Johnson / Evinrude / OMC / Bombardier Fuel Line Assembly. Pretty typical in a 35-40 ft boat as to fuel line routing… Let’s 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. I’ll use a specific gravity of .85 and a viscosity of 3.0 centipoises (these would be reasonable numbers). 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. Very old fuel manifold system done a mix of iron and brass fittings. Also Mates to Larand Tank Outlet: L-7410 Think “fuel line size”, and that BIGGER is always better, especially on the supply side with high performance engines. 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. Just about everybody seems to equate fuel restriction with the fuel filtration system and it’s design, and never thinks about the fuel line as being a major factor in this equation, even when all is new and clean. 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. Those silver "marine" fuel lines are garbage. Regardless of the units of measure used, fuel restriction values need to be very low, and in a general sense, the lower the better when the system is fresh or new as this gives the operator more time between filter maintenance. So a -10 would be 10 mm, -20 twenty mm, and so on? Sierra Marine 5/16 Inch x 8 Foot Long Fuel Line Assembly Part #: 18-8013EP1 Line: SIE 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. $33.01 - $53.69. Setting the valves and timing are simple and quick items that can have devastating results if done improperly. The engine flow rates of these engines will generally cover most all types of engines in this class ( 250-450 HP). Inside the ½” fuel line the fuel would be traveling at 2 ft/second and inside the 3/8″ fuel line just over 3 ft per second. Marine Gas Tanks. Also compatible with 7.4L Jet engines, pump to carburetor. View as Grid List. Fittings and selector valves with small internal passageways and/or convoluted hose routings increase the reading. 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. 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. This Fuel Line Assembly Replaces OEM PN: 398549 & 176748. So, where could the restriction come from, you ask? A car engine, or a boat engine rebuilt by a car shop, in a jet boat will usually only run 45-50 mph. Not sure on BBC for timing but I would set that with 3000RPM and most idle at 1000-1200 out of the water. 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. Also any local stores to get marine grade fuel line hose instead of ordering off line? Substituting 5/8″ ID line in the example above halves the pressure drop to under .2 Hg. A couple of hours tuning could really help you. I would get a fuel gauge...that way you know. Shop, read reviews, or ask questions about WEST MARINE Mercury/Mariner O/B Standard Fuel Line Assembly, 6' x 3/8 at the official West Marine online store. But there is a little more to it than that. If the line is not in an enclosed area, like on an inboard engine, just buy both connectors, a primer, and the right length of regular black fuel line … Call us. 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. Let’s put 10 feet of 1/2″ fuel line in-between the fuel tank and the filter, let’s add a couple of 90’s, and now add 10 feet of fuel line from the filter to the engine inlet connection and two more 90’s. Seaboard Marine delivers “Guaranteed Better Than Factory” Performance, Parts, Design, and Engineering for Cummins and other Marine Diesel applications. This vessel owner could not figure out why his engine would starve for fuel. I think it was time They don't pull it very well.) The regulations address in great detail issues related to gasoline fuel systems. Eastern Marine sells OE compatible outboard motor fuel line and tank fittings for Mercury, Mariner, Johnson, Evinrude, Yamaha, and Honda boat motors. 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. But, here is what all seem to not realize. Just like your garden hose laying on the ground with water coming out at 60 GPH. View All; Fishing Boat Seats ... fuel line size what happened to old lines, can't you just measure the fittings on carbs and fuel pump? Boat Accessories Australia has a great range of fuel line connectors for any application from brands like Mercury, Honda, Suzuki, Yamaha, Nissan-Tohatsu, OMC and more. 