I was wrong about Sea Foam
I have to admit it, I was dubious about the claims of Sea foam being so special. Well, I tried it on a couple of old neglected machines that had been given to me but I couldn't get running with regular carb cleaner. I simply dumped some sea foam in the inlet, let them rip, and within a couple of pulls both old crummy engines started up.
I just bought a case on Amazon.