Sierra 18-8016EP-2 Fuel Line Assembly, Mercury/Mariner, Replaces 32-858109Q12, 3/8 Inch x 8 Foot

The Sierra 18-8016EP-2 is a complete EPA-compliant fuel line assembly built for Mercury and Mariner outboard and sterndrive fuel systems. It is sold as the SILVERADO 4000 Premium fuel line, a full 8 foot length of 3/8 inch hose ready to connect your fuel tank to the engine without cutting and clamping raw hose stock. The assembly uses a premium rubber construction with a polyester braid reinforcement layer, a weather-resistant CPE outer cover, and a flexible THV barrier layer on the inside. This layered construction resists kinking when routed through tight bilge and transom spaces, holds its shape under vibration, and is designed to be easy to trim and clamp during installation. The white outer jacket matches factory-style Mercury fuel line coloring.

This fuel line assembly directly replaces OEM Mercury fuel line 32-858109Q12 and 32-858109K12, making it a straightforward swap for boats originally equipped with that factory line. It measures 96 inches (8 feet) in length with a 0.38 inch outside diameter, giving installers enough length to route from tank to engine on most standard runs, with excess trimmed to fit. Because it is sold as a complete assembly rather than bulk hose, it is intended to be installed as-is rather than cut into custom lengths.

Specifications

• Brand: Sierra
• Manufacturer Part Number: 18-8016EP-2
• Product Name: EPA Fuel Line Assembly - Mercury
• Fitment: Mercury / Mariner
• Hose Size: 3/8 inch (9.5mm)
• Assembly Length: 8 feet (96 inches / 2.4m)
• Outside Diameter: 0.38 inches
• Color: White
• Material: Polyester, Rubber
• Weight: 2 pounds
• UPC: 808282369569

Fitment

• Mercury / Mariner fuel systems using 3/8 inch fuel line

Replaces (OEM)

• 32-858109Q12
• 32-858109K12

Frequently Asked Questions

What does the Sierra 18-8016EP-2 fuel line assembly fit? The 18-8016EP-2 is built for Mercury and Mariner fuel systems that use 3/8 inch fuel line, and it directly replaces the factory Mercury fuel line.

What OEM part numbers does this fuel line replace? This assembly replaces Mercury OEM numbers 32-858109Q12 and 32-858109K12.

How long is the 18-8016EP-2 fuel line? It is a complete 8 foot (96 inch) assembly, so it comes pre-cut to that length rather than sold as bulk hose.

What is the inside hose size? The hose size is 3/8 inch, listed as 9.5mm, with an outside diameter of 0.38 inches.

What is the fuel line made of? The Sierra 18-8016EP-2 uses a premium rubber construction with a polyester braid layer, a weather-resistant CPE cover, and a flexible THV barrier layer for fuel resistance.

Is this fuel line resistant to kinking? Yes, the polyester braid and CPE cover on the 18-8016EP-2 are designed to resist kinking while remaining easy to clamp during installation.

What color is the 18-8016EP-2 fuel line? It has a white outer jacket, matching the factory-style Mercury fuel line appearance.

How much does this fuel line assembly weigh? The Sierra 18-8016EP-2 fuel line assembly weighs 2 pounds.

Can this fuel line be cut to a shorter length? The 18-8016EP-2 is sold as a complete 8 foot assembly and can be trimmed shorter during installation to match a specific run, since some excess length is included.

Are fuel connectors included with this assembly? No, fuel and tank connectors such as those used with Mercury fuel systems are sold separately from the 18-8016EP-2 fuel line assembly.

Does this replace the original equipment Mercury fuel line? Yes, the 18-8016EP-2 is a direct replacement for the original Mercury fuel line identified by OEM numbers 32-858109Q12 and 32-858109K12.

Is this a genuine Sierra part or aftermarket? The 18-8016EP-2 is manufactured by Sierra as an EPA-compliant fuel line assembly designed for Mercury and Mariner applications.