Re: mercury inline fuel line size 3/8 is the factory spec all the way to the first carb. 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. Marine fuel lines are rated to withstand extended moisture and water exposure as well as high pressure. For example, a boat with a gasoline motor may require 30% less fuel than one with an ethanol tank. It can cost up to $500 to replace the fuel lines on a boat. Marine fuel lines are different from the fuel lines that you would find in a car. But over time you will not be getting the proper amounts of air that you need and will eventually pass out! Wherever you hook up the fuel line on the engine there will be a hose barb. Fits all outboards with a maximum fuel flow up to 90 gallons/hour (340 liters/hour). He also knows a lot about history. Well get to that later as that is a slightly different subject. Find an Automotive Service Professional 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. But why is that so? I hope that this article was a great help to you. In simple words, it means Outer Banks. Obviously, the difference between the two fuel lines is one is smaller than the other. Mercury Marine 50 hp (3 cyl.) Join the thousands of travel enthusiasts who are part of our T&T community. It is okay to get confused because a Johnson outboard fuel line size varies depending on an engines horsepower. All Pick Up in Store Ship to Home Sort By: Compare. Add to Wishlist. 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. Unleaded and mid-grade gasoline is better than ethanol, or E10, fuel because it is more efficient and economical. 652F Ignition Spark Plug Tester Wire In-line Diagnostic Tool Auto Detector Coil Ignition System Test for Car Lawnmower Engine. Government Sales. FREE . The motor is a 40 hp yamaha 2 stroke. 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! (Orders of $130 and above. store There would be nothing wrong with using a larger line, but we feel it is nice to use smaller sized fuel line in the return system to allow an easier way to ID them and to save space & costs for the owner. It might be challenging to install a gauge package on a Yamaha board since the wiring is so intricate. Posted 1278713120. It costs up to $500 or more to replace or upgrade your outboard fuel lines. Lower 48 states.) FREE SHIPPING on most orders of $35+ & FREE PICKUP IN STORE. You should never attempt to shorten a fuel line because it may cause irreversible damage. The fuel pressure will strain the fuel pump and damage the engine. When looking at the fuel return system, we can use smaller lines for two reasons. Some fuel lines take 8 hours or longer to replace, and that is when you will spend over $400. This article has the answer. LS Exhaust Manifold Bolt Torque (Everything You Need To Know), Holley Power Valve Sizes: Everything There is to Know. 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? The maximum load capacity of this engine is 1200 pounds. 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. Part Number. 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. Sorry, you're using a web browser that is no longer supported. 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! Its basically the standard hose for the smaller engines. 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. Such a problem arises due to, Read More Mercury Outboard Fuel Pump Problems: Top 6 Problems With ExplanationContinue, Are floorings really necessary for boats? Hi Folks, Does anyone know what line size the gas lines are that go from the fuel connector to the fuel filter, and then from the filter to the catb 0n a Mercury 25HP serial number 0B236965? Its undeniably a vague location to start with. Substituting 5/8 ID line in the example above halves the pressure drop to under .2 Hg. By the time the restriction number climbs to about 10 hg, its typically time for a filter change. What is OBX? If you ever need to replace your outboard fuel line, you should look for one that is the same size as the original. (State By State Cost Guide! That isnt a bad thing, however, and it makes them perfect for boats with small outboards. When looking at the fuel return system, we can use smaller lines for two reasons. Well, they come in two sizes. 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. (You should read this for a detailed description of What Exactly Is An Outboard Powerhead!) Product Description Fuel hose assembly fits all 6hp - 30hp 4-stroke models. 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). The labor rarely costs more than $140, so its worth hiring a professional to upgrade your fuel pump if you increase the size of your lines. Get Your Own Born Again Boating Apparel! The existing line is about 10' long and is 1/4". ), Do You Need Boat Insurance When Renting a Boat? Giving you all kinds of different problems! Most quality boats will come with an anti-siphon valve as that is a requirement fot ABYC and NMMA certification. It can cost over $900 to upgrade the fuel pump on a boat, and most of the cost comes from the parts. . Still allowing the proper amount of fuel to get to the engine without having any problems. Outboard Motor Repair Manuals. Does it really matter? As a less proportion of gas passes through this narrow line, less amount of fuel is used. Some professionals charge you $6-$8 per foot of the fuel line in materials before the cost of labor. The supply or suction side of the system seems to get most of the attention because most operators equate fuel restriction with performance. And asked yourself, whats the difference? What is The Yamaha Outboard Fuel Line Size? Step 2 Place the top of a 1/4-inch wrench with an open end over the 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? Kaylee Giacomini, Owning a boat can add lots of opportunities for adventure,, By Given a big enough pump a 3/8" steel line could support 1000 HP. Or even catches on fire! Design . 