Bought a slightly used snapper pro a few months ago with 9hrs. Now with 20 hrs several times after shutting it off will not restart for a while not matter what I do. When it does it stumbles for a few seconds then clears up running fine. Immediately after trying to start it I smell gas. I have removed plugs which werent wet and turned motor over to blow out any gas. Was getting great spark on both plugs. Starting fluid doesnt help either. Happened earlier today and my brother tried to start if after 30 mins of trying and happened to switch tanks and it started up and stumbled for a few seconds like it does after not starting and then ran fine. It has only done it when hot and can happen from 1 min to 10 mins from shutting it off hot. Just trying to get info before I bring it to the dealer for warranty repair.