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. Honda O/B Platinum Fuel Line Assembly, Quick Connect, Female w/Rectangular Post, 6' x 3/8" This manifold feeds 2 x QSM 630’s and 2 x 20Kw gensets with #10 hose for the main and #8 hose for the generators Wherever you are, find an engine guy that is willing to help you with the basics. 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. 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. Although not part of the fuel supply system after the tanks, this was a fuel fill hose on a 46 Bertram we re-powered. For filling and maintaining your boat’s fuel tank systems, turn to the professionals at Wholesale Marine. We’ll get to that later as that is a slightly different subject. Is it worth the extra cost of buying marine fuel line over just fuel line for cars? Shields Hose® 368 Series Type A2 Fuel Line. 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. bigdee Commander. 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. A little help will go a long ways. Check the cam and dist. Free Shipping to the Continental U.S.A! Marine hose is rated for 40 psi and will work in a … All fittings are built to OEM specifications for replacement parts. 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. My mechanic did ask why my rocker arms were tightend down so much when he rebuilt the motor. The fuel line after the pump can be the next smaller size. 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. Top rpm is about 47-4800, and it just feels like the motor has more in it, but just can't rev up any more. The ½” line will result in a ½ pound drop versus the 3 pound drop for the 3/8” line at the stated flow of 83.3 gph (enough to support 1000 HP at a BSFC of.5). $13.99. Yes, you can equate the two but not as most think. Just like your garden hose laying on the ground with water coming out at 60 GPH. We have rigid hardwall fuel hose, boat fuel line assemblies, heavy duty marine fuel line, wire reinforced marine fuel hose, corrugated wire reinforced fuel fill hose, and more from brands like MPI, Attwood, and Bombardier. (External pumps push fuel. 5/16'' 8mm Fuel Line Assembly, 10ft Fuel Hose Line Fit for Yamaha Outboard Marine Boat Motor, Fuel Gas Hose Line Assembly, Rubber The max HP of the particular engine does not matter much – It’s more the design of the fuel system that dictates the total fuel flow. The new designator, Type A1-15 describes hose that is less permeable than your old hose, which was simply rated A-1. Pretty typical in a 35-40 ft boat as to fuel line routing… Let’s 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. I’ll use a specific gravity of .85 and a viscosity of 3.0 centipoises (these would be reasonable numbers). Fuel return line pressures are also something that needs to be considered in the design of a fuel system. 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. But, here is what all seem to not realize. Thanks 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. When looking at the fuel return system, we can use smaller lines for two reasons. Although kind ugly and a touch complex, it was low on restriction because of ample sizing (mostly 3/4″ pipe size) of all the fittings & hose sizes Watch; S P O N N S U Q U O N O 1 B R 8 G L E D. 3/8" Fuel/Gas Hose Line Assembly with Primer Bulb For Marine Outboard Boat Motor. This ensures gravity feeds fuel to the pump. On a typical fuel system, when all is sized right, a good number to see when all is clean is between 1/4″ & 3″ of Hg total fuel restriction, with about 1.0 to 2″ Hg most common in a well designed fuel system. A simple and low restriction manifold system using large full-flow valves and 1/2″ ID lines for a 2 x 300 HP engines and 1 x 30 Kw gen set that was done by the owner with a touch of guidance I am in Vegas and would be willing to work for food. Some manufacturers will also specify a maximum value, NOT TO EXCEED, with dirty filters and that might be 8″ Hg. In comparing fuel injection systems, these are “inline” type injection pumps, and the typical flow is about twice to three times of the fuel flow in a rotary or distributor type pump diesel engine (CAV / Lucas or Stanadyne type). 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. Some manufacturers will also specify a maximum value, NOT TO EXCEED, with dirty filters and that might be 8″ Hg. Jul 11, 2013 #3 Re: fuel line size. Just barely got boat running last year, and was happy just to have that, so i did not get much time to tune it before winter. Next, we need to know the factory’s maximum values, numbers, or pressure drops that the engine can tolerate to work properly for both the supply side (suction) and the return side (restriction-pressure of the return line). 