Exmark Used TTS541KA523 Commecial Walk Behind TR3391UCERT is a 2013 with a Kohler EFI engine and 52" Series 4 deck. With speeds up to 6.75 mph, it ranks among the most productive mowers in it's class. This product is Weingartz Certified Pre-Owned. This means you get the added piece of mind of a machine that has been thoroughly inspected and repaired by our expert technicians and includes a 90-day warranty. Only the best used equipment meets the Weingartz Certified Pre-Owned standards.