Troy-Bilt Mustang Z46 725cc Zero-Turn Rider. Mustang Z46 725cc Zero-Turn Rider – 17ARFACTA66. Powerful 22 HP/725cc KOHLER twin-cylinder engine designed to deliver quiet, balanced performance. Full-length, fully welded, 2 in. Dual hydrostatic transmissions deliver true zero-turn performance and are designed to help quickly cut and maneuver around obstacles while mowing. Twin blade cutting deck with two anti-scalp deck wheels helps prevent turf damage and is engineered to deliver a clean, even cut. 8 in x 5 in. WHY OUR CUSTOMERS KEEP SHOPPING WITH US. SECURE & HASSLE FREE SHOPPING. We are available 7 days a week. All corded products are designed to work with North American 110/120V outlets only.