- Who
- Bob Wartinger
- What
- 284.14 kilometre(s) per hour
- Where
- United States (Parker, Arizona, Colorado River)
- When
The record for the fastest speed for an outboard motorboat is 284.14 km/h (176.556 mph) set by Bob Wartinger (USA) in a Karelsen make hull powered by a 3.5 litre Evinrude outboard motor on a stretch of the Colorado River near Parker, Arizona, USA, on 30 November 1989.
