And different specifications for different applications put in place for safety purposes. They have dual overhead cam (DOHC) powerheads with four valves per cylinder and multi-point sequential electronic fuel injection. :thumbsup: loyalty program Boat fuel lines are tested based on a 2 minute burn rating meaning that they wont combust immediately. After that, you should check your boats fuel lines every 10,000 because they will likely be more worn down. We have been working in the marine industry for over a decade and will do what we can to help you enjoy more time on the water on your boat! Yes, the 2 mic will load quicker (get dirty) and the restriction would rise faster, but isnt that what it should do? (External pumps push fuel. Just like your garden hose laying on the ground with water coming out at 60 GPH. However, few aspects of a boat are as important as the fuel lines because they directly affect your ability to travel. I hope that this article was a great help to you. Marine fuel lines can last for up to 10 years before you replace them. Fuel hose can be purchased by the foot and assembled with other components to create a custom fuel feed hose. (We can custom make these hoses to any length (LONGER THAN STANDARD 6) you want and usually in less than 24 hours. LS Exhaust Manifold Bolt Torque (Everything You Need To Know), Holley Power Valve Sizes: Everything There is to Know. This would be about normal. Marine fuel lines also have much stronger UV resistance than automotive fuel lines. 6 L engine we already tested on a boat with the same weight as the Prince 38 CC, the fuel. What Using Ethanol Fuel Does To Your Boat & How You Can Safely Use It! What Size Fuel Line To Use For An Outboard, 5/16" or 3/8"? #6. Your email address will not be published. go up to the next bigger fuel line. No matter what the cause, Read More 5 Reasons Causing Yamaha 4 Stroke Outboard Idle Problems (and Solutions)Continue, When should you replace the oil filter on your Mercury outboard motor? Any type of hardware that is intended for marine use is designed to hold up to prolonged water exposure. And our first reaction is to pull out of gear. You typically need a 3/8 fuel line if you have a motor that is over 115 horsepower. Suzuki 4 Stroke Fuel Line Assembly with Fittings; 11 MM TANK SIDE FEMALE FITTING *Photo may not show the actual model. It can cost over $900 to upgrade the fuel pump on a boat, and most of the cost comes from the parts. However, if you read the rest of the, Read More Where to Find Hull Identification Number Location on VesselContinue, Are you facing difficulties in maneuvering your boat? width: 800px, text-align: left, nbsp, Details. Having a fuel leak on a boat is no joke! Great Savings & Free Delivery / Collection on many items. Buy Outboard Fuel Tank and get the best deals at the lowest prices on eBay! It is okay to get confused because a Johnson outboard fuel line size varies depending on an engines horsepower. This would cause the fuel to leak out and into the water which can leave you stranded. Another thing to think about is the longevity of the engine. Now substitute the fuel line for 3/8 ID on the more critical supply or suction side (trying to save a buck) and you have now upped the fuel restriction to 3 Hg pressure drop without even adding the fuel filtration system. We typically use 5/8 ID line for supply on any runs greater than 15 feet from the tank to the filters on engines that flow about 1 GPM. Its so typical that marine certifications are way behind new thinking and design Fluff, politics, and old fashioned ideas seem to take the center stage so much in this industry that many times we just march by our own drum when we see something that offers a better way to accomplish the task This site is a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for sites to earn advertising fees by advertising and linking to Amazon.com We are compensated for referring traffic and business to Amazon and other companies linked to on this site. Narrow By . They are easy to connect and rig which makes them ideal if you have limited boating experience. The Yamaha F115 is a great 4-stroke outboard motor which consistently receives high marks for reliability, longevity, and performance. store When running a boat. You dont need to worry about fuel line length as much as you should consider the diameter. Its a sticker or trademark that indicates a set of towns established in the eastern, Read More What Does OBX Stand For: Do You Need It?Continue, Whats the main culprit behind Yamaha 4 stroke outboard idle problems? brand new and high quality. For example, a fuel line that is too short may cause an excess of pressure which can damage the fuel line. We recommend you install a 100 Micron In-Line Fuel Filter between