If you need a spark plug for your small engine, such as in a mower or generator, try these nickel-plated copper NGK spark plugs. They feature trivalent metal plating, corrugated ribs to prevent flashover, and are triple-sealed. The spark plug is an essential component of the engine and they should be regularly checked and replaced to ensure optimum performance. This plug is equivalent to Champion RN9YC. For assistance in selecting the right spark plug, contact your local Supercheap Auto store and speak to one our friendly team members.