Spark Plugs are a key part that helps maintain petrol power in a machine. However if you didn’t know, STIHL NGK spark plugs have slight differences to a standard NGK spark plug regardless of the same part number. The reason being that they are designed for Stihl machines only, creating the best possible performance.

Key Differences STIHL NGK spark plug (right) and the off the shelf NGK plug (left) are:

• The union nut (1) of a STIHL spark plug is fixed in place. This ensures there is no spark gap affecting performance or potentially igniting gasoline fumes.
• Interference suppression resistance (2) is tuned to STIHL machines for the optimal spark and efficiency, protecting the machine’s ignition module from early failure.
• Sealing ring (3) is coated for better contact and corrosion resistance, especially in harsh and damp environments.
• The electrode gap (4) is aligned to STIHL products for optimal compression

Therefore Stihl recommends that you always use the STIHL NGK spark plugs.

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