Mercury - Fuel Line Assembly 8-Foot Fuel Supply 32-8M0061083. Overview. This 8-foot fuel line is the kind of replacement most boaters end up needing sooner or later, especially when the old line gets stiff or starts seeping fuel. It's built to handle the usual sun, heat, and bending that portable tanks go through, and it stays flexible instead of turning brittle after a season. The primer bulb has a solid feel and moves fuel with just a couple of squeezes. It's a simple, dependable setup that ma