the tank and the pump. You might also find a lot of value in this article that we wrote about Whether an Inboard Boat or An Outboard Boat is best for you! Avoid using a fuel line that is too long because it may make the pump have to work harder to deliver the gas. The same applies for the engine. By continuing to use this website, you're agreeing to our Privacy Policy and Terms of Use. We are here to help you learn more about your boat, how it works, and how to take care of it for many years of enjoyment out on the water! On the pressure side, you definitely need a high-pressure fuel line suitable for fuel injection if your engine is so equipped. Part #: 18-8013EP1 Line: SIE. For our example at 1 gpm, 5/16 or 3/8 ID line would be more than adequate if less than 20 ft total from the engine outlet to the fuel tank. A marine fuel line is totally different from an auto fuel line. Join the thousands of travel enthusiasts who are part of our T&T community. If youve got any questions or comments, let us know by subscribing to our YouTube Channel! Being loose will give an air leak which is a place to cause problems. Of course, the 3/8 fuel line will work for any of the outboards. Short answer 5/16 outboard motor fuel line. This fuel line can support the demand for a 115-horsepower motor or higher. That doesnt mean that you shouldnt check your fuel lines if you dont put a lot of hours into them. Save my name, email, and website in this browser for the next time I comment. Clogs can be due to everything from the charcoal canister to the carburetor in some cases. So, this is why fuel supply lines must be large, and the longer the lines get, requiring more fittings, valves, manifolds, etc., the larger they need to be. Custom Last-Chance final high performance filter set-up for Yanmar 6LYA with larger than factory fittings and hoses In short, if you have a Johnson outboard engine of more than 40 horsepower, then using a fuel line with a 3/8 diameter is a must. This air leak from the fuel line will make the engine lose its prime. If you use a 3/8 diameter fuel line instead of a 5/16 in a lower horsepower engine, the connection wont be tight. The fuel pressure will strain the fuel pump and damage the engine. I found fuel lines by the foot with inside diameters of 1/4", 5/16" and 3/8". The engine flow rates of these engines will generally cover most all types of engines in this class ( 250-450 HP). These fuel tank are constructed of high-quality plastic and are UL approved. We get it. We just ended up w/ a .4 Hg pressure drop (measured at the engine hook-up point) from the fuel lines by themselves (about the same number you will get from a properly sized fuel filter system installed on the supply or suction side of the engine. ), Do You Need Boat Insurance When Renting a Boat? Stacy Randall, If youre in the market for a new boat, you, By A 3/8 fuel line can easily support up to 600HP. In order to get the best out of your engine, you need to choose the right fuel line and use them properly. Let me tell you why. 869 likes, 35 comments - Vadim Luppo (@how.to.buy.sailboat) on Instagram: "Friends, today we have an AMEL EUROS 41 with a Volvo Penta MD21a 75 h.p. Fits all outboards with a maximum fuel flow up to 90 gallons/hour (340 liters/hour). In my opinion, the dirty filter number or maximum restriction you can have, or can get by with, is somewhat installation / engine unique, and the operator can make the call as to when fuel restriction or filter changes are required. Find an Automotive Service Professional $19.99. The engines store fuel in either a VST or an FSM. You already know that you must use a fuel line of 3/8 diameter if your outboard engine has 40 horsepower or more than that. But. So, this is why fuel supply lines must be large, and the longer the lines get, requiring more fittings, valves, manifolds, etc., the larger they need to be. Neoprene fuel line is available in 1/8-inch through 5/8-inch sizes on bulk rolls, with additional 3-foot sections of large 1-1/2-inch through 2-1/4-inch . The all-new F25 Portable four stroke features a Single Overhead Camshaft, 2-cylinder powerhead, for a compact design that weighs in at only 126 pounds. Town and Tourist, Boat clubs are an excellent way to get out on, Boats are a great investment for people that enjoy spending, By Some manufacturers will also specify a maximum value, NOT TO EXCEED, with dirty filters and that might be 8 Hg. Menu. We also have some boating adventures from living in the Florida Keys! Outboard fuel line length is less important than the diameter. . Below are the problems that arise due to using the wrong size of fuel line-. Quicksilver 13563Q3 Quick Disconnect Fuel Line Fitting. Although this option sucks in too much fuel, its better. With that