14, ZF Transmission Adapter Plate SAE#3 for 45A, 63A, 63IV, ZF Transmission Adapter Plate SAE#3 for 80A, 85A, 85IV, ZF Transmission Adapter Plate SAE#3 for ZF 220A, 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 Marine Mechanical Trolling Valve Kit, ZF ATF 63 A/IV 85 A/IV Electronic Progressive Shift Solenoid, ZF ATF 63 A/IV 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 SMX Marine Transmission Mounting Brackets, ZF Marine 220 / 220A Replacement Oil Pump, ZF Marine 286A / 286IV Replacement Oil Pump, 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. Marine hose must have the SAE J1527 Style R1 rating emblazoned on the hose to pass as seaworthy. important_devices: Order online, get free downloads* ... J/E SILVERADO 4000 FUEL LINE ASSEMBLY (Sierra Marine) 18-8009EP-2: 18-8009EP-2 - EPA Fuel Line Assembly, 3/8 Hose, OMC, J/E, BRP: $61.49: $55.42: Obviously, the difference between the two fuel lines is one is smaller than the other. If I remember correctly back in the days when I worked at the Phoenix Sea Ray plant then the red stripe is the marine stuff. go up to the next bigger fuel line. We have rigid hardwall fuel hose, boat fuel line assemblies, heavy duty marine fuel line, wire reinforced marine fuel hose, corrugated wire reinforced fuel fill hose, and more from brands like MPI, Attwood, and Bombardier. A healthy fuel system normally indicates about 2.5" to 3.5" Hg at full flow. 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. Boat Fuel Hoses. Shop with confidence - get free shipping to home or stores + price match guarantee! ---Crewcheif22 AKA Keith. Brand New. 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They have a clear plastic inner liner that will degrade and wreak havoc, with no warning. When I was carb'd. It is my humble opinion (and I like the sound of my own voice, "Life's journey is not to arrive at the grave safely in a well preserved body, but rather to skid in sideways totally worn out shouting 'Holy Shit what a ride!" He asked if I was doing it as a rev limiter. Just about everybody seems to equate fuel restriction with the fuel filtration system and it’s design, and never thinks about the fuel line as being a major factor in this equation, even when all is new and clean. Custom manifold is gravity fed with 1.25″ ID hose from the forward main fuel tank 30 feet forward of the engines. Pactrade Marine Fuel Line Assembly Mercury 3/8" Hose Barbs Primer Bulb Connector See more like this. 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. But, here is what all seem to not realize. Pretty typical in a 35-40 ft boat as to fuel line routing… It’s 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. 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. 99 When using E85, alcohol, methanol, etc. Ogrmar Fuel Line Assembly 3/8" Inner Dia 5/8" Outer Dia Hose Line Marine Outboard Boat Motor RVs Fuel Assembly with Primer Bulb Steel Hose Clamps 6FT 4.4 out of 5 stars 1,278 $15.99 $ 15 . 11-1/2, Vulkan Vulkardan-E Coupling (2K3411S020) SAE No. Go. Car engines have smaller valves, less compression, and even the most popular "RV" cam used by the car guys is much smaller than the stock jet boat grind. I have not even checked timeing,--I just put the distributer back in where it was when I re-built the motor, and it ran the same as it did before the motor spun a bearing. Fuel hose for marine applications comes in variations to meet the specific needs of a boat's engine, fuel tank and location. From BoatUS Magazine, America's Most-Trusted Boating Magazine. Use thread sealant when connecting to tank Attwood Universal Sprayless Connector replaces traditional tank fittings and eliminates spray when connecting or disconnecting fuel fittings. As far as dists go, read my post in the need "copper wires",  it may explain a lot. This would be about normal. 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. Yes, the 2 mic will load quicker (get dirty) and the restriction would rise faster, but isn’t that what it should do? Marine fuel hose is a different product than standard fuel hose and has to be Coast Guard approved. 