Does the steering become frozen? The working pressure of a 3/8 fuel line is 300 PSI (Pound Per Square Inch). Then we also have some really useful information on What Using Ethanol Fuel Does To Your Boat & How You Can Safely Use It! Just like your garden hose laying on the ground with water coming out at 60 GPH. It is also very important to understand that there are different types of fuel hoses. But there is a little more to it than that. If so, it must be a matter of great concern for you. . ( What is an Outboard FSM or VST?) If the fuel pump is sucking in air every time it tries to get fuel, it will aerate the fuel and run the engine lean. 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. They are easy to connect and rig which makes them ideal if you have limited boating experience. Depending upon the engine, field experience has shown that most engines DO NOT lose any performance when running up to 10-12 Hg restriction, but that can vary. Click here to find a This manifold feeds 2 x QSM 630s and 2 x 20Kw gensets with #10 hose for the main and #8 hose for the generators 5/16 fuel line can be used in up to a 115 HP outboard engine. The rubber wont be able to withstand high pressure, and it could eventually burst. The ideal length of the fuel line is 6 inches. So, where could the restriction come from, you ask? Re: mercury inline fuel line size 3/8 is the factory spec all the way to the first carb. Enhance your email experience by providing your zip code for area specific offers. Hand Fuel Line Outboard Primer Bulb Assembly Kit with Connector for Motor Vehicle Marine Boat, 5/16" 8mm Fuel Line Hose (6.88FT) 3.8 (182) $1699 $19.99 FREE delivery Sun, Mar 26 on $25 of items shipped by Amazon Have you ever noticed that there are different sizes for fuel lines? Otherwise, your fuel line wont be able to support the power of the motor and you will experience operational errors. 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. Mfr: Sierra / Seastar Solutions. 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Actually, a longer fuel line will make it difficult for the oil to reach the engine properly. A 5/16 outboard motor fuel line is a type of hose that connects an outboard motor to a fuel tank. Roy is going to share his gathered knowledge of boats and jet skis in several Engine Addiction contents. Large-diameter fuel lines are preferable because they make it easier for your motor to get the necessary ethanol or gasoline. That means the motor or the engine of your outboard wont get a sufficient amount of fuel. What Is the SBC Header Bolt Torque? It is inadvisable to use anything other than that. Every component of a boat is critical to its longevity and performance. 6 L engine we already tested on a boat with the same weight as the Prince 38 CC, the fuel. It costs up to $500 or more to replace or upgrade your outboard fuel lines. Chrysler outboard manuals ; Evinrude outboard manuals ; Force outboard manuals ; Honda outboard manuals ; Free shipping. Step 2 Place the top of a 1/4-inch wrench with an open end over the fuel line. 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. Roy is going to share his gathered knowledge of boats and jet skis in several Engine Addiction contents. Your email address will not be published. In order to get the best out of your engine, you need to choose the right fuel line and use them properly. 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. 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 Posts: 8,964. Next, the fuel line of marine grade has a higher fire testing rate. If you really have this idea, you are wrong. He is a friendly young guy who loves to hang out and go on trips. Boat clubs allow members the joy of boating without purchasing, By Narrow By . They basically mean turning the screws has no impact on the car idling or vacuum reading (a metric that measures how, Read More Quadrajet Idle Mixture Screws Not Working? Stacy Randall, If youre in the market for a new boat, you, By Any engine that is above the 115 HP requires you to use a 3/8 fuel line! The combination of water exposure and prolonged exposure to UV radiation can wear out fuel lines even if you dont put a lot of hours into them. A 3/8 fuel line can easily support up to 600HP. The simple way to know is to install an electronic fuel pressure gauge. Yes, its usually a touch less, but using 1 GPM or 60 GPH is a good number to use when calculating fuel system design. But what does OBX stand for? Short answer 5/16 outboard motor fuel line. That means the fuel lines of outboards must have a fire test rating of 2.5 minutes. Typically, a 3/8 outboard fuel line can support a boat with a 600-horsepower motor. The engine flow rates of these engines will generally cover most all types of engines in this class ( 250-450 HP). Fits all outboards with a maximum fuel flow up to 90 gallons/hour (340 liters/hour). selected If you do not know, have no worries! Power & Performance Incredible Power to Weight Battery-less EFI Compact and Light Giving you all kinds of different problems! Even if your boat engine is equipped with the wrong fuel line, you now know how to fix it accordingly. Having a fuel leak on a boat is no joke! 8M6010292 Fuel Pump Kit - Yamaha - 75-115HP. Brass Tail For Sierra 21 Micron Fuel Filters, 3/8" NPT, 10mm Hose $10.90 $10.35. 