Rubuta ci gaba don wannan sakin layi - A matsayin dan wasa guda, Coulthard ya lashe lambar azurfa a 1977 Golden Spin na Zagreb da kuma taken kasa na Australiya a lokacin kakar 1979 <unk> 1980. Ta gama 28th a gasar zakarun duniya ta 1979
a Vienna, Austria, kuma na 24 a gasar zakarun duniya ta 1980 a Dortmund, Jamus ta Yamma. Ostiraliya ta zaɓi kada ta aike ta zuwa wasannin Olympics na 1980, wanda ya kai ta ga yanke shawarar canzawa zuwa horarwa.