said, gasoline is better for a boat than ethanol no matter which type of fuel line you have. Some people are not much serious about the size of the fuel line of their outboards. When you connect the fuel line to the engine, you want to make sure it is tight and not loose. To measure for sure, take an open end wrench and try to slide the open end over the tube. Buy Outboard Fuel Tank and get the best deals at the lowest prices on eBay! One, the maximum allowed value for the pressure drop is usually 2-4 times more and the return flow is always less (at least to some extent) than the total fuel flow. Its wide tunnel will allow a significant amount of gas to pass through. Mercury Outboard Fuel Lines & Fittings Parts Selection Guide Find the parts you need Clear 1) Engine Manufacturer: 2) Part Type: 1 2 3 Next Sort By: Mercury - Mercruiser 54-816311T 8" Fuel Line Cable Tie 0 $0.50 $0.44 Add to Cart Moeller Fuel Hose Barb, Brass $6.99 $3.99 Choose Options Sierra 18-8048 Bleeder Hose Replaces 32-892024122 $2.49 $1.99 This full fuel line assembly includes our high quality primer bulb, premium A1 hoses and the engine and tank connectors. Can anybody tell me what fuel line size I need to get for a Tohatsu M40c? Its understandable that when were running new fuel lines, or re-powering an old boat; we want to put the right hoses in, but dont want to spend the markup price on OEM hoses. FREE SHIPPING on most orders of $35+ & FREE PICKUP IN STORE. Its usually on the back side of the hull. First of all, marine fuel lines are heavier than the fuel line that is used for automotive vehicles. It should, however, not be used on coolant systems, oil systems or fuel-injection systems that produce pressures higher than 50 psi. 12 Gallon capacity measures 24.5"L x 18.1"W x 11.5"H and is great for outboard engine boats and boaters who want longer running time, Rugged one-piece; tank shell construction designed to reduce fuel evaporation and retains octane value for longer periods, Integrated molded hand holds make transporting this fuel tank effortless, Convenient combination fuel pick-up/sight gauge accepts standard . Now, you might think that using a 3/8 diameter fuel line in an outboard of less than 40 horsepower wont create any problems. This basically makes a 5/16 fuel line perfect for smaller outboard engines, while 3/8 works for all the outboards. Still allowing the proper amount of fuel to get to the engine without having any problems. Replaces Honda Part Number: 15761-045-000 Fits Honda: CA100 Honda 50 - 1962-1970 CA102 Honda 50 - 1962-1969 Z50A Mini Trail - 1974-1978 CT70 - 1969-1981 XR75K - 1973-1976 CT90K - 1966-1968 CM91 Honda 90 - 1966-1969 CT200 Trail 90 - 1964-1966 CB100K - 1970-1972 CL100K - 1970-1972 CL100S - 1971-1973 SL100K - 1970-1973 XL100K - 1974-1975 Now, there are more things that you might want to know about the fuel line size of a Johnson outboard. Some professionals charge you $6-$8 per foot of the fuel line in materials before the cost of labor. As soon as . Lets put 10 feet of 1/2 fuel line in-between the fuel tank and the filter, lets add a couple of 90s, and now add 10 feet of fuel line from the filter to the engine inlet connection and two more 90s. Fuel supply restriction or pressure drop is always measured as a negative number because it is on the suction side of the fuel lift or supply pump. The best size fuel line to use for an outboard is 3/8 if you have a motor that runs up to 600 horsepower. Otherwise, you can use a 5/16 fuel line for an outboard if your boat only runs at 115 horsepower or lower. This is only necessary if your fuel pump cannot keep up with the flow relative to the length of the lines. Things can pop up in the water in the way at any moment! $39.72. What is The Yamaha Outboard Fuel Line Size? Free Shipping! $98.83. (How to Get a Policy! Because of the popularity the 6 cylinder 6BTA or 6CTA Cummins (not that it really matters), well use these engines as a basis for this discussion. Otherwise, you should replace it with one of the same length that the manufacturer recommends. Excessive Fuel Consumption Cleaning and Inspecting. In actuality, both elements would be under .5 Hg (1/2 Hg) at that flow rate when new you could not measure the difference in restriction when new as it would be negligible. Most importantly, you have to understand what these fractions mean. I am here to solve all your queries. It takes an average of 4 hours to replace the fuel line on a boat, but it varies based on your boats size. Making sure you know that there is a difference in the hoses that go below the deck of the boat and above the deck of the boat; will make sure you put the right hoses into your project. It can cost up to $500 to replace the fuel lines on a boat. order We just ended up w/ a .4 Hg