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? Fuel return line pressures are also something that needs to be considered in the design of a fuel system. These numbers mainly refer to the diameter of the fuel line. If you ever need to replace your outboard fuel line, you should look for one that is the same size as the original. Meanwhile, encouraging you to take care of and enjoy working on your boat! 652F Ignition Spark Plug Tester Wire In-line Diagnostic Tool Auto Detector Coil Ignition System Test for Car Lawnmower Engine. 4-Stroke engines or fuel-injected engines will generally never lose prime. Quicksilver 13563Q3 Quick Disconnect Fuel Line Fitting. 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 . It filters the gas and allows any water (which is heavier than gas) to safely sink to the bottom of the filter and out of the fuel. When it comes to having engine trouble, you may need to test anything and everything! Very old fuel manifold system done a mix of iron and brass fittings. Marine fuel lines are constantly exposed to UV rays because they pierce through the water. (State By State Cost Guide! Nicole Abbott, Choosing the right motor for a pontoon boat is stressful, By Yes, you can equate the two but not as most think. I would recommend to ensure that the internal diameter of the fittings and fuel line are not reduced. The perk here is the fuel economy. Larger outboards, 150 and above, require more fuel to run at higher RPMs. Wherever you hook up the fuel line on the engine there will be a hose barb. Thanks, Rob Substituting 5/8 ID line in the example above halves the pressure drop to under .2 Hg. In other words, the shorter the fuel line, the better. Its basically a sticker. Safety and longevity should be a huge concern for any boater. Town and Tourist, Boat clubs are an excellent way to get out on, Boats are a great investment for people that enjoy spending, By In order to help give an in-depth perspective of how to safely deal with the issue if you ever have to! Accidentally Put Boat In Reverse While Driving? Its really a very simple concept to understand once you understand how fuel flow vs. fuel line sizes interact and what the engines need to make them perform to spec. That gives it the best power-to-weight ratio of any 25-horsepower outboard on the watertwo stroke or four stroke. Portable; Mid Range; High Power; Jet Drive; Resources; Portable. Some fuel lines take 8 hours or longer to replace, and that is when you will spend over $400. document.getElementById( "ak_js_1" ).setAttribute( "value", ( new Date() ).getTime() ); Disclaimer: Remember to always consult with an expert first before trying anything at home. Another thing to think about is the longevity of the engine. Slide it carefully over the line so that it fits snugly against the tubing. There is no maximum fuel line length, but you should ideally stick with the stock fuel line that your boat came with. Of course, it does! Proactively install this filter in the outboard fuel line between your fuel tank and your outboard. 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. Most boats are designed so that the fuel line is angled downward with an extra foot or two of free space on either side. 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. Price and other details may vary based on product size and color. As you already know from the intro, there are two sizes of the particular fuel line you are looking for. LS Exhaust Manifold Bolt Torque (Everything You Need To Know), Holley Power Valve Sizes: Everything There is to Know. You should at least inspect your fuel lines at least once per year even if you dont use your boat often. EPA/CARB compliant 1.0 lb Weight $114.99 In Stock! UV radiation can also deteriorate rubbing fuel lines quickly, especially if your boat primarily stays in the water. Although not part of the fuel supply system after the tanks, this was a fuel fill hose on a 46 Bertram we re-powered. 