Mercury - Fuel Line Assembly for Select Mercury, Mariner and Force Outboards Fuel System Low-Permeation Gray Hose 8M0061892. OverviewIf you have run boats long enough, you know that a fuel line can make or break a day. When it is right, you squeeze the bulb a few times, the engine lights, and you forget about it. When it is wrong, you are stuck at the dock or drifting while everyone looks at you like, "So… now what?" This Mercury Marine part is built for the first kind of day. The Mercury 8M0061