Troy-Bilt Mustang Z54 XP 725cc Zero-Turn Rider. Mustang Z54 XP 725cc Zero-Turn Rider – 17ASFAC3A66. Powerful 24 HP/725cc KOHLER PRO twin-cylinder engine designed to deliver quiet, balanced performance. Fabricated steel cutting deck is designed for durable performance in heavy mowing conditions and has 2 Anti-scalp deck wheels, plus nose roller to help prevent turf damage. Full-length, fully welded, 2 in. Dual hydrostatic transmissions with lap bar control deliver true zero-turn performance and are designed to help quickly cut and maneuver around obstacles while mowing. High-back seat with arm rests and foam-grip steering controls help provide a comfortable ride. 8 in x 6 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.