metric fuel line sizes

by Janelle Green Published 3 years ago Updated 2 years ago

FYI: Popular fuel line sizes: -6AN (=3/8" OD) -8AN (=1/2" OD) -10AN (=5/8" OD) -12AN (=3/4" OD) Use of -3AN and -4AN line: 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.

Full Answer

What size fuel line should I run?

No matter how many bends and what not you have in the line to the pump, you still cannot flow more than the 5/16 tube can supply. In the short run, you can make 3/8 rubber fuel line connect 1/2 and 3/8 hard line. Not a good long term, but it will work until you have time.

How to measure fuel line fittings?

Tapered Thread

Thread Types: Straight Thread - With straight thread the threads run parallel. ...
AN Standards. High-end racing and performance fuel delivery systems most frequently implement fuel lines and fittings manufactured to AN Standards.
Common Types of Fittings. ...

What size fuel line?

How do you replace the fuel lines on a chainsaw?

Drain the fuel tank. Wear work gloves to protect your hands.
Remove the cylinder shield.
Disconnect the spark plug wire and remove the air filter.
Remove the fuel filter.
Remove the carburetor.
Remove the old fuel lines.
Install the new fuel lines.
Install the fuel filter.

What size is 6an fuel line?

What size is 6an fuel line? Simply so, what size are fuel lines? Most stock applications came with 5/16-inch fuel line, but for many street vehicles and mild race applications 3/8-inch (AN 6) fuel line is a good upgrade. High performance applications and racers using alcohol will use 1/2-inch (AN 8) fuel line.

What sizes do fuel lines come in?

Recommended Size, Based on HorsepowerRecommended Fuel Line Size (from the tank to the pump)Engine OutputSize (inches)Size (AN)350 hp or less5/16 in.-5350-450 hp3/8 in.-6450-650 hp1/2 in.-81 more row•Sep 16, 2017

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.

How do I know what size fuel hose I need?

1:293:13How To Measure the Diameter Of Any Hose - YouTubeYouTubeStart of suggested clipEnd of suggested clipSo it's 6 over 16 so 6 6 / 16 very very simplest and all that you do is you're taking 6 sixteenthsMoreSo it's 6 over 16 so 6 6 / 16 very very simplest and all that you do is you're taking 6 sixteenths of an inch and divide it by 2 if you can so 6 16 divided by 2 is 3/8.

Does size of fuel line matter?

Does size really matter when it comes to fuel lines? According to the fuel delivery system experts at Fuelab, it does. It's because fuel line size and length have a direct effect on the amount of fuel pressure drop your fuel system will experience.

Can a fuel line be to 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.

Are Yamaha and Mercury fuel lines the same?

Yamaha Outboard Fuel Line Assembly Will also fit Mercury & Mariner outboards which require the tank end to push on to 8-10mm barbed fuel fitting. Please note engine end connector will only fit Mercury Mariner engine 1987 & Newer. 5/16" ID Hose is compatible with most outboard engine fuel systems.

Is 3/8 fuel line big enough?

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 is 3/8 fuel line?

Understanding Fuel Line Fittings: Straight Thread (and AN) vs. Tapered ThreadAN SizeTube or Hose ODTube or Hose ID-4¼”.172”-55/16”.062”-63/8”.297”-81/2”.391”9 more rows•May 6, 2015

Is a shorter fuel line better?

In the case of fuel lines, two influences increase friction and therefore fuel pressure drop. The first is the length of the fuel line – the longer it is the more friction will be incurred. The second is flow rate – as the rate is increased so is friction.

What size is metal fuel line?

For most recent cars, supply is 5/16" and return and vent are both 1/4".Metal fuel line sizes | Allpar Forumshttps://www.allpar.com › threads › metal-fuel-line-sizes.1...https://www.allpar.com › threads › metal-fuel-line-sizes.1...Search for: What size is metal fuel line?

What size fuel return line should I use?

The Fuel Return Line should be at least the same size, or one size larger than the supply. Make sure there are no sharp bends or kinks. The return line should direct fuel close to the bottom of the tank and away from the pickup.What size fuel return line do need? - Help Center - Summit Racinghttps://help.summitracing.com › answers › detail › a_idhttps://help.summitracing.com › answers › detail › a_idSearch for: What size fuel return line should I use?

How much horsepower will a 5/16 fuel line support?

If you're just cruising around with a carbed SBC, you'll probably be fine with a 5/16" line up to about 500 HP because you'll never tax the system enough to starve the motor of fuel.How much HP will a 5/16 fuel line support | Chevy Tri Five Forumhttps://www.trifive.com › threads › how-much-hp-will-a-...https://www.trifive.com › threads › how-much-hp-will-a-...Search for: How much horsepower will a 5/16 fuel line support?