SPARK PLUG Fits Powermore 5X65 Model Engines CAUTION: Disconnect spark plug wire before working on mower. Be certain engine is cold. How to install: 1. Using spark plug wrench, remove plug by turning counterclockwise. 2. Clean cylinder head threads if necessary. Install new plug, turning clockwise with fingers until snug. 3. Using wrench, tighten plug an additional 1/4 turn to fully seat gasket. 4. Reconnect spark plug wire.