Fellow gardeners, Just want to pass on a little promo for a product that really helped me. One of my riding mowers was surging really bad, enough to make you almost seasick. It was terrible. Worse yet, I only had 30 hours on the machine. Anyway, I talked to the shop where I bought the machine, and of course, fuel issues are not under warranty. But the head repair man walked me down to the isle of gas additives and told me that he had heard good feedback from some customers with similar problems on their poor running machines. He suggested I try out a product called Star Tron.
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So, having not much to lose, I bought a bottle. I added it to my gas can and filled up the tank on my mower, At first, no difference, after an hour, somewhat better, and after two hours the engine was no longer surging. It now runs like brand new. Whatever stuff is in that Star Tron, it cleaned out my carb and the engine just purrs now.

I guess I'm turning into my dad, when a good riding lawn mower is all it takes to make me happy.....