Z254. Performance and style hit the grass running with Husqvarna Z200 series zero-turn mowers. These mowers are built to last, with reinforced steel cutting decks, premium integrated transmissions and an ultra-durable frame. And they're user-friendly, with a convenient control panel and spring-assisted deck lift system. If for some reason, your brake safety switch is bad or intermittent, it would shut the mower off when your brought your levers in, and a restart would be very much like a dead battery. Check this little switch, wiggle the wires that go into the back of it. Jump these wires it if that doesn't work. Bad Husqvarna Mower Tensioner Pulley on a Zero Turn. Tensioner Pulleys are often made from hard plastic with a bearing in the center. The pulley can break or the bearing can fail on a Husqvarna lawn mower. If you find a bad pulley, replace it with a new one. Make sure the belt is securely around the pulleys and inside the belt keepers. Performing these maintenance tasks aids in preventing hydrostatic drive problems and ensuring the smooth operation of your mower. Husqvarna recommends using 10w-30 non-synthetic engine oil for their hydrostatic transmissions. The oil should be changed after the first 50 hours of use and then every 200 hours thereafter. 5Waz.