Marine Fuel Line Hose 5/16 in 25ft - Type A1-15 EVIL

In this review of the marine fuel line hose, the bottom line is straightforward: this 5/16 in, 25 ft hose is aimed at boaters and marine mechanics who need a regulation-compliant fuel supply line that balances durability and flexibility. It is most notable for meeting SAE J1527 type A1-15 and related standards, which makes it a safe choice for pleasure boats; those requirements are the single biggest reason to choose it when replacing or routing fuel lines on small craft.

Key Features

• Size and length: The 5/16 in inner diameter and 25 ft length provide a common fit and ample run for many outboard installations and inboard routing without frequent couplers.
• Pressure ratings: With a 300 PSI working pressure and 900 PSI burst pressure, the hose handles typical fuel system pressures with a healthy safety margin.
• Temperature range: Rated from -20F to 221F (-30C to 105C), it tolerates cold starts and warm engine bay conditions without immediate degradation.
• Construction: NBR inner, NBR+PVC outer and polyester braid reinforcement deliver chemical resistance to gasoline, diesel and E85 while keeping the hose structurally supported.
• Regulatory compliance: Meeting SAE J1527 type A1-15, ISO 7840 type A1 and NMMA/CE accepted standards ensures it satisfies low permeation and marine use criteria.
• UV and weather resistance: The outer compound resists weathering and UV exposure, which is useful for exposed runs on decks and engine compartments.

Who It's For

This hose is best for boat owners, marine technicians and DIY installers who need a compliant fuel hose for outboard motors, sterndrives or auxiliary engines. The combination of recognized marine standards and compatibility with gasoline, diesel and E85 makes it suitable for most small-boat fuel systems where regulation compliance matters.

It is less appropriate for applications requiring very small bend radii or extreme flexibility in tight spaces, since some users report mixed flexibility impressions. Also, those needing metric-only fittings or specialized shore-power lines should look elsewhere.

Pros & Cons

Pros

• Meets multiple marine and low-permeation standards for compliant installations.
• High working and burst pressures provide reliability under load.
• Durable construction with NBR/PVC compounds and polyester braid for chemical and abrasion resistance.
• Long 25 ft length reduces the need for additional joins in many installations.

Cons

• Flexibility is mixed in user reports; it can be stiffer than expected for tight bends.
• Outer diameter requires verifying clamps and fittings to ensure proper seating.

Specifications

Brand	EVIL ENERGY
Inner diameter (ID)	5/16 in (8.1 mm)
Outer diameter (OD)	14.5 mm
Length	25 ft
Working pressure	300 PSI
Burst pressure	900 PSI
Temperature range	-20F to 221F (-30C to 105C)

Our Verdict

This 5/16 in, 25 ft marine fuel hose is a sensible buy for boat owners who need a regulation-compliant, durable fuel line that handles gasoline, diesel and E85. It represents good value when compliance and pressure ratings are priorities, though installers should consider routing to avoid very tight bends where the hose may feel stiff.

Frequently Asked Questions

Is this hose safe for ethanol blends like E85?
Yes. The NBR inner compound is compatible with gasoline, diesel and E85, making it suitable for ethanol-blended fuels.

Can it be used on pleasure boats that require type A1-15 lines?
Yes. It meets SAE J1527 type A1-15, ISO 7840 type A1 and NMMA/CE accepted standards for pleasure boat fuel lines.

Will it work in cold climates?
The rated temperature range to -20F (-30C) means it is designed to withstand typical cold-weather conditions encountered in marine use.