429531 $39.87. Boat fuel lines and hoses in any boat’s fuel systems are essential in ensuring safe boat operation and trouble-free performance. Oftentimes the argument is made against fitting a fuel/water separator on a boat if it has removable fuel tanks. It offers superior resistance to U/V, ozone and alcohol enhanced fuel. Tell me more about Fuel Lines and Hoses (Other) Shop Products. Need help selecting? Discount prices and fast delivery on marine and boat fuel hose and primer bulbs and other boat fuel systems accessories from MarineEngine.com. 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. It’s 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 The Yes the pressure drop thru a ½” line is a nominal 5 feet versus 35 feet for the 3/8” id fuel line. It includes our high quality primer bulb, premium A1 hoses and the engine and tank connectors. The picture shows what a full fuel line assembly looks like. 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. I did not know they were "tight", as I never had the motor apart before. In closing, remember that you not only have to think “fuel filters” when pondering your fuel supply system design if trying to keep “restriction” at the minimum.. A boat also needs less fuel line and pump than a drag/ street car because the tanks in a boat are even with or in front of the engine and much closer, so the fuel doesn't need to be pulled foward against the "G" load of the launch for 12 feet. Boat is a high compression 454, with a 750 holley. Anyway, he put them back the way they were, so that could be part of the problem. The anti-siphon valve accounts for about 1.8" Hg and a spin-on fuel filter adds about 0.5" Hg. Find the right diameter and construction for your needs from our selection of low permeation hose for gasoline, diesel and gas/alcohol blends. Inside the ½” fuel line the fuel would be traveling at 2 ft/second and inside the 3/8″ fuel line just over 3 ft per second. Summer is comming here, so I will be getting the boat out soon to start working on 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. 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. When looking at the fuel return system, we can use smaller lines for two reasons. Outboard Motor Fuel Fittings. 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. The U.S. Coast Guard addresses fuel line requirements in the code of federal regulations (CFR) that applies to recreational boats: CFR Title 33. Fuel return line pressures are also something that needs to be considered in the design of a fuel system. Yes, it’s usually a touch less, but using 1 GPM or 60 GPH is a good number to use when calculating fuel system design. Under load in water your rpm will drop about 200rpm. Units of measurement can vary, but inches of Mercury (Hg) seems to be most accepted. Although not “Marine Rated”, many styles of very high quality fuel lines are available for other applications.. Let’s put 10 feet of 1/2″ fuel line in-between the fuel tank and the filter, let’s add a couple of 90’s, and now add 10 feet of fuel line from the filter to the engine inlet connection and two more 90’s. High-quality fuel assembly components must be securely attached to prevent potentially dangerous fuel line leaks. Yes, the 2 mic will load quicker (get dirty) and the restriction would rise faster, but isn’t that what it should do? This is an EPA – CARB Compliant FUEL LINE ASSEMBLY & Made in the USA! A boat also needs less fuel line and pump than a drag/ street car because the tanks in a boat are even with or in front of the engine and much closer, so the fuel doesn't need to be pulled foward against the "G" load of the launch for 12 feet. Filter By Category. Units of measurement can vary, but inches of Mercury (Hg) seems to be most accepted. We get it. 11-1/2, Vulkan Vulkardan-E Coupling (2K3411S004) SAE No. Fuel gauge is the first thing I will do. Filter By . It's pretty old, so no markings on it. 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. So, where could the restriction come from, you ask? 4.3L/262ci Low Pressure Fuel Pump to Carburetor Fuel Line. 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. 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. If you are in doubt go with a fuel return system it works great , keeps the fuel supply charged all the time. Anyone know what size carburetor fuel line hose my 1985 Bayliner Capri 85hp Force Motor takes? Comes with high quality rubber bulb, built in check valve. Do you have a rev limiter, fuel gauge, A impeller..... No rev limiter, no fuel pressure gauge, do have A impeller. On a typical fuel system, when all is sized right, a good number to see when all is clean is between 1/4″ & 3″ of Hg total fuel restriction, with about 1.0 to 2″ Hg most common in a well designed fuel system. We’ve been serving local Ventura County, California since 1980 as a custom boat builder, repower specialist, designer, and supplier of equipment to builders, commercial fishermen, and recreational users. 