Outdoor Power Equipment, Parts, and Service. Weingartz is excited to welcome Commercial Lawnmower customers into the Weingartz family. Same great people and service with extended offerings including 7 Year Enhanced Protection Program, Zero Down Time, Loyalty Program, At-Home Maintenance, and The Weingartz Advantage Program. Weingartz, family owned and operated, began in 1945 as a farm supply store for local Michigan families. In the 1970s, we began to focus exclusively on outdoor power equipment. Over time, we morphed into the “power equipment superstore” that now defines all of our locations.