8M0230859 - Quicksilver Ignition Coil for 2-Stroke Outboards. Overview. The 8M0230859 Quicksilver Ignition Coil is a genuine OEM replacement built for select 2-cycle Mercury and Mariner outboards, as well as compatible MerCruiser applications. This critical ignition component converts low voltage into the high-energy spark required to ignite the air-fuel mixture, helping ensure dependable starts and smooth engine performance.. Manufactured to Mercury Marine original equipment specifications, this coil is designed to restore proper ignition function and maintain consistent operation under demanding marine conditions. Ideal for replacement or routine maintenance, it helps keep your outboard running strong and responsive.. Key Features. Genuine Mercury / Quicksilver OEM Part: Produced to factory specifications for proper fit and performance.. Designed for Select 2-Cycle Outboards: Compatible with various Mercury and Mariner models (confirm with your service manual).. Reliable Spark Output