8.625 x 4.5 Oval Air Fil ter Marine Flame Arrest

The 8.625 x 4.5 oval air filter marine flame arrestor from K and N Engineering is a critical safety and performance component for inboard and outboard marine engines. Whether you're running a center console offshore or a cabin cruiser on inland lakes, this flame arrestor prevents backfire flames from exiting your carburetor while maintaining optimal airflow to your engine. Built by K and N—a trusted name in filtration for decades—this oval-profile design fits the engine compartments of most modern recreational boats without requiring extensive modifications.

Marine flame arrestors work by forcing incoming air through a fine stainless-steel mesh screen that cools and disperses any flame attempting to travel backward into the fuel system during a carburetor backfire. The 8.625 x 4.5 oval configuration is engineered to match standard marine carburetor flanges, ensuring a secure seal while minimizing restriction to engine breathing. K and N's marine-grade construction resists saltwater corrosion and maintains consistent performance across freshwater and coastal environments. The compact 1.52 lb unit installs directly onto your existing intake, requiring no special tools or engine modifications.

This flame arrestor is essential for any boater prioritizing engine safety and longevity. It's particularly valuable if you've upgraded your carburetor or fuel system, as backfire risk increases with performance modifications. Installation takes minutes—simply align the oval profile with your carburetor opening and secure with the provided mounting hardware. Regular inspection and occasional cleaning of the mesh screen (every 50–100 operating hours in saltwater conditions) keeps it functioning at peak efficiency. Anglers and cruisers who depend on reliable engine starts and smooth idle characteristics will appreciate the peace of mind this K and N component delivers on every trip to the water.