iFJF 5/16in x 10ft Outboard Fuel Line Kit with Primer Bulb — Yamaha Compatible, UV-Resistant Rubber

The iFJF 32-858104K08 is a 5/16in x 10ft outboard fuel line kit with a rubber primer bulb and check valve, made to replace OEM lines on many Yamaha-compatible marine engines.

This fuel line assembly is designed for small to mid-range outboard motors and aftermarket external fuel tank setups. Built from flexible rubber that resists UV, ozone and alcohol-enhanced fuels, the kit includes a directional primer bulb and 10 feet of 5/16-inch hose to restore reliable fuel flow for priming and running external tanks. It cross-references common OEM part numbers so you can match it to your engine and installation.

Which engines and models is this hose kit compatible with?

The iFJF line fits many outboards that accept an external fuel supply, including a wide range of Yamaha, Mercury, Johnson and OMC motors. Coverage commonly includes 4–200 hp models from the late 1980s through the 1990s, but some newer high-horsepower engines lack an external tank port and are not suitable.

• Compatible makes: Yamaha, Mercury, Johnson, OMC.
• Typical model years: Yamaha 1988–1998; many Mercury/Johnson/OMC models from 1990 onward.
• Horsepower range generally covered: 4 hp to 200 hp (check your engine for an external tank fitting).
• Not suitable when the outboard has no external fuel tank provision, common on newer 60+ hp designs.

How does the primer bulb and check valve work for priming?

The kit’s rubber primer bulb creates suction to draw fuel from an external tank into the outboard’s fuel line, and the built-in check valve prevents backflow once pressure builds. Arrows molded into the bulb indicate the correct fuel flow direction, ensuring you connect the line properly for effective priming.

• Rubber bulb includes a check valve to stop reverse flow.
• Molded arrows show correct installation direction.
• Bulb maintains flexibility across a range of temperatures to avoid collapse.
• Works with alcohol-enhanced fuels thanks to fuel-resistant materials.

What are the hose and material specifications I should know?

The fuel hose measures 5/16 inch inner diameter and extends 10 feet to give flexibility in routing between external tanks and outboard fittings. Materials are chosen for marine use—rubber formulations resistant to UV, ozone and alcohol-containing fuels—to reduce premature degradation in a marine environment.

• Inner diameter: 5/16 in (standard for many outboard fuel lines).
• Length: 10 ft for versatile mounting options and spare length for custom installs.
• Material traits: UV and ozone resistance, flexible in varied temperatures.
• Storage note: avoid prolonged exposure to high heat or harsh storage that can age rubber.

How do I check fitment and install the replacement line?

Confirm your engine’s external tank connection and compare OEM cross-reference numbers before purchasing. Installation is typically straightforward: route the hose, attach with clamps at both ends, position the primer bulb following its flow arrow, and test for secure, leak-free fuel delivery before regular use.

• Verify compatibility using cross-reference part numbers provided with the kit.
• Use marine-grade hose clamps at both tank and engine fittings.
• Place the bulb away from heat sources and follow arrow for correct flow.
• After installation, prime and inspect for any leaks or soft spots.

Who is this for: Boaters, mechanics and DIY enthusiasts who need a durable replacement fuel line and primer bulb for external fuel tank setups on small to medium outboards. If you operate older Yamaha, Mercury, Johnson, or OMC outboards that accept an external fuel feed, this kit provides a cost-effective, OEM-replacement-compatible option to restore priming and fuel flow. Avoid this product if your outboard lacks an external tank port or if your application requires hard-line or specialty fittings not provided in the kit.