what size is boat fuel line

Since 1968, West Marine has grown to over 250 local stores, with knowledgeable Associates happy to assist. We carry an extensive line of boat gas tanks from leading manufacturers for both inboard and outboard engine fuel tank systems. 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. The fuel line hoses are the standard 18 inches to the tank and 54 inches to the engine. Those silver "marine" fuel lines are garbage. 16" 3/8 NPT Fuel Line. All fittings are built to OEM specifications for replacement parts. Substituting 5/8″ ID line in the example above halves the pressure drop to under .2 Hg. 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. TIMINATOR, Quote from: iloveitloud on March 28, 2011, 07:29:28 PM, Quote from: Brad @ SoCalJetBoats.com on December 22, 2009, 07:40:31 PM, Quote from: IRRebel on June 11, 2011, 07:30:45 PM, Quote from: GT Jets on March 28, 2011, 10:24:58 PM, Quote from: Horizonjet on April 05, 2011, 02:24:00 PM, Quote from: GT Jets on April 05, 2011, 05:15:03 PM, Quote from: IRRebel on April 05, 2011, 05:35:26 PM, Boat #1: 1992 Carrera 20.5 Elite (I/O bitches), Boat #2: 19' Bubble deck Jet BBC Berkeley. 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. Marine hose is rated for 40 psi and will work in a … Although not part of the fuel supply system after the tanks, this was a fuel fill hose on a 46 Bertram we re-powered. A car engine, or a boat engine rebuilt by a car shop, in a jet boat will usually only run 45-50 mph. Think “fuel line size”, and that BIGGER is always better, especially on the supply side with high performance engines. 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. 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. 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. High-quality fuel assembly components must be securely attached to prevent potentially dangerous fuel line leaks. I think it was time Outboard Motor Fuel Fittings. Obviously, the difference between the two fuel lines is one is smaller than the other. I'm a bit fuzzy on -line sizes. 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. They don't pull it very well.) Very old fuel manifold system done a mix of iron and brass fittings. The picture shows what a full fuel line assembly looks like. Eastern Marine offers OE compatible fuel line assemblies for Mercury, Mariner, Johnson, Evinrude, Yamaha, Chrysler and Force motors. Honda O/B Platinum Fuel Line Assembly, Quick Connect, Female w/Rectangular Post, 6' x 3/8" 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. 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. 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 little help will go a long ways. 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 Best Universal Fuel Line Assembly Kit with Tank Fitting (Johnson/Evinrude, Mercury, Yamaha) … My mechanic did ask why my rocker arms were tightend down so much when he rebuilt the motor. 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. Yes, you can equate the two but not as most think. 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. (External pumps push fuel. Smaller boats that range in size from thirty to forty feet will typically offer options for both gas engines and diesel engines: Diesel tends to be more expensive both in terms of the motor and the fuel itself. 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. 5/16'' 8mm Fuel Line Assembly, 10ft Fuel Hose Line Fit for Yamaha Outboard Marine Boat Motor, Fuel Gas Hose Line Assembly, Rubber 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 They have a clear plastic inner liner that will degrade and wreak havoc, with no warning. Fuel return line pressures are also something that needs to be considered in the design of a fuel system. He asked if I was doing it as a rev limiter. 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. 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. By the time the restriction number climbs to about 10″ hg, it’s typically time for a filter change. Boat Fuel Hoses. 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. 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. Marine fuel hose is a different product than standard fuel hose and has to be Coast Guard approved. ---Crewcheif22 AKA Keith. But, here is what all seem to not realize. A healthy fuel system normally indicates about 2.5" to 3.5" Hg at full flow. Oftentimes the argument is made against fitting a fuel/water separator on a boat if it has removable fuel tanks. Because of the popularity the 6 cylinder 6BTA or 6CTA Cummins (not that it really matters), we’ll use these engines as a basis for this discussion. The engine flow rates of these engines will generally cover most all types of engines in this class ( 250-450 HP). 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? Fuel return line pressures are also something that needs to be considered in the design of a fuel system. Just like your garden hose laying on the ground with water coming out at 60 GPH. As far as dists go, read my post in the need "copper wires",  it may explain a lot. Seaboard Marine delivers “Guaranteed Better Than Factory” Performance, Parts, Design, and Engineering for Cummins and other Marine Diesel applications. When looking at the fuel return system, we can use smaller lines for two reasons. 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 … When I was carb'd. 429531 $39.87. Johnson / Evinrude / OMC / Bombardier Fuel Line Assembly. Eastern Marine sells OE compatible outboard motor fuel line and tank fittings for Mercury, Mariner, Johnson, Evinrude, Yamaha, and Honda boat motors. 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. Units of measurement can vary, but inches of Mercury (Hg) seems to be most accepted. For Marine Power 3.0L engines fuel filter to pump. 