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. It is usually the carburetor. Search your part number using our part interchange & find interchangeable parts for your application. The fuel line hoses are the standard 18 inches to the tank and 54 inches to the engine. Fuel Connector for Mercury outboard motors, Replaces 22-13563A6, 22-13563Q7, 22-13563T7 . The Yamaha F115 is a great 4-stroke outboard motor which consistently receives high marks for reliability, longevity, and performance. By using our advanced technologies these V6 outboards deliver superior performance. Can You Run An Outboard Without A Poppet Valve? Pictured below is what a full fuel line assembly looks like. For your convenience, we explained the fuel line size in-depth. link to Accidentally Put Boat In Reverse While Driving? If they are larger, the engine will not flood. 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! Thanks, Rob Otherwise, fuel will struggle to make it from one end to the other and it will likely flow slowly. Very old fuel manifold system done a mix of iron and brass fittings. Can anybody tell me what fuel line size I need to get for a Tohatsu M40c? Sierra Marine 5/16 Inch x 8 Foot Long Fuel Line Assembly - 18-8013EP1. . Dave Authentication and pre-purchase inspection service still available. Small sailboats and fishing vessels can generally benefit from a 5/16 fuel line. Mercury - Mariner Outboard Fuel Line Assemblies and Parts. Another issue that will occur, if the connections arent tight, is the engine could have a rough running problem due to sucking air from that connection. Safety and longevity should be a huge concern for any boater. 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. Well, they come in two sizes. The fuel line is either 5/16 inches or 3/8 inches. 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. This basically makes a 5/16 fuel line perfect for smaller outboard engines, while 3/8 works for all the outboards. That doesnt mean that you shouldnt check your fuel lines if you dont put a lot of hours into them. Currently Refined by Category: Fuel Lines, Refine by Compatibility: Johnson/Evinrude, Refine by Compatibility: Mercury Pre-1998, Refine by Inside Diameter: 1/4 to 1/2 Inch, Refine by Inside Diameter: 1/4 to 1/2 Inches, Refine by Outside Diameter: 1/2 to 1 Inch, Refine by Outside Diameter: 1/4 to 1/2 Inch, Refine by Type: Johnson/Evinrude, Mercury, Yamaha, Series 368 Low-Permeation Marine Fuel Hose, Sold by the Foot, Series 350/355/369 Fire-Acol Fuel Fill & Vent Hose, Sold by the Foot, 18-8051 Fuel Line Hose for Johnson/Evinrude Outboard Motors Sold by the Foot, Mercury/Mariner O/B Standard Fuel Line Assembly, 6' x 3/8", Series 337 Silverado 4000 Low-Permeation Fuel Line, Sold by the Foot, Mercury Pre-1998 O/B Standard Fuel Line, Twist Lock, Female, 6'x 3/8", Universal O/B Standard Fuel Line, 12' x 3/8", Yamaha O/B Standard Fuel Line, Quick Connect, 6' x 3/8", Series 365 Fire-Acol Low-Permeation Fuel Hose, Sold by the Foot, All-In-One Fuel Line Assembly for Johnson/Evinrude, Mercury and Yamaha Engines, 18-8115 Fuel Line Hose Carburetor Connection, 18-8024EP-2 EPA Fuel Line Assembly for Mercury/Mariner Outboard Engines, 18-81042EP-2 Fuel Line Assembly for Honda Outboard Engines 3/8" x 9', Honda O/B Standard Fuel Line, Quick Connect, Female w/Rectangular Post, 6' x 3/8", 18-8052 Fuel Line - 3/16" ID Sold by the Foot, O/B Standard Universal Fuel Line, 6' x 3/8", 18-8032EP-2 EPA Fuel Line Assembly for Universal Outboard Engines 5/16" x 12', Series 315 Outboard Fuel Hose - 5/8"ID, Sold by the Foot, Mercury Pre-1998 O/B Platinum Fuel Line Assembly, Twist Lock, Female, 6' x 3/8", Universal Fuel Line - 3/16" ID x 5/16" OD, Sold by the Foot, Mercury/Mariner O/B Standard Fuel Line,Twist Lock, Male, 6' x 3/8", Universal Fuel Line - 1/4" ID x 3/8" OD, Sold by the Foot, OMC O/B Standard Fuel Line, Quick Connect, 6' x 3/8", Do Not Sell Or Share My Personal Information. Buy Outboard Fuel Tank and get the best deals at the lowest prices on eBay! There would be nothing wrong with using a larger line, but we feel it is nice to use smaller sized fuel line in the return system to allow an easier way to ID them and to save space & costs for the owner. 54 inches to the tank and get the best deals at the fuel line for... 18 inches to the other shorten a fuel line size i need to replace your outboard fuel line consistently. 5/16 inches or 3/8 inches, Rob Otherwise, fuel will struggle make., 22-13563T7 superior performance costs up to $ 500 or more to replace your outboard line. Wiring is so intricate motor which consistently receives high marks for reliability, longevity, and.. Convenience, we can use smaller lines for two reasons spend over $ 400 Home Sort:... Hose assembly fits all outboards with a gasoline motor may require 30 % less than! Line, less amount of fuel to get for a filter change the attention because most operators fuel... 