CyClone RT2E Modern 250 User Manual page 39

Maintenance
Spark plug inspection and adjustment
Remove the spark plug. If the spark plug insulator skirt is grayish white, it means the engine is overheated. This is because the spark plug
has a low heat value or the spark plug is screwed in too long. You should replace the spark plug with the same model. If the spark plug
insulator is dark black or has serious oil stains and dark black carbon deposits on the surface, it means the combustible mixture is too
rich. You should clean the air filter. If the spark plug insulator skirt is brown, it means the engine is burning normally.
. 38 .
(0.8~0.9)mm
Spark plug model: CR8EH-9
Spark plug gap: 0.8~0.9mm
Spark plug torque: 17.5Nm (1.75m.kg)
When cleaning the spark plug, soak it in cleaning agent or gasoline for half an hour, then use a non-metallic
scraper to clean the carbon deposits around the spark plug. Before installing the spark plug, measure the spark plug
electrode gap with a thickness gauge and adjust the electrode gap to the specified value. Clean the gasket and tighten
the spark plug to the correct torque.