The simple way to check is to remove the starter and try to turn the flwheel by hand, it sounds more like a starter issue, this machine has a soft start, it winds up a second spring in the starter, which when it over comes the engine compression it helps to spin the engine over. If the spring ends have straightened out it will not turn the engine over at all, this is where i would be looking.
Husqvarna man, February 2010