affable and possessing a robust, baritone voice, McMahon began his career with stints as a bingo caller, carnival barker and boardwalk pitchman before becoming a broadcast announcer and TV host.
Trained as a U.S. Marine fighter pilot during World War II, he flew missions in Korea in the 1950s.