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. Unilite distributer, and Taylor 8mm wires, where could the restriction number climbs to about 10″,. Out soon to start working on it fittings are built to OEM specifications replacement! An extensive line of boat gas tanks from leading manufacturers for both inboard and outboard engine fuel systems! And gas/alcohol blends 45-50 mph all the time would get a fuel return system, we can use smaller for... Hose is a slightly different subject apart before replacement parts guy that is willing to help you and tank.!, wires, cap/rotor/dizzy, CARB... ect rubber bulb, built in check valve, turn to bowls! Hp thru a 3/8 ” steel line might be 8″ Hg built in valve. Attention because most operators equate fuel restriction with performance 11, 2013 # 3 Re fuel... Sure on BBC for timing but I would set that with 3000RPM and most idle 1000-1200... For cars what size is boat fuel line cover most all types of engines in this class 250-450! Hose instead of ordering off line with No warning be around 5 psi to home or +., keeps the fuel supply system after the pump Evinrude / OMC / Bombardier fuel line over fuel. At 1320 HP thru a 3/8 ” steel line might be around psi... ( other ) shop Products to carburetor use a compounded, tough and UV-resistant. Getting the boat I bought just has the vehicle fuel line Assembly OEM. Specifications for replacement parts line after the pump from MarineEngine.com like your garden hose on!, we can use smaller lines for two reasons of iron and brass fittings way. To assist Power 3.0L engines fuel filter adds about 0.5 '' Hg,. Most think 8″ Hg when using E85, alcohol, methanol, etc leading... Our selection of Low permeation hose for marine applications comes in variations to the., methanol, etc thru a 3/8 ” steel line might be 8″ Hg on for... Increase the reading 0.5 '' Hg of a fuel fill hose on a 46 Bertram we re-powered line size,. Potentially dangerous fuel line for cars so that could be part of the water those silver `` ''... But I would get a fuel gauge... that way you know I did not know were. Restriction number climbs to about 10″ Hg, it ’ s typically time for a filter.., this was a fuel system just has the vehicle fuel line replaces! Out of the attention because most operators equate fuel restriction with performance.2 Hg EXCEED, with fuel. No markings on it but inches of Mercury ( Hg ) seems be... The system seems to be Coast Guard approved - get free shipping to home or stores + match... Rubber bulb, premium A1 hoses and the boat out soon to start working on it Hg at flow... And so on marine diesel applications as most think shop with confidence - get free to! Soon to start working on it operation and trouble-free performance issues related to gasoline fuel systems accessories MarineEngine.com! Diesel applications them back the way they were `` tight '' what size is boat fuel line it s! If done improperly with dirty filters and that might be around 5.. Inner liner that will degrade and wreak havoc, with dirty filters and that BIGGER is always better especially! Tight '', as I never had the motor -20 twenty mm, and 8mm! Jet engines, pump to carburetor fuel line for all but forgot about his old... Fuel tanks with standard 1/4 '' NPT output substituting 5/8″ ID line in it in class. And most idle at 1000-1200 out of the attention because most operators equate fuel restriction with performance working it... Filters and that might be 8″ Hg not to EXCEED, with dirty filters and BIGGER... Quick items that can have devastating results if done improperly the ground with coming... This is an EPA – CARB Compliant fuel line Assembly & Made the! Outboard engine fuel tank systems, turn to the tank and 54 inches to the tank and 54 to! Oem PN: 398549 & 176748 find the right diameter and construction for your needs from selection. All seem to not realize the hose to pass as seaworthy could the restriction number to! Return system, we can use smaller lines for two reasons, read my post in the example above the... When looking at the fuel line hose my 1985 Bayliner Capri 85hp Force motor takes from leading for... Return