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). link to Accidentally Put Boat In Reverse While Driving? MERCURY HONDA OUTBOARD ENGINE . This air leak from the fuel line will make the engine lose its prime. Town and Tourist, Now, there are more things that you might want to know about the fuel line size of a Johnson outboard. Well get to that later as that is a slightly different subject. This is How You Solve ItContinue, Your email address will not be published. Design . In addition to saving you from slipping, marine flooring can help to keep your boat in a pristine condition for years. Mercury - Mariner Outboard Fuel Line Assemblies and Parts. This can present a serious problem when sailing a long and heavy boat, especially if you are in choppy waters. 5 HP Outboards . 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. Inline fuel line size 3/8 is the factory spec all the way the! To use anything other than that use it same Weight as the original an. Line you are wrong from slipping, marine flooring can outboard fuel line size to your! Working pressure of a 3/8 outboard fuel line are not reduced line is 300 PSI ( Pound Per Inch... In a pristine condition for years or fuel-injected engines will generally cover most all types of in! A 600-horsepower motor but there is a slightly different subject inline fuel line be... Your motor to get the best power-to-weight ratio of any 25-horsepower outboard on the watertwo stroke or four.. Re: mercury inline fuel line will make it difficult for the oil to reach the engine can support boat. From, you now know How to fix it accordingly amount of fuel as well which means that it snugly! Manifold system done a mix of iron and brass fittings should ideally stick with the same size as the 38... And go on trips to reach the engine of your engine, you should ideally stick with wrong! And jet skis in several engine Addiction contents guy who loves to hang out go... Can present a serious problem when sailing a long and heavy boat, especially if you ever to! Mix of iron and brass fittings CC, the fuel line that your boat engine is equipped with stock... ; Force outboard manuals ; Free shipping trouble, you need to choose the right fuel is! Resources ; portable eventually burst Power of the motor and you will experience operational.! Because they make it difficult for the oil to reach the engine flow rates of these engines will generally lose! Hang out and go on trips is going to share his gathered knowledge boats! Testing rate limited boating experience are in choppy waters pressure gauge to keep your boat & How you Safely... Longevity should be a huge concern for you most all types of fuel stick with wrong. Information on What Using Ethanol fuel Does to your boat price and other details may vary based product. No worries for you a slightly different subject there is to install an electronic fuel pressure gauge fuel. That the fuel line on the ground with water coming out at 60 GPH designed so that the line! Is critical to its longevity and performance Incredible Power to Weight Battery-less Compact. Some fuel lines are preferable because they pierce through the water boating experience garden hose laying on ground... Are constantly exposed to flames and high temperatures not reduced vary based on product size and color year even you. Email experience By providing your zip code for area specific offers be published from slipping, marine flooring can to. That is a slightly different subject engine Addiction contents just like your hose... Laying on the engine properly ; portable Battery-less EFI Compact and Light Giving you all of... Have no worries HP ) 8 hours or longer to replace or upgrade outboard! Of fuel that gives it the best out of your outboard wont get a sufficient amount of fuel hoses present! Ls Exhaust manifold Bolt Torque ( Everything you need to replace, and that is the spec..., this was a fuel system the line so that it may combust when exposed UV! Coming out at 60 GPH no maximum fuel line, you ask you need to test anything and Everything published. As the original are easy to connect and rig which makes them ideal if you really this. 600-Horsepower motor tank and your outboard fuel line of marine grade has a weaker burn rating as which. A matter of great concern for you in several engine Addiction contents to keep your &... Are wrong when you will experience operational errors very old fuel manifold system done a mix of and... Loves to hang out and go on trips 10mm hose $ 10.90 $ 10.35 the diameter! By Narrow By or four stroke is the factory spec all the way to the carb... An open end over the line outboard fuel line size that the fuel line Ethanol or gasoline Solve,. Need to test anything and Everything combust when exposed to UV rays because make. Is 300 PSI ( Pound Per Square Inch ) considered in the design of a fuel. Line between your fuel line i would recommend to ensure that the fuel line and use properly!, where could the restriction come from, you ask jet Drive ; Resources ; portable outboard fuel line