Sierra Silverado 4000 Outboard Fuel Line - Available in 5/16" and 3/8" ID, 10' to 50' Lengths

The Sierra Silverado 4000 Outboard Fuel Line is a marine-grade fuel hose built for above-deck primer bulb fuel line applications on outboard-powered boats. It meets SAE J1527 Type B1-15 and is EPA and CARB compliant, and it is resistant to ethanol-blended fuels, making it a safe choice for modern pump-blend gasoline. Construction uses a THV barrier layer to block fuel permeation, a Nitrile jacket, polyester reinforcement for strength, and a weather- and UV-resistant CPE cover. The gray cover is designed to keep the hose cooler and helps prevent vapor lock in the fuel line. This hose is not fire retardant, so it is intended for above-deck use rather than below-deck engine compartment routing.

The Silverado 4000 line is offered in two inside diameters, 5/16 inch and 3/8 inch, so it covers the fuel line sizing used across a wide range of outboard fuel systems. Each diameter is available in multiple put-up lengths, from a 10 foot polypac coil for smaller repairs to 25 foot and 50 foot cartons for larger installations, rigging shops, and multi-boat fleets.

Specifications

• Brand: Sierra
• Manufacturer Part Number: 16-337
• Product Type: Outboard fuel line / marine fuel hose
• Material: Polyester reinforcement, Nitrile jacket, THV barrier layer, CPE cover
• Color: Gray
• Standard: Meets SAE J1527 Type B1-15
• Compliance: EPA and CARB compliant
• Fuel Compatibility: Resistant to ethanol-blended fuels
• Application: Above-deck primer bulb fuel line applications
• Fire Retardant: No
• Available Inside Diameters: 5/16 inch, 3/8 inch
• Inside Diameter - 5/16 Inch Size: 5/16 inch (7.9 mm)
• Outside Diameter - 5/16 Inch Size: 1/2 inch (12.75 mm)
• Inside Diameter - 3/8 Inch Size: 3/8 inch (9.5 mm)
• Outside Diameter - 3/8 Inch Size: 35/64 inch (13.72 mm)
• Available Lengths: 10 feet, 25 feet, 50 feet

Sizes & Options

First pick the inside diameter that matches your boat's existing fuel line or primer bulb fitting, 5/16 inch or 3/8 inch. Then choose the length you need: the 10 foot option ships as a coiled polypac, ideal for a single repair or short run, while the 25 foot and 50 foot lengths ship as reel-off cartons suited to full rigging jobs or stocking multiple repairs. Every size and length uses the same Silverado 4000 construction, so performance and compliance are identical across the line.

Frequently Asked Questions

What sizes does the Sierra Silverado 4000 outboard fuel line come in? This fuel line is available in two inside diameters, 5/16 inch and 3/8 inch, covering the fuel line sizing used on most outboard fuel systems.

What lengths can I order? The Silverado 4000 line ships in 10 foot, 25 foot, and 50 foot lengths, so you can buy a short coil for a single repair or a longer carton for a full rigging job.

Is this fuel line safe for ethanol-blended gasoline? Yes, the Silverado 4000 hose is resistant to ethanol-blended fuels and includes a THV barrier layer to prevent fuel permeation through the hose wall.

What standards does the Sierra Silverado 4000 fuel line meet? It meets SAE J1527 Type B1-15 and is EPA and CARB compliant, the standards that apply to marine fuel line hose.

Is the Silverado 4000 fuel line fire retardant? No, this hose is not fire retardant. It is designed for above-deck primer bulb fuel line applications rather than fire-rated engine compartment routing.

What is the Silverado 4000 fuel line made of? Construction includes a THV barrier layer, a Nitrile jacket, polyester reinforcement for strength, and a weather- and UV-resistant CPE cover over a gray outer jacket.

Why is the hose gray instead of black? The gray CPE cover on the Silverado 4000 fuel line is designed to keep the hose cooler than a black hose and helps prevent vapor lock in the fuel system.

Should I order the 10 foot polypac or a 25/50 foot carton? The 10 foot length ships as a coiled polypac and suits a single hose repair, while the 25 foot and 50 foot lengths ship as reel-off cartons for full rigging jobs or stocking several repairs.

How do I know whether I need 5/16 inch or 3/8 inch fuel line? Match the inside diameter to your boat's existing fuel line or primer bulb fitting; the Silverado 4000 line is offered in both 5/16 inch and 3/8 inch inside diameter to fit either setup.

Does this fuel line come with fittings or clamps? No, the Silverado 4000 outboard fuel line is sold as hose only, by length, and does not include fittings or clamps.

Is this a genuine Sierra part? Yes, this is a genuine Sierra Silverado 4000 outboard fuel line, part number stem 16-337, not a generic aftermarket substitute.