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I yanked the carb off and their is only one opening into the intake manifold. Also there is only one opening out of the bottom of the carb. This would make the carb a single barrel, yes? That is why I am confused as to why this is only happening to one cylinder. Is it possible that it could be an ignition problem?
Hey eightwheeler. How often do you have to replace the park plugs in your FD620D? You said it was a common problem, to "spit plugs." Do experience exactly what I am experiencing with the center electrode burning up and melting yet the rest of the plug looks fine, ie. porcelain is not craked nor blistered and ground electrode looks just fine. I cleaned the carb ultrasonically and put it back together. Notice that it idles a little slower which makes it easier to get into gears, but haven't had a chance to take it out for a load test. Have you tried running cooler rated plugs?
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