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|guy||My 425 recently began fouling plugs after only a few hours. No previous problems. I have changed air filter, cleaned grass from all screens. Reconnected PCV hose which was not in place, changed the oil (which was a little overfilled). Plugs are very sooty and black indicating a rich mixture. After changing plugs, starts and runs fine for a few more hours until it begins to run poorly due to spark plug fouling.
Is it time for a carb to be rebuilt? Does not seem to be a main mixture adjustment only low, high and low idle mixture. Help
|Dave||I have tghe same problem. Any suggestions
|Guy Cline||I am not sure what solved my problem but I did the following. Hope it helps you.
Changed the Oil