42" (1067 mm) cut Gravely ZT 42 (915148 models with serial # 000101 ‑ 009999, 010000 ‑ 029999, 030000 ‑ 034999, 035000 and onwards and 915178 models with serial # 000101 ‑ 034999, 035000 ‑ 044999, 045000 and onwards) zero turn ride on lawn mower models