Mercury Mariner Outboard Spark Plugs | SSI Marine UK

Explore our range of Mercury Mariner outboard spark plugs at SSI Marine UK. Quality replacement NGK and Champion spark plugs for compatible Mercury and Mariner 2-stroke and 4-stroke outboard engines. Designed to support reliable ignition, smooth engine starting and efficient performance. Ideal for routine servicing, maintenance and replacing worn spark plugs. Competitive prices, UK stock and fast dispatch from trusted marine specialists with over 10 years of experience.