Mercury - NGK LFR6A-11 V-Power Spark Plug Ignition System Component Nickel Alloy Electrode 881284Q. Overview. Every smooth start begins long before the key turns. It starts with a spark plug you can rely on-one that fires clean, fires strong, and keeps your engine running the way it should. The NGK LFR6A-11 V-Power Spark Plug, offered as Mercury Marine part number 881284Q, is one of those quiet essentials that boaters come to trust. When you are easing away from the dock at sunrise or trimming u