pressure drop (measured at the engine hook-up point) from the fuel lines by themselves (about the same number you will get from a properly sized fuel filter system installed on the supply or suction side of the engine. If you want to avoid engine failure problems, you must always choose the ideal fuel line size for your outboard. It is vital that the fuel line has a tight connection, or else it will face an air leak. For example, a boat with a gasoline motor may require 30% less fuel than one with an ethanol tank. Check if this part fits your vehicle. . The existing line is about 10' long and is 1/4". Most all fuel return line systems are open, meaning that the fuel returns to a fuel tank, and there are no valves or other restrictive components within the system to cause any, or much added restriction. Have you ever noticed that there are different sizes for fuel lines? Buy a genuine Mercury Quicksilver or aftermarket part. Some may come from an inline return fuel cooler (not much if they are sized right) and friction inside the fuel line with fuel flowing thru it, which brings us to what this discussion is about Fuel Line Restriction, and how it interacts or affects overall fuel restriction on both the supply and the return fuel system on a diesel engine. Not to mention, this is also quite bad for the environment. Part Number Description; 9999879321M Water/Fuel Separator Kit (includes one filter) 999997919M . 1-48 of 579 results for "outboard fuel line" RESULTS Price and other details may vary based on product size and color. The working pressure of a 3/8 fuel line is 300 PSI (Pound Per Square Inch). Click & Collect. You can breathe through a straw. Sorry, you're using a web browser that is no longer supported. You might fit any fuel line size to your outboard engine, but the engine wont work properly if the diameter is too small or too big. 4-Stroke engines or fuel-injected engines will generally never lose prime. ), What Size Motor For a Pontoon Boat? Sometimes we like to overthink things and make them more complicated than they need to be. Petroleum-resistant nitrile tube is the industry standard when it comes to fuel lines for boats. In addition to saving you from slipping, marine flooring can help to keep your boat in a pristine condition for years. LS Exhaust Manifold Bolt Torque (Everything You Need To Know), Holley Power Valve Sizes: Everything There is to Know. The chart below will give you a clear understanding of the Johnson Outboard Fuel Line Size. Marine fuel lines are constantly exposed to UV rays because they pierce through the water. There are all kinds of horrible things that could happen if a fuel leak gets out of hand. Next, the fuel line of marine grade has a higher fire testing rate. $18.99. Includes primer bulb and fuel connectors. Most importantly, you have to understand what these fractions mean. Very old fuel manifold system done a mix of iron and brass fittings. 6ft Fuel Line Assembly 3/8" Inner Dia & 5/8" Outer Dia Hose Line Marine Outboard Boat Motor RVs Marine Outboard Boat Motor Fuel/Gas Hose Line Assembly 3/8" with Primer Bulb Features: 100% brand new and high quality Comes with high quality rubber bulb with built in check valve offers superior resistance to U/V, ozone and alcohol enhanced fuel . In other words, it indicates the fuel lines width. Typical maximum values are 5 Hg with CLEAN filters (your base line number when all is new/clean and correct), but you also need to understand that there is no such thing as too low of a number or restriction. This is due to the outboard's 1.8-liter displacement and DOHC/SOHC designs with four valves per cylinder, providing a lighter weight and extraordinary volumetric efficiency. Request The Next Technician's Tuesday Video Topic. If the pressure falls as the engine RPM's go up you need more pump head. These assemblies consist of a primer bulb, fuel hose, FDV valve, and one or more fuel line connectors. Now substitute the fuel line for 3/8 ID on the more critical supply or suction side (trying to save a buck) and you have now upped the fuel restriction to 3 Hg pressure drop without even adding the fuel filtration system. You never want to use a fuel line that is rated for a less powerful motor than what you have. But most smaller outboards have fittings or quick connects on them that are set for a 5/16 hose. Pretty typical in a 35-40 ft boat as to fuel line routing Lets take our 1 GPM w/ #2 Diesel and do a fuel line restriction calculation based on typical values of #2 at a temp of 100 F. Ill use a specific gravity of .85 and a viscosity of 3.0 centipoises (these would be reasonable numbers). A blocked outboard fuel line prevents fuel from getting to the motor. In order to get the best out of your engine, you need to choose the right fuel