What is the outside diameter of 5/16 fuel line?

What is the outside diameter of 5/16 fuel line?

Inside Diameter: 5/16″ (7.9mm) Outside Diameter: 9/16″ (14.15mm)

Which fuel line is bigger 3/8 or 5 16?

The 5/16″ fuel line is actually perfect for smaller outboards. Being a little smaller than the 3/8″ hose, it works great for little kicker motors, and sailboat outboard engines. Being smaller allows it to go easily into a smaller rigging tube, depending on the application.

Does bigger fuel line size matter?

Fuel line diameter matters A LOT! A larger diameter is generally better, but the correct diameter is the best choice. If the diameter is too small: you won’t be able to support your horsepower goal. If the diameter is too big: the lines will take longer to pressurize.

What size is 5/16 hose?


Dash Size Inside Diameter
-4 1/4 6.3
-5 5/16 7.9
-6 3/8 9.5
-8 1/2 12.7

What tubing is good for gasoline?

Fuel line is a petroleum-resistant nitrile tube with a covering that resists weathering, ozone and heat and can be used for ethanol-laced fuels and diesel fuel.

How much horsepower can a 3/8 fuel line support?

A 3/8”id fuel line can easily support 600 HP given sufficient “pump head”! Given a big enough pump a 3/8” steel line could support 1000 HP. The simple way to know is to install an electronic fuel pressure gauge. If the pressure falls as the engine RPM’s go up you need more pump head.

What size are fuel lines?

Typically, these 1/4″ and 5/16″ line sizes are in use for low flow or OEM systems, but are commonly used in high performance applications for pressure gauges as well as plumbing between the Regulator and Intake Manifold.

What sizes does fuel line come in?

Recommended Size, Based on Horsepower

Recommended Fuel Line Size (from the tank to the pump)
Engine Output Size (inches) Size (AN)
350 hp or less 5/16 in. -5
350-450 hp 3/8 in. -6
450-650 hp 1/2 in. -8

Will PEX hold up to gasoline?

I went and reviewed several Chemical Resistance Charts for PEX tubing. It appears that the hydrocarbons in gasoline and the alcohol additives have no long term affect.

Is vinyl tubing good for gasoline?

No – unless specially made for this purpose do not use plain ordinary vinyl tubing for gasoline and other hydrocarbons.

Can fuel line be too long?

Your fuel line should be about the same. Too long and your engine may have trouble scavenging for fuel. This makes it difficult to tune the engine.

What size fuel line should I run?