How to replace the spark plug on the RGPM 51 S?

Q: How to replace the spark plug on the RGPM 51 S?

Before any intervention, stop the engine and let it cool completely , then remove the spark plug connector by pulling it firmly. This step is essential for your safety. The Briggs & Stratton 190 cm³ engine of your Einhell RGPM 51 S uses a Briggs & Stratton 591868 spark plug or its equivalent Champion RJ19LM . The spark plug wrench (21 mm) is provided with your mower. Proceed as follows: Locate the spark plug on the single-cylinder engine Use the provided spark plug wrench to unscrew the old spark plug by turning counterclockwise Inspect the condition of the spark plug: if it is heavily sooted, caked, or worn, proceed with the replacement Check that the electrode gap of the new spark plug is set between 0.20 and 0.30 mm (you can use a feeler gauge or refer to the Briggs & Stratton manual) Install the new spark plug and tighten it firmly by hand, then finish tightening with the wrench without excessive force (about 2 to 3 turns of the wrench after contact) Reconnect the spark plug connector by pushing it until you hear a click For optimal performance, it is recommended to replace the spark plug once a year. If the mower does not start after replacement, ensure that the connector is properly connected and that there is no play.

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Accepted Answer

Before any intervention, stop the engine and let it cool completely, then remove the spark plug connector by pulling it firmly. This step is essential for your safety.

The Briggs & Stratton 190 cm³ engine of your Einhell RGPM 51 S uses a Briggs & Stratton 591868 spark plug or its equivalent Champion RJ19LM. The spark plug wrench (21 mm) is provided with your mower.

Proceed as follows:

Locate the spark plug on the single-cylinder engine
Use the provided spark plug wrench to unscrew the old spark plug by turning counterclockwise
Inspect the condition of the spark plug: if it is heavily sooted, caked, or worn, proceed with the replacement
Check that the electrode gap of the new spark plug is set between 0.20 and 0.30 mm (you can use a feeler gauge or refer to the Briggs & Stratton manual)
Install the new spark plug and tighten it firmly by hand, then finish tightening with the wrench without excessive force (about 2 to 3 turns of the wrench after contact)
Reconnect the spark plug connector by pushing it until you hear a click

For optimal performance, it is recommended to replace the spark plug once a year. If the mower does not start after replacement, ensure that the connector is properly connected and that there is no play.

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