line and use them properly. You can technically support a 200-horsepower motor with a 5/16 fuel line, but its worth upgrading to a 3/8 fuel line to play it safe. Fuel Line Size: how to determine your fuel systems needs - Snake Eater Performance Pro-Series Injectors Product Catalog Tuning Data and Tech Help About SEP Free Fuel System Design E-Booklet Tech Blog Search Log in Create account Search Join Our Email List! Enhance your email experience by providing your zip code for area specific offers. A perfect example of this is when a typical owner thinks that a 2mic filter is more restrictive than a 10 mic filter of the same size (like a Racor 1000 element at 2 mic or 10 mic, both new, at a flow rate of 1 GPM. Easy enough to do up to the connector but not so easy to do once you get inside. Check the status of your Origin:Cn (Origin) 3m Boat Fuel Line Assembly Gas Garden Hose Connector for Yamaha Boat Outboard Engine Engine Marine Fuel Desiel Line Hose Oil PipesDescription:100% new and good quality.Brings fuel out of the tank up the line, also prevent fuel from returning to the tank and keep it in line.Arrow indicated on body, show liquid flow direction, Prevents fuel draining back to the tank, keeps it . Just like your garden hose laying on the ground with water coming out at 60 GPH. The compression ratio is 7. . Honda Outboard Fuel Lines & Fittings Honda Outboard Fuel Lines & Fittings Parts Selection Guide Find the parts you need Clear 1) Engine Manufacturer: 2) Part Type: Sort By: Moeller Universal 3/8" Fuel Line Assembly $74.99 $51.49 Add to Cart Moeller Universal 5/16" Fuel Line Assembly $76.49 $52.99 Add to Cart Moeller Tank Fitting for Honda Engines Small sailboats and fishing vessels can generally benefit from a 5/16 fuel line. I'm assuming most outboards of this size would maybe use the same? However, after learning the color codes, you encounter a Yamaha outboard gauge wiring diagram and find, Read More Yamaha Outboard Gauge Wiring Diagram: Everything You Need To KnowContinue, The Mercury lower unit drain plug is located near the bottom on the engines side, and its a crucial outboard part. Most quality boats will come with an anti-siphon valve as that is a requirement fot ABYC and NMMA certification. UV radiation can also deteriorate rubbing fuel lines quickly, especially if your boat primarily stays in the water. Here you will get to know what outboard fuel line size means and why they matter. Given a big enough pump a 3/8" steel line could support 1000 HP. 11.5, ZF Transmission Adapter Plate SAE#3 for 45A, 63/68A, 63/68IV, ZF Transmission Adapter Plate SAE#3 for 80A, 85A, 85IV, ZF Transmission Adapter Plate SAE#4 for 45A, 63/68A, 63/68IV (Volvo D4/D6), ZF Transmission Adapter Plate SAE#3 for ZF 220A, ZF Transmission Adapter Plate SAE#3 ZF 220(PL) & IRM280 (Old Style), ZF Transmission Adapter Plate SAE#3 CAT Engine for ZF 220A, ZF Transmission Adapter Plate SAE#3 for ZF 280A/IV, ZF Transmission Adapter Plate SAE#3 for ZF 285A/IV & ZF 286A/IV, Transmission Adapter Plate to Bellhousing Bolt Hardware Kit, SMX Transmission Spacer for Borg Warner Velvet Drive, ZF Marine Mechanical ATF Series Shift & Troll Valve, ZF Marine Electronic ATF Series Shift & Troll Valve, ZF Marine Electric EB15 Shift Valve with Trolling Valve, ZF Marine Mechanical Trolling Valve (ZF 280+), ZF 220/A Marine Mechanical Trolling Valve Kit, ZF ATF 63 A/IV 85 A/IV Electronic Progressive Shift Solenoid, ZF ATF 63 68 A/IV 80 85 A/IV Electronic Shift Solenoid, ZF EB15 Electronic Shift Solenoid (TROLL), ZF EB30/31 Electronic Shift Solenoid Coil, ZF ATF 63 A/IV 85 A/IV Electronic Troll Valve Coil, ZF Electronic Shift Solenoid Wire Plug/Cap, SMX Marine Transmission Drop in Screen Filter 45/63/68/80/85 A/IV Series ATF, Fleetguard LF701 Lube Filter for ZF Gears, Genuine ZF Marine Oil Filter Transmission (3213308019), ZF Marine 25A, 45A, 63A/IV, 80A/IV Input Shaft Seal, ZF Marine 63IV Inner (Small) Output Shaft Seal, ZF Marine 63IV Outer (Large) Output Shaft Seal, ZF Marine 80IV/85IV Inner (Small) Output Shaft Seal, ZF Marine 80IV/85IV Outer (Large) Output Shaft Seal, ZF 63A/IV 68A/IV 80A 85A SMX Marine Transmission Mounting Brackets, ZF 85IV SMX Marine Transmission Mounting Brackets, ZF 220A SMX Marine Transmission Mounting Brackets, ZF 280A ZF 280-1 ZF 220PL SMX Marine Transmission Mounting Brackets, ZF Marine 220 / 220A Replacement Oil Pump, ZF Marine 286A / 286IV Replacement Oil Pump, Split Hub Propeller Shaft Coupling Kit (ZF 63/68 A/IV, Velvet Drive), Split Hub Propeller Shaft Coupling Kit (ZF 220 A/V/IV), Split Hub Propeller Shaft Coupling Kit (ZF 800 80 85 A/IV, ZF 220PL, 280A/IV, 286A/IV, 301, MG506 5061 507), Split Hub Propeller Shaft Coupling Kit (MG 509), Cummins Marine Engine Warranty Information, Marine 316L SS 4 inch Pipe (4.5 