![]() ![]() ![]() This happens due to the increased engine temperature, which widens the electrode gap and weakens the strength of the generated spark output.Ī defective spark plug frequently generates a misfire or strained sound in an engine cylinder. Insufficient Engine Performance or Failure:Įven if your mower engine starts after several attempts, it will not run for an extended period due to a faulty spark plug and will either die out or cease mowing. If you continue to start the mower in this situation, the engine will flood, inflicting more damage to the mower’s key components. The more fuel there is, the more difficult it will be to start the engine. This signifies that the spark produced by the spark plug is insufficient to ignite the fuel and air mixture in the cylinder.Įvery time you try to start the engine, more fuel is poured into the cylinder. But what if your mower requires many more pulls of the starter pull cord to fire up the engine or won’t start even after you turn the key several times? Hard starting is usual as the mower ages. If the spark plug is faulty, it will not produce the necessary spark for proper combustion.Īs a result, the combustion will not propel the piston within the engine to fire up, resulting in the no-start or hard start problem. The engine of a lawn mower relies on the spark from the spark plug to ignite the aerosolized fuel that enters the combustion chamber. No starting or hard starting is the most common and evident sign of a lawn mower’s bad spark plug. ![]()
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