This was a pretty timely post for me. I just picked up a bottle of Seafoam and I put a glug in all of my 2 and 4 stroke engines---dirtbike, chain saws (3), leaf blower, brush cutter, rototiller, splitter, pressure washer and my Kubota. I was having all kinds of trouble a few years back with the Kohler engine on my splitter. I had been in touch with Kohler several times and the tech recommended Seafoam. That engine puked after about a year and they covered it under warranty. About another year later, the replacement engine took a crap and was out of warranty by then (2 engines in a little over 2 years), so I just picked up a Predator at HF and it's been pretty flawless, especially compared to the Kohlers. I hadn't started the Predator in 4 months but it's that time again and this week I went out and gave that Predator a tug and she kicked off on the 1st pull. I'm running 90 octane non-ethanol with a splash of seafoam. To get away from the ethanol issues, I was running avgas 100, but I wondered if the lead wasn't causing some issues. When the 1st Kohler crapped out, a valve stuck. The 90 octane non-ethanol is a lot cheaper and I probably don't need the lead in these engines that weren't designed to run it. Kohler didn't think it was an issue in the 1st engine's failure but who knows…