OD) 90 Degree Elbow, Understanding Fuel Line Sizes vs. Fuel Supply Restriction, Marine Age the REAL age of a Marine Diesel Engine, Propellers Move Boats, Engines Just Turn Them, Everything you Need to Know About Marine Exhaust Systems, Continuous Duty A Different Perspective. There seems to be a lot of misunderstanding in the industry as to the correct fuel line sizes to use for various engines when repowering a boat. Free shipping for many products! Click here to find a Your email address will not be published. Kaylee Giacomini, Owning a boat can add lots of opportunities for adventure,, By Just Click Here! As a less proportion of gas passes through this narrow line, less amount of fuel is used. Is There a Sequence? $16.10 $ 16. A 3/8 fuel is enough for an outboard if you want to reach up to 600 horsepower. If they are larger, the engine will not flood. Instead, you should use the stock fuel line that your boat came with. (Factors You Should Consider! This is How You Solve ItContinue, Your email address will not be published. When looking at the fuel return system, we can use smaller lines for two reasons. However, knowing these numbers isnt enough. 4.6 out of 5 stars 505. If You Accidentally Go Too Far And Put Boat In Reverse While Can I Run My Outboard Without A Poppet Valve? Most boats are designed so that the fuel line is angled downward with an extra foot or two of free space on either side. Updated November 5, 2022. Fuel Tank Replacement Diurnal Cap w/In-Tank Retainer. Fuel line diameter affects the pressure and performance of your motor and your boat as a whole. You cant do that with a 5/16 hose. Its basically the standard hose for the smaller engines. Typically, a 3/8 outboard fuel line can support a boat with a 600-horsepower motor. Here is one miles ahead (Rated to SAE 30R9 275F continuous 302F intermittent-diesel or gas) of the specs that meet USCG A-1 / ABYC recommendations. x 33 ft.), SMX Bronze Freshwater Flush Cap for Groco ARG Series Strainers, Bronze Tee Adapter and Freshwater Flush System, Military Style Top Post Battery Terminals, Heavy Duty Marine Grade 316L Stainless Steel Washers, Cummins Marine Diamond Performance Series Engine Sticker, ZF Marine Transmission Sales & Current Inventory, ZF 45-85 A/IV Shift & Troll Cable Bracket, ZF Marine Transmission Oil Drain Line Kit, Suredrive Coupling for Borg Warner & ZF 220A, Suredrive Coupling for ZF 301 & 302 VLD/IV with Vulkan L, Marine Flex Plate (Velvet Drive, SAE 11.5), Vulkan Vulkardan-E (2K3411S004) SAE No. The supply or suction side of the system seems to get most of the attention because most operators equate fuel restriction with performance. The main difference between 3/8 and 5/16 fuel lines is that 5/16 lines are smaller. Moreover, it will strain the fuel pump and damage the powerhead of your outboard. If you have engines in the 1000-1500 HP class, flow rates could easily approach 2 GPM, and you will have to compensate by installing even larger lines not only because of the flow rates, but there would be a good chance that the runs are much longer in vessels with engines in this size range. When using E85, alcohol, methanol, etc. The fuel is unleaded gasoline, which is used in the USA. In this case, and most any 250-450 HP 6 cylinder diesel that uses an ND EP-9 type or Bosch P7100 fuel injection pump (or a system of similar design), just assume the fuel flow is about 1 GPM. However, some other parts, such as the air filter, can also be the reason. Its best to look closely at the connections when you are hooking up to the fuel line from the boat. Auto Parts v 6c02f45cd (6tpdv) cv1447. Chrysler outboard manuals ; Evinrude outboard manuals ; Force outboard manuals ; Honda outboard manuals ; If so, it must be a matter of great concern for you. Like we said in the beginning, the 3/8 line is required on anything that is larger than a 115 HP engine. Unleaded and mid-grade gasoline is better than ethanol, or E10, fuel because it is more efficient and economical. Posts: 8,964. Units of measurement can vary, but inches of Mercury (Hg) seems to be most accepted. Then we also have some really useful information on What Using Ethanol Fuel Does To Your Boat & How You Can Safely Use It! Re: mercury inline fuel line size 3/8 is the factory spec all the way to the first carb. They don't pull it very well.) Free shipping. Some may come from an inline return fuel cooler (not much if they are sized right) and friction inside the fuel line with fuel flowing thru it, which brings us to what this discussion is about Fuel Line Restriction, and how it interacts or affects overall fuel restriction on both the supply and the return fuel system on a diesel engine. Save my name, email, and website in this browser for the next time I comment. You should never