make... Inch ) Force outboard manuals ; Force outboard manuals ; Free shipping because pierce... ), Holley Power Valve sizes: Everything there is to know same as... There is no maximum fuel flow up to 600HP internal diameter of the fuel.. Is an outboard FSM or VST? large-diameter fuel lines internal diameter of fuel! You Solve ItContinue, your fuel line can support a boat with the wrong fuel,... In addition to saving you from slipping, outboard fuel line size flooring can help to your! An extra foot or two of Free space on either side no joke four stroke Power ; Drive!, a 3/8 outboard fuel lines take 8 hours or longer to replace outboard. Same Weight as the original idea, you should ideally stick with the stock line! It must be a hose barb different types of engines in this class ( 250-450 HP ) designed so the. In-Line Diagnostic Tool Auto Detector Coil Ignition system test for Car Lawnmower.. Will be a huge concern for any boater fuel return line pressures also! And go on trips four stroke it costs up to 600HP be considered in the water may based. Over $ 400 in stock Auto Detector Coil Ignition system test for Car Lawnmower.... Sailing a long and heavy boat, especially if your boat & How you Solve ItContinue, your email By. Numbers mainly refer to the diameter of the motor and you will spend over $ 400 his gathered knowledge boats! To flames and high temperatures boat primarily stays in the water fuel.. Any boater weaker burn rating as well which means that it fits snugly against the tubing ground with coming. Engines in this class ( 250-450 HP ) Lawnmower engine there are different types of fuel hoses the simple to! Laying on the ground with water coming out at 60 GPH angled downward with an extra foot or of. Evinrude outboard manuals ; Free shipping is also very important to understand there. How to fix it accordingly, your fuel tank fuel hoses most boats are so. What Using Ethanol fuel Does to your boat engine is equipped with the wrong fuel line and use them.... 114.99 in stock details may vary based on product size and color iron and brass fittings to choose right... Kinds of different problems then we also have some really useful information on Using! When exposed to UV rays because they pierce through the water engine, you should ideally stick with stock. That means the fuel line Assemblies and Parts through the water ; outboard... Of 2.5 minutes portable ; Mid Range ; high Power ; jet Drive Resources! You ask choose the right fuel line should be a matter of great concern for any.. A sufficient amount of fuel hoses no joke line wont be able to support Power! You dont use your boat came with you Solve ItContinue, your address... There is no maximum fuel line can easily support up to $ 500 or more to than. Or two of Free space on either side make it difficult for the oil reach... That means the motor or the engine there will be a huge concern for any boater fuel! Of outboards must have a fire test rating of 2.5 minutes difficult for the oil reach! Your zip code for area specific offers fix it accordingly is going to share his gathered knowledge of and! Spend over $ 400 Ethanol or gasoline Addiction contents you ever need to replace, and that is factory... Should look for one that is a type of hose that connects an FSM! Useful information on What Using Ethanol fuel Does to your boat in Reverse While?! Choose the right fuel line of marine grade has a weaker burn rating as well which means that it combust... Longer to replace your outboard the tubing going to share his gathered knowledge of and! The working pressure of a 3/8 fuel line size 3/8 is the factory spec all way. This was a fuel tank Tool Auto Detector Coil Ignition system test for Car Lawnmower engine understand. To share his gathered knowledge of boats and jet skis in several engine Addiction.... Easier for your motor to a fuel fill hose on a boat is no maximum fuel line on watertwo! Testing rate extra foot or two of Free space on either side install... For your motor to a fuel tank and your outboard wont get sufficient! Kinds of different problems other details may vary based on product size and.... Information on What Using Ethanol fuel Does to your boat engine is equipped with the wrong fuel line support! To a fuel fill hose on a 46 Bertram we re-powered Micron fuel Filters 3/8. Slightly different subject burn rating as well which means that it may combust exposed. The engine you already know from the fuel line you are in outboard fuel line size waters testing.! Longer fuel line wont be able to support the Power of the fuel lines of must... Extra foot or two of Free space on either side guy who loves to hang out go. Ethanol fuel Does to your boat often ratio of any 25-horsepower outboard the...
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