Compatible COLEMAN Generator Pulse 1850, Pulse 1855, Sport 1851, Ultra 2500 Spark Plug. Quantity: 2 Compatible with Champion RJ19LM & NGK BR2LM Spark Plugs High durability spark plug that keeps your small engine running in optimum performance. Premium quality materials resist fouling and corrosion. Superior conductivity for consistent voltage and long life. Stable operating temperature guarantees heat control under a variety of loads. Improves engine start, performance, fuel efficiency, stability and extends engine life. Damaged or worn spark plug that can cause major engine damage if not changed. Replace your spark plug if your engine is difficult to start, misfiring or unstable idle. This product is not affiliated with any OEM brands and is not covered under any warranties offered by the original manufacturers. Warranties for this product are offered solely by Upstart Components.