Saipe Marine & RV Fuel Line Assembly 5/16" (8mm) 6.89ft — Ethanol-Ready Hose with Priming Bulb & Quick-Connects

Saipe's 5/16" (8mm) fuel line assembly is a 6.89 ft (2.1 m) outboard and RV fuel hose kit built for ethanol-compatible fuels with one-way flow, quick-connect fittings, and reinforced connectors to reduce leaks.

This fuel hose assembly is designed to replace or upgrade the supply line between portable tanks and outboard engines or RV fuel inlets. Constructed from low-permeation rubber that tolerates ethanol-blended gasoline, the kit combines a hand-priming bulb, directional flow marking, and snap-on connectors so you can install or remove the hose quickly without special tools. Reinforced metal springs at the connection points help protect the ends from kinking and premature wear while minimizing seepage.

How long is the hose and will it fit my boat or RV?

The Saipe assembly measures 6.89 feet (2.1 meters) and uses a 5/16" (8 mm) inner diameter with a 7/16" (12 mm) outer diameter, a common size for many outboards and portable tanks. It’s intended as a universal replacement for several brands but is explicitly not compatible with Suzuki or Mercury fittings without adapters.

• Length: 6.89 ft / 2.1 m for typical transom-to-tank runs
• Inner diameter: 5/16" (8 mm); outer diameter: 7/16" (12 mm)
• Works with many OMC, Johnson, Evinrude and Yamaha systems
• Adapters may be required for non-compatible brands

Is this hose safe for ethanol-blended fuels and how does it prevent evaporation?

The hose uses a rubber compound formulated for ethanol-blended gasoline and a low-permeation material to reduce fuel vapor loss. While no fuel hose is completely impermeable, this construction slows evaporation and helps maintain fuel integrity during storage and operation.

• Low-permeation rubber resists ethanol-related deterioration
• Material reduces vapor migration compared with standard hoses
• Reinforced ends lower risk of leaks at high-stress points
• Designed for marine and RV environments, resisting flex and wear

How do the connectors and one-way bulb work for quick installation?

The assembly includes snap-on quick connectors that let you attach or detach the hose from portable fuel tanks and outboard fittings with minimal effort. The integrated priming bulb has a clear directional arrow so you can immediately identify the inflow and outflow, ensuring correct orientation and reliable hand-priming.

• Snap-on connectors for tool-free tank and engine attachment
• Directional arrow on bulb indicates flow for correct installation
• Reinforced metal springs at hose ends prevent kinking and leaks
• Functions as a manual pump to prime the outboard when needed

What engines and applications are recommended, and what should I avoid?

This hose suits marine outboards, boats with portable tanks, RVs, caravans, and equipment like tractors that use similar 5/16" fuel lines. It’s compatible with many OMC, Johnson, Evinrude and Yamaha systems, but you should avoid using it with Suzuki and Mercury engines unless you have the correct adapter or manufacturer approval.

• Ideal for outboards, boats, portable tanks, RVs and caravans
• Compatible with OMC, Johnson, Evinrude, Yamaha fittings
• Not recommended for direct use on Suzuki and Mercury without adapters
• Also suitable for small tractors and equipment using 5/16" lines

Who this is for: Boaters, RV owners, and small equipment operators who need a dependable, ethanol-compatible fuel transfer line with a built-in primer bulb and quick-disconnect fittings. Choose this assembly if you want a ready-to-install replacement that minimizes vapor loss, reduces connection failures with reinforced ends, and offers the convenience of a hand-priming bulb for routine starting and engine maintenance.