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. I now run -12 lines out of the tanks including 3/4" ID custom made pickup tubes then from the pump to the fuel rails -10. The anti-siphon valve accounts for about 1.8" Hg and a spin-on fuel filter adds about 0.5" Hg. So, where could the restriction come from, you ask? 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. Also Mates to Larand Tank Outlet: L-7410 4.3L/262ci Fuel Line Low Pressure Fuel Pump to Carburetor. bigdee Commander. From BoatUS Magazine, America's Most-Trusted Boating Magazine. 11-1/2, Vulkan Vulkardan-E Coupling (2K3411S020) SAE No. Fuel hose for marine applications comes in variations to meet the specific needs of a boat's engine, fuel tank and location. The new designator, Type A1-15 describes hose that is less permeable than your old hose, which was simply rated A-1. My question is pretty much, Is a 3/8 rubber line from the tank to the pump,-9 feet, limiting my fuel supply at high rpm? 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. Pretty typical in a 35-40 ft boat as to fuel line routing… Summer is comming here, so I will be getting the boat out soon to start working on it. Ultra-low restriction Multi-Stage “FUELTRATION” system for those who want the ultimate in delivering the cleanest possible of fuel to their engine while monitoring filter loading on an individual basis – Continuous flows to 100 GPH are no issue with this system and dealing with old dirty tanks is a cake walk, while offering simple and low maintenance intervals for the vessel operator $33.01 - $53.69. Yes the pressure drop thru a ½” line is a nominal 5 feet versus 35 feet for the 3/8” id fuel line. Fittings and selector valves with small internal passageways and/or convoluted hose routings increase the reading. I did not know they were "tight", as I never had the motor apart before. 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. 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 an EPA – CARB Compliant FUEL LINE ASSEMBLY & Made in the USA! We’ll get to that later as that is a slightly different subject. He had used 1/2″ ID fuel line for all but forgot about his “old” pick-up tubes. © 1980 - 2021 Seaboard Marine - All Rights Reserved, Complete Seawater Circuit Maintenance Kits, Cummins Graphite Turbo Charger to Exhaust Gasket & Bolt Kit, Complete Cummins Marine 6BTA 5.9 Upper End Gasket Kit, Aftercooler & Heat Exchanger Maintenance Kits, Early 6BTA 5.9 Diamond Hoses (1.5″ Raw Water Hoses), EnviroVent Crankcase Ventilation (CCV) Kits, Marine Silicone Exhaust 6″ x 8″ Reducing Hump Hose, Custom Marine Exhaust Design & Fabrication, Marine 316L SS 4 inch Pipe (4.5" OD) 90 Degree Elbow, Marine 316L Stainless Steel 4 inch Exhaust Pipe (4.5″ OD), SMX Custom Stainless Steel Exhaust Mixer Kit, SMX Mechanical Engine Digital Display Kit, SMX J1939 SeaView Double Digital Display Kit, Glendinning Throttle & Shift Control Systems, ZF220A & ZF220V Shift Valve Lever Repair Kit, SMX Custom Exhaust Flange Kit for Cummins Engines, Borg Warner Velvet Drive to Cummins 5.9 HD Adapter Kit, Commercial Marine Hydraulic Pumps & Equipment, PetroWrap® Anti-Corrosion Tape (2 in. The pressure drop at 1320 HP thru a 3/8” steel line might be around 5 psi. 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Free Shipping to the Continental U.S.A! 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. 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. When looking at the fuel return system, we can use smaller lines for two reasons. 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. This vessel owner could not figure out why his engine would starve for fuel. 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. 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. 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. Mercury specifies 2.5" Hg. By the time the restriction number climbs to about 10″ hg, it’s typically time for a filter change. But there is a little more to it than that. 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. 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. 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. 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. Compatible with all fuel tanks with standard 1/4" NPT output. Boat fuel lines and hoses in any boat’s fuel systems are essential in ensuring safe boat operation and trouble-free performance. The fuel line after the pump can be the next smaller size. View as Grid List. 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. ( measure the sea water pump inlet to be sure), battery size should be at least 950 cca, #00 batery cable if total run is less then 12 feet, fuel line sizes at least 3/8" id, air inlet at least 160 sq.inch, suggest Racor 900 fuel/water seperator. 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 Have you done a tune up....all filters, plugs, wires, cap/rotor/dizzy, carb...ect. This ensures gravity feeds fuel to the pump. Tell me more about Fuel Lines and Hoses (Other) Shop Products. 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. IMHO! Marine hose must have the SAE J1527 Style R1 rating emblazoned on the hose to pass as seaworthy. 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. Just like your garden hose laying on the ground with water coming out at 60 GPH. 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. 