Mercury - Fuel Filter 9.9-30hp EFI Series Marine-Grade Construction 8M0134466. Overview. Every small outboard has a story behind it - a dinghy ride at sunrise, a slow troll across a quiet lake, a long run toward the flats that always feels a little magical. No matter where you take it, you want an engine that fires cleanly and keeps running without hesitation. That's where the Mercury Marine part 8M0134466 fuel filter makes a difference. It's a small part, sure, but it carries big responsibility