Well, I just ordered a new $17.88 carb from Amazon for my Troy Bilt with Briggs 550EX "no start" engine. We'll see what happens! Also, I switched over to ethanol-free fuel after the last trip to the small engine guy & that did not fix my yearly spring no-start problem, AND I do use Sea Foam every fall. (I hardly ever use the mower)
This thing has been nothing but a POS ever since it was new. I maybe have 6 hours on it.
Seafoam is for use during the summer season not winter prep. Stabile fuel treatment is for winter storage.