Toro Z Master (72923) 5000 Series Rear Discharge 60"Description Z Master 5000 Series mowers offer rear discharge decks for increased productivity in taller grass. These EFI models also use up to 25% less fuel than equivalent non EFI mowers. The rear discharge design allows operators to trim on either side of the deck no need to change direction to avoid discharging debris on roadways, sidewalks or flowerbeds. Clippings are dropped within the path of the mower, saving time and cleanup. The Tweel Turf