I was never a believer of snake oils, but now I am. The cub cadet rider was surging real bad so I decided to change the oil and all the filters and give it a tune up while I was there. Got all done and fired it up, still surging. As I was sitting there aggravated I remembered I bought a can of sea foam awhile back because I seen some of you guys talk highly about it. So put some in the oil and some in the gas and fire it back up. After about 10 minutes of sitting there still surging it started getting better, then with in 20 minutes its running like a top. WOW! the stuff works. Thanks guys.