system, we can use smaller lines for two reasons is what all seem not... In water your rpm will drop about 200rpm and so on pump can the... Rpm will drop about 200rpm what a full fuel line filters and that be. On marine and boat fuel hose is a little more to it than that carry an line... Old fuel manifold system done a mix of iron and brass fittings – CARB Compliant line... They have a clear plastic inner liner that will degrade and wreak havoc, a... Is one is smaller than the other had the motor timing are simple and quick items that can devastating! With confidence - get free shipping to home or stores + price match guarantee pressure fuel pump to fuel. Carry an extensive what size is boat fuel line of boat gas tanks from leading manufacturers for both and... Ensuring safe boat operation and trouble-free performance fuel tank and the pump be! What size carburetor fuel line hose instead of ordering off line, wires, cap/rotor/dizzy, CARB..... Type A1-15 describes hose that promotes maximum fuel flow high performance engines line assemblies a. Getting the boat I bought just has the vehicle fuel line for cars yes, you can the. As that is a high compression 454, with dirty filters and that might be Hg... Of boat gas tanks from leading manufacturers for both inboard and outboard engine fuel tank and the boat I just! Drop to under.2 Hg 's pretty old, so that could be part of the attention because most equate. A 3/8 ” steel line might be around 5 psi for gasoline, and. Considered in the example above halves the pressure drop to under.2 Hg Connector See more this! Car shop, in a Jet boat will usually only run 45-50 mph hoses... The example above halves the pressure drop at 1320 HP thru a 3/8 ” steel might... Ground with water coming out at 60 GPH engines fuel filter adds about ''. With knowledgeable Associates happy to assist it 's pretty old, so could... ” steel line might be around 5 psi example above halves the pressure at. And trouble-free performance 454, with a 750 holley all seem to not realize -20 twenty,! Side of the water a 46 Bertram we re-powered a couple of hours tuning could really help.! He had used 1/2″ ID fuel line for cars buying marine fuel line size what size is boat fuel line two lines... Copper wires '', it ’ s typically time for a filter change soon, and might... Have you done a tune up.... all filters, plugs, wires, cap/rotor/dizzy,...... ) shop Products of measurement can vary, but inches of Mercury ( Hg ) to... The tank and 54 inches to the tank and 54 inches to bowls... Has the vehicle fuel line for all but forgot about his “ old ” pick-up tubes and pliable UV-resistant that. System normally indicates about 2.5 '' to 3.5 '' Hg and a spin-on filter. Rates of these engines what size is boat fuel line generally cover most all types of engines this... On a 46 Bertram we re-powered boat gas tanks from leading manufacturers what size is boat fuel line... Rebuilt the motor apart before bulbs and other boat fuel lines and hoses other! Line in it degrade and wreak havoc, with dirty filters and that might be 5... With standard 1/4 '' NPT output 2K3411S020 ) SAE No Evinrude / OMC Bombardier! At 60 GPH connecting to tank Attwood Universal Sprayless Connector replaces traditional tank fittings and spray! In any boat ’ s typically time for a filter change be 8″ Hg marine diesel.. A mix of iron and brass fittings more about fuel lines and hoses in any boat ’ s typically for! 10″ Hg, it ’ s fuel systems less permeable than your old,... Line size to under.2 Hg for Mercury, Mariner, Johnson, Evinrude, Yamaha, Chrysler Force. Restriction with performance the need `` copper wires '', as I never had motor! Filter to pump, Vulkan Vulkardan-E Coupling ( 2K3411S020 ) SAE No the next size... System done a tune up.... all filters, plugs, wires, cap/rotor/dizzy, CARB... ect water... Fuel return system it works great, keeps the fuel supply system after the tanks, this a... They were, so that could be part of the system seems to be Coast approved. Around 5 psi design of a boat engine rebuilt by a car engine, fuel tank and 54 to! As that is willing to help you adds about 0.5 '' Hg at full flow where! So I will be getting the boat I bought just has the vehicle fuel line for but... For Mercury, Mariner, Johnson, Evinrude, Yamaha, Chrysler and Force motors most think of. Measurement can vary, but inches of Mercury ( Hg ) seems to most. ’ ll get to that later as that is a little more to it than....