There is no mention of the hours requirement for F/O's in post No 2 by Yebo.
Many agencies are asking 300 to 500 hours on type but this below from PPJN, gives a different story.
FO Current Medical CPL, FRTO, COP/RTR and IR with multi engine endorsement and minimum of 250 hrs as Co-Pilot on any commercial jet (Boeing 737, 727, CRJ e.t.c) or minimum of 500 hrs as Co-Pilot on any commercial turboprop ( Hs748, F-27, ATR, Dornier, e.t.c). or minimum of 750 hrs on any Jets. Preference will be given to experience / rating on heavier class of jets and commercial jet experience. 13/Jul/06
BR. 
It would appear that the above requirement is straight from the Kingfisher Website.