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An anti-dieselling valve

An anti-dieselling valve Carburettor body Anti-dieselling valve

Explained in

    Curing running on

    Running-on is when the engine continues to turn after you've switched off the ignition because the fuel/air mixture is being ignited by a hot-spot in the combustion chamber. Furthermore, because the mixture is often firing at the wrong point in the cycle, the engine does not run smoothly but jerks and rocks badly on its mountings (and sometimes backfires). The problem can be so bad that the engine runs on for a minute or more if left alone. Read more