Tries: Arthur, Briscoe, Litten 2, Bailey, Martin, Hardaker, Cust, Aydin Goals: Hardaker 7
Hull FC reacted to the loss of head coach John Cartwright with a dominant nine-try thrashing of Castleford Tigers.
The Tigers shocked Wigan Warriors on their own turf last week to lift themselves off bottom spot, but they quickly reverted to the ill discipline and flimsy defence which had led to them propping up the rest of Super League.
Hull parted company with Cartwright last week after St Helens had inflicted a second successive defeat, but they were on top from the start, as tries from Jake Arthur, Tom Briscoe, Davy Litten and Connor Bailey had them out of sight by half-time, with Krystian Mapapalangi conjuring up the Tigers' only reply.
Hull gave interim coach Andy Last, in charge until the end of the season, a great start by adding second-half tries from Lewis Martin, Litten, Zak Hardaker, Bailey, Cade Cust and Yusuf Aydin as Mapapalangi grabbed his second from a rare forward foray by Cas.
Castleford: Windley; Ravalawa, McIntosh, Mapapalangi, Qareqare; Asi, Weaver; Atoni, Lane, Lawler, Hirst, Mellor, Stimson.
Hull FC: Moy; Briscoe, Newman, Litten, Martin; Arthur, Sezer; Sao, Bourouh, Hill, Bailey, Hardaker, Bell.
Interchanges: Cust, Aydin, Fash, Mata'utia, Kemp.
