The boy's 420 competition at the 2017 Youth Sailing World Championships took place in Sanya, China, between 9 and 16 December 2017. Otto Henry and Rome Featherstone of the Australia won the event.

Results +PosHelmCrewCountryR1R2R3R4R5R6R7R8R9TotalNett1Otto HenryRome Featherstone4221(15)13111352372Thomas RiceTrevor Bornarth391594210(11)54433Ido BilikNoam Homri21915136(18)964464Enzo BalangerGaultier Tallieu8(21)7413175268475Rasim YasarAtil Api7(20)1621010361286666Yannis SajeLukas Haberl1386175195(20)194747Nicolas RadovitzkyMartin Radovitzky176812(18)2916492748Ramiro CosentinoAgustin Frers De Anchorena111015(16)47118890749Seweryn WysokinskiMateusz Jankowski12239616171(25)1007510Edoardo FerraroFrancesco Orlando9141211(22)1414461068411Andre FiuzaErik-Gunnar Rebelo Hoffmann1411(20)3198202101078712Carlos BalaguerAntoni Massanet Ramis16542121210(27 RET)191168913Nick ZeltnerTill Seger(27 DNF)3131832541971199214Patrick WilsonArie Moffat1016148145199(21)1169515Shinnosue HachisukaBenkei Kano5151014891521(24)1219716João Tomás Colaço BolinaRafael Rodrigues124519722(27 UFD)327 UFD1269917Alex SmallwoodRoss Thompson618216(23)1113151412710418Changhang FanZinan Li151219101161813(22)12610419James BarnettSam Street21(24)177121712121613811420Wonbin ChoiWoojin Kim(27 UFD)7182416181671715012321Geoff PowerJames McCann18192220(24)20814515012622Benji DanielRivaldo Arendse1917231317(24)24171516914523Evgenii ChesovAkim Papyshev201324232521(27 UFD)231318916224Benjamin FuenzalidaMarcos Fuentes2323(26)22201521242019416825Ping-Yu ChengHsiu-Fung Chiang(27 DNF)251127 DSQ262622221820417726Jose Aguilera PalaciosBruno Acierno22(26)25252123232523213187 Source:

References