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Thank you John Bosher, Quinno’s Quick Snaps and Trent Duvall for the use of your awesome photos.

This site was last updated on the 9/8/21

E.C Griffith


First won by ‘Fairchild’ in 1910

Race Classes - OUTBOARDS

Outboards can also be easily recognised by the everyday person, as they are loosely based on outboard ski boats. Again, obviously designs and construction materials are quite different to your average "eggbeater".

Outboards are generally separated into "monos" and "tunnels". Monos being the more common mono (meaning one) or "vee" style of hull you can relate your ski or fishing boat to. Tunnels are similar to hydroplanes as they also rely on an air trap of tunnel to create the air pressure needed to help these boats ride on top of the water. Tunnels differ from hydroplanes in the fact that the air traps extend to the full length of the hull

The Outboard classes range from 25hp up to Unlimited Outboards and the world wide based class of the Formula 1 tunnel boats.


These classes are the most active outboard classes in Australia at this time:

Yamato OSY400A Open Hull

25hp Open Hull

550cc Supersports

800cc Open


Formula 4

Formula 3

Formula SST120

Formula 2 (Opti)

Formula 1