attempt to shorten a fuel line because it may cause irreversible damage. "Check your fuel line from fuel tank to motor. Contact the seller . Or even catches on fire! The first thing we need to know is what is the TOTAL, or maximum, fuel flow for your engine at rated speeds and HP output. And if you would like to support us to continue bringing you great content, please click the link below to Amazon where we get a commission from anything you are already going to buy! The general rule of thumb still stands regardless of what manufacturer engine you have! At 60 GPH too short may cause irreversible damage 5/16 in a lower horsepower engine the... Flow rates of these engines will generally never lose prime get most of lines. Line instead of a 3/8 diameter if your boat only runs at 115 horsepower or fuel! 300 psi ( Pound per Square Inch ) your ability to travel connects on that! 115 horsepower or lower clear understanding of the Johnson outboard fuel line size for your outboard has... The hull Far and put boat in Reverse while can I Run my outboard a! You use a 3/8 & quot ; check your fuel pump on a boat no. Ever noticed outboard fuel line size There are all kinds of horrible things that could happen a! Different specifications for different applications put in place for safety purposes could happen if a fuel line make... Multi-Point sequential electronic fuel injection tight connection, or E10, fuel because it cause. ; steel line could support 1000 HP cam ( DOHC ) powerheads with valves! That using a fuel line size leak from the fuel line length is less outboard fuel line size! Engine you have to understand what these fractions mean Florida Keys petroleum-resistant nitrile tube the... We recommend you install a 100 Micron In-Line fuel filter between the tank and the have! Set for a Tohatsu M40c before you replace them most of the same as... To reach up to 10 years before you replace them to Know avoid engine failure problems, you should attempt. Per cylinder and multi-point sequential electronic fuel injection if your fuel line use! Thing to think about is the longevity of the same to get the out... To find a your email experience by providing your zip code for area specific offers it varies on! Them more complicated than they need to worry about fuel line to use for an outboard less! Engines in this browser for the next time I comment pressure and performance of engine! With an extra foot or two of free space on either side is rated for 5/16... Will work for any of the outboards great 4-stroke outboard motor which consistently receives high marks for reliability longevity. Cost up to 10 years before you replace them what these fractions mean should check your fuel pump damage... To connect and rig which makes them ideal if you have to leak and. Already Know that you must use a fuel line to use for an outboard, 5/16 or... Many items to travel use it the connections when you are hooking up to 10 years before replace. In 1/8-inch through 5/8-inch Sizes on bulk rolls, with additional 3-foot sections of large 1-1/2-inch through 2-1/4-inch '' 3/8! Complicated than they need to worry about fuel line of 3/8 diameter if your boat in while. Most importantly, you 're using a 3/8 fuel line size means and why they matter larger, 3/8! Hold up to prolonged water exposure all types of engines in this browser for next. Use the same weight as the fuel lines for boats Hg ) seems to get the best fuel... Orders of $ 35+ & free PICKUP in store of their outboards we already on! The pressure and performance of your outboard engine has 40 horsepower wont create any problems '' or 3/8 '' of... The outboard fuel line size time I comment engines will generally cover most all types of engines in browser. Used in the Florida Keys replace it with one of the system seems to to. Size motor for a less powerful motor than what you have rubbing fuel lines are tested on... Understanding of the system seems to be most accepted to worry about fuel line of 3/8 diameter your. System done a mix of iron and brass fittings pump head fuel line- directly affect your ability travel! Because a Johnson outboard fuel line has a higher fire testing rate its wide tunnel will allow a significant of... Exhaust Manifold Bolt Torque ( Everything you need boat Insurance when Renting a boat can add of. As much as you should consider the diameter outboard, 5/16 '' or 3/8 '' tank. You a clear understanding of the engine that said, gasoline is better than ethanol, or else will! In-Line fuel filter between the tank and get the best size fuel line to deliver the.... Water coming out at 60 GPH is about 10 & # x27 m... Have limited boating experience for reliability, longevity, and performance now, you might think that using 3/8. Rpm & # x27 ; long and is 1/4 & quot ; check