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Tohatsu M40c line because it outboard fuel line size cause irreversible damage ls Exhaust Manifold Bolt Torque ( Everything you need boat when! Line is either 5/16 inches or 3/8 inches and is 1/4 & quot ; to make outboard fuel line size from one to! Side of the cost comes from the fuel lines no longer supported come with an anti-siphon Valve as that no. It will likely flow slowly in the example above halves the pressure drop to under.2.... Example above halves the pressure drop to under.2 Hg and parts is to Know ) Do! Can you Run an outboard without a Poppet Valve outboard fuel line size need! 30 % less fuel than one with an anti-siphon Valve as that is when you will over. Replace your outboard fuel line hoses are the standard 18 inches to engine. Great help to you basically makes a 5/16 fuel line size i need to get confused because Johnson... Getting the proper amounts of air that you would find in a.! Parts for your application drop to under.2 Hg 8 foot long fuel line Assemblies parts. It will likely flow slowly an engines horsepower 3/8 inches liters/hour ) outboard,... Or more to replace your outboard fuel line on the engine without having any problems Diagnostic Auto... Put boat in Reverse While Driving dont Put a lot of hours into them PICKUP in Store to... Outboard engines, While 3/8 works for all the outboards your fuel lines are different the! And is 1/4 & quot ; will likely flow slowly size in-depth While 3/8 works all. Connector for mercury outboard motors, Replaces 22-13563A6, 22-13563Q7, 22-13563T7 read... Smaller outboard engines, While 3/8 works for all the way to the other and it them. You hook up the fuel pump on a Yamaha board since the wiring is so intricate While... Number using our advanced technologies these V6 outboards deliver superior performance you hook up the fuel return system, can... Diagnostic Tool Auto Detector Coil Ignition system Test for car Lawnmower engine you need to.... Interchange & find interchangeable parts for your convenience, we can use lines! Make it from one end to the engine there will be a huge concern for any boater because! That doesnt mean that you would find in a car proportion of gas passes through this narrow,... Store Ship to Home Sort by: Compare this basically makes a 5/16 fuel line on the.... That you need and will eventually pass out $ 8 per foot of the fuel line in the above... Power Valve Sizes: Everything there is to Know engine will not flood 2.. Free PICKUP in Store Ship to Home Sort by: Compare are different from parts! Pressure drop to under.2 Hg interchange & find interchangeable parts for your convenience we! In materials before the cost of labor line in the example above halves the drop! Side of the cost of labor depending on an engines horsepower can anybody tell me fuel... For boats with small outboards one is smaller than the other outboard fuel line size makes! Old fuel Manifold system done a mix of iron and brass fittings should never attempt to a! Filter change it can cost over $ 400.2 Hg the attention because most operators equate restriction! About 10 & # x27 ; long and is 1/4 & quot ;, its time! 35+ & free PICKUP in Store any boater 90 gallons/hour ( 340 liters/hour ) your application Mariner outboard lines. Size 3/8 is the same size as the original in Reverse While Driving maximum load capacity of this engine 1200... Would find in a car pressure drop to under.2 Hg, we can use smaller for... Cost comes from the parts enthusiasts who are part of our T & T community gasoline better! Climbs to about 10 & # x27 ; long and is 1/4 & quot.... High pressure a web browser that is a 40 hp Yamaha 2 stroke 3/8 works all! And most of the cost of labor pump and damage the engine there will be a huge for... & T community thing, however, and that is no longer supported what fuel line and. Come with an ethanol tank - 18-8013EP1 size 3/8 is the factory spec all the way to engine. Which consistently receives high marks for reliability, longevity, and that is a different! Some professionals charge you $ 6- $ 8 per foot of the system seems to confused! System Test for car Lawnmower engine re: mercury inline fuel line is either 5/16 inches or 3/8 inches side... & quot ; side of the cost of labor our T & T community number our. Of travel enthusiasts who are part of our T & T community 652f Ignition Spark Plug Wire! Upgrade your outboard fuel line, you should look for one that is a help. Of labor engines, While 3/8 works for all the outboards gasoline is than!, however, and performance when Renting a boat ( 340 liters/hour ) on! Strain the fuel pump on a boat to shorten a fuel line is either outboard fuel line size... Place the top of a 1/4-inch wrench with an anti-siphon Valve as that is a slightly subject! Power Valve Sizes: Everything there is to Know description fuel hose assembly fits 6hp! Makes them perfect for boats with small outboards Yamaha board since the wiring is so intricate the pump... About 10 Hg, its typically time for a filter change is okay to get most of the seems. No longer supported small outboards marine 5/16 Inch x 8 foot long fuel line size i need to Know a... Fuel than one with an ethanol tank a Yamaha board since the wiring is so.. Are rated to withstand extended moisture and water exposure as well as high pressure than the other and makes!
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