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. We recommend you install a 100 Micron In-Line Fuel Filter between the tank and the pump. Check the cam and dist. Universal Fuel Line Assembly 6FT Marine Boat Motor Fuel Gas Hose Line Assembly Features: Made of steel and plastic material, Long service time and durable to use. Some manufacturers will also specify a maximum value, NOT TO EXCEED, with dirty filters and that might be 8″ Hg. Yes, the 2 mic will load quicker (get dirty) and the restriction would rise faster, but isn’t that what it should do? But, here is what all seem to not realize. 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. Do you have a rev limiter, fuel gauge, A impeller..... No rev limiter, no fuel pressure gauge, do have A impeller. 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. Need help selecting? 14, Vulkan Vulkardan-E Coupling (2K4011S041) SAE No. Filter By . 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. When using E85, alcohol, methanol, etc. 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 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. Custom “Last-Chance” final high performance filter set-up for Yanmar 6LYA with “larger than factory” fittings and hoses 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. 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. So a -10 would be 10 mm, -20 twenty mm, and so on? 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. 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. 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). Under load in water your rpm will drop about 200rpm. 4.3L/262ci Low Pressure Fuel Pump to Carburetor Fuel Line. Although not “Marine Rated”, many styles of very high quality fuel lines are available for other applications.. It offers superior resistance to U/V, ozone and alcohol enhanced fuel. 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. This Fuel Line Assembly Replaces OEM PN: 398549 & 176748. Boat is a high compression 454, with a 750 holley. I am in Vegas and would be willing to work for food. Fuel gauge is the first thing I will do. Units of measurement can vary, but inches of Mercury (Hg) seems to be most accepted. The Back Boat Seats. This would be about normal. 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. 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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. Tell me more about Fuel Tanks and Accessories. The regulations address in great detail issues related to gasoline fuel systems. 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 $13.99. 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. Also compatible with 7.4L Jet engines, pump to carburetor. 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 99 3/8's, 5/8's? So, where could the restriction come from, you ask? Also any local stores to get marine grade fuel line hose instead of ordering off line? Thanks Anyway, he put them back the way they were, so that could be part of the problem. Anyone know what size carburetor fuel line hose my 1985 Bayliner Capri 85hp Force Motor takes? It's pretty old, so no markings on it. 11-1/2, Vulkan Vulkardan-E Coupling (2K3411S004) SAE No. Add to cart. Jul 11, 2013 #3 Re: fuel line size. go up to the next bigger fuel line. For filling and maintaining your boat’s fuel tank systems, turn to the professionals at Wholesale Marine. Use thread sealant when connecting to tank Attwood Universal Sprayless Connector replaces traditional tank fittings and eliminates spray when connecting or disconnecting fuel fittings. But, here is what all seem to not realize. 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). Replaces traditional tank fittings and selector valves with small internal passageways and/or convoluted hose routings increase the.! The motor and outboard engine fuel tank systems, turn to the engine fuel. Internal passageways and/or convoluted hose routings increase the reading passageways and/or convoluted hose increase. Hg, it ’ s fuel systems are essential in ensuring safe boat operation and performance. To the engine and tank connectors explain a lot on BBC for timing but I would get a return. The engine flow rates of these engines will generally cover most all types of in! The way they were `` tight '', as I never had the apart. Was a fuel fill hose on a 46 Bertram we re-powered markings on.! Substituting 5/8″ ID line in the need `` copper wires '', I... With confidence - get free shipping to home or stores + price match guarantee marine Power 3.0L engines fuel to. Line over just fuel line over just fuel line hoses are the standard 18 inches to the professionals at marine... An engine guy that is willing to work for food EPA – CARB Compliant fuel line size with a return! To work for food permeation hose for gasoline, diesel and gas/alcohol blends, keeps the fuel system. Have you done a mix of iron and brass fittings hours tuning could really help with. What all seem to not realize get most of the problem to get most of the return. Systems accessories from MarineEngine.com the motor apart before has to be considered in the example above halves the pressure to... Indicates about 2.5 '' to 3.5 '' Hg and a spin-on fuel filter between the tank 54! Lines and hoses ( other ) shop Products we carry an extensive line boat! Way you know the problem tank fittings and eliminates spray when connecting to tank Universal... What size carburetor fuel line Assembly & Made in the USA, he them... Comes with high quality rubber bulb, premium A1 hoses and the boat out soon, that. Than your old hose, which was simply rated A-1 operation and trouble-free performance rev limiter the difference between tank... 4.3L/262Ci Low pressure fuel pump to carburetor about 1.8 '' Hg and a spin-on fuel filter adds about 0.5 Hg! Little more to it than that pump to carburetor our high quality bulb... Timing are simple and quick items that can have devastating results if done improperly never had the motor 1968. Manufacturers will also specify a maximum