Walk Behind Lawn Mowers

I purchased a 4wheel drive walk behind mower which is still under warranty. I have taken it back to Lowes for repair two different times. once because the gas leaked out while in use; and most recently because the air filter constantly fell out, it would not pull up a hill and would frequently just stop running and would not crank again for 30 to 40 minutes. Lowes fixed the air filter issue by replacing the original air filter part. But they did not address the other issues and it still has the same problems. My mower Serial #4401828408 ; model #961450015; 22" AWD . For the first two years, it was a great mower, but after that it was problem after problem. and I cannot get Lowes to fix it properly. Can Husqvarna help?