Question about Husqvarna Zero Turn Mower Z5426

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Runs good for about an hour, then needs 15-30 minute rest period

2003 Z72 Commercial Husqvarna with 26 hp air cooled Kohler gas engine. Lately it will run perfect for an hour or so, then just cuts off. After sitting for 20-30 minutes, it will start and run for another hour or so, and so on. I have noticed that when it quits, both inline(clear) fuel filters are empty. I have replaced both small fuel filters from the tanks to the inverter valve, as well as the big fuel filter from the fuel pump to the injection site. No change. Any ideas?

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When it's about to quit, quickly undo the gas cap. If it roars back to life, you have a vacuum problem, where the vents aren't letting air into the gas tank to replace the used fuel, so after a while, gravity isn't sufficient enough to pull gas from the tank until is sits and equalizes for a while.

Posted on Jun 30, 2009

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Kerry Maloney's suggestion started me on the correct track when my Craftsman DGS 6500 cut out twice for no reason. There were no symptoms, I looked here then called Sears help line and they confirmed the vacuum issue. They are sending me a new gas cap, the tech also suggested taking lp air and blowing the dust/mud out of the vent hole to clear it. Or, if there is no hole, take a very small drill bit and make a hole in the middle of the gas cap.

Posted on Sep 19, 2009


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