What size is marine fuel line?
Mercury/Mariner O/B Standard Fuel Line Assembly, 6′ x 3/8″
| Compatibility | 93806BLP7 |
|---|---|
| Inside Diameter | 3/8 Inch |
| Outside Diameter | 11/16 Inch |
| Maximum Continuous Length | 6 Foot |
| Type | Fuel Tank Lines |
Is marine fuel line different than automotive fuel line?
As I understand, one big difference is better UV resistance in the marine fuel line. Automotive fuel line gets a virtually no exposure to direct daylight, so little to no need for UV protection. Another possible difference is better flame resistance in the marine fuel line.
Which is bigger 5/16 fuel line or 3 8?
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.
What size fuel line do I need?
Fuel pumps are sized to feed your system with enough fuel to optimize engine performance….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 |
How much horsepower can 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 should a fuel return line be?
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 is marine grade fuel hose?
These are specifically designed and branded for use in supplying fuel to motors in boats or marine vessels. USCG Type A1 hoses are designed for fuel feed applications where the fuel is constantly in the hose, whereas Type A2 hoses are designed for fuel fill type hoses only.
What kind of hose can you use for diesel?
Coast Guard standards require all fuel hoses used for marine applications to bear the mark USCG every 12 inches, while specifying the manufacturing date. The American Boat & Yacht Council (ABYC) recommends the Type B1 fuel hose for diesel-based applications. The Type A1 hose is the best option for gasoline supply.
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.
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.
How much horsepower will a 3/8 fuel line support?