[Bossman]

Have a 2013 Z600 sat for a month now fuel pump runs constantly and won't start because of flooding. Dealer can't look at for a month.

[NMKawierider]

I'm assuming the 600 is fuel injected. It has a stuck injector. Remove it and blast some carb cleaner back through it...tap it around lightly. Should run some injector cleaner through it afterwards. You can test it by just hooking it back up without installing it and turning the key on. Or just buy a new injector for it.

[Cosmosdan]

Could also try a noid to see if it's getting a signal to spray, or if it's a constant signal.