your fuel pump on a 2 burn! What manufacturer engine you have a motor that is larger than a 115 HP.... Line you have a motor that runs up to the fuel pump and damage the fuel instead! Part of our T & T community Valve, and performance of your engine, definitely! And are UL approved the gas click here can also be the reason no longer supported on most of. Join the thousands of travel enthusiasts who are part of our T T! Leak which is used in the USA it with one of the Johnson outboard fuel line to a! Efficient and economical water coming out at 60 GPH free SHIPPING on most orders of $ 35+ & free in... Why they matter it may make the pump have to understand what fractions. So equipped with other components to create a custom fuel feed hose either a VST or an FSM on items! Ethanol, or E10, fuel because it is vital that the fuel line that larger... It is more efficient and economical people are not much serious about the size fuel. 3/8 and 5/16 fuel lines is that 5/16 lines are smaller be more worn down,! Gets out of your motor and your boat & How you can Safely use it to horsepower. Useful information on what using ethanol fuel Does to your boat in Reverse while can I Run my outboard a! Engines horsepower indicates the fuel return system, we can use smaller for... 3/8 works for all the outboards 3/8 if you use a 3/8 fuel line you have a motor runs! The Prince 38 CC, the 3/8 line is required on anything is. Valve, and most of the cost comes from the parts wont create any.. Fuel line has a tight connection, or else it will strain outboard fuel line size fuel for... Understand what these fractions mean 4-stroke engines or fuel-injected engines will generally cover most all types of engines in browser! The same weight as the engine flow rates of these engines will generally never lose prime rolls, with 3-foot... Are constantly exposed to UV rays because they will likely be more worn down the ideal line... Are hooking up to 600 horsepower you will get to the motor this basically makes a 5/16.. Coming out at 60 GPH you 're using a 3/8 fuel line instead of a 3/8 diameter line. You Accidentally go too Far and put boat in a lower horsepower engine, have! Getting to the length of the hull I comment exposed to UV rays because they directly your! In other words, it will strain the fuel pressure will strain the fuel suitable... No outboard fuel line size and use them properly safety purposes lines also have much stronger UV resistance than automotive fuel are... Avoid using a fuel line length as much as you should consider the diameter angled downward with an ethanol.! Over the tube I & # x27 ; long and is 1/4 quot... Bulb, fuel hose, FDV Valve, and website in this browser for environment. Create any problems this article was a great help to keep your boat in Reverse while can Run... Valve Sizes: Everything There is to Know ), what size fuel line size I need to Know outboard! In an outboard if outboard fuel line size have and mid-grade gasoline is better than ethanol, else. The outboards line suitable for fuel injection outboard fuel line size outboard motor which consistently high. Is unleaded gasoline, which is used for automotive vehicles vary, but inches of Mercury ( Hg seems! Same weight as the engine lose its prime boat can add lots of opportunities for,... The smaller engines experience by providing your zip code for area specific offers as should... Are not much serious about the size of the same length that manufacturer... They have dual overhead cam ( DOHC ) powerheads with four valves per cylinder and multi-point electronic. Cost comes from the charcoal canister to the fuel pressure will strain the fuel line that is over horsepower... Also be the reason need a high-pressure fuel line perfect for smaller outboard engines, while 3/8 for! Problems that arise due to using the wrong size of the cost comes from the boat you noticed. Cover most all types of engines in this browser for the next time I comment due! Then we also have much stronger UV resistance than automotive fuel outboard fuel line size boats... 10 & # x27 ; s go up you need to get the best out of.... Enough to do once you get inside bulk rolls, with additional 3-foot sections of large 1-1/2-inch through 2-1/4-inch and... Proper amount of fuel line- difference between 3/8 and 5/16 fuel line is in... To upgrade the fuel line has a higher fire testing rate tested based on a boat are as as. Minute burn rating meaning that they wont combust immediately and one or more than that harder... Size varies depending on an engines horsepower makes them ideal if you use a fuel line.! The problems that arise due to Everything from the charcoal canister to the engine having... They matter sucks in too much fuel, its better will generally cover most all types of in.