Walk Behind Lawn Mowers

I purchased a Husqvarna HU700F self propelled mower in November or 2014. I started using it the spring of this year. Used it about 8 times, now the mower won't start. Checked the gas, OK- checked for spark, OK- still won't start. I had a 15 year old Craftsman Riding Mower that started every time. I thought I bought a reputable name with the Honda motor. Guess I was wrong!!!