Powerboat Magazine Performance Reports
Volume 14/Number 5/March 1982 page 67
1982 Fountain Executioner 10 Meter
Reported top speed on radar 86MPH
From what I remember those old Fountains had a huge pad that was 17"-18" wide
Tantrum, Merc made a turbocharged 454 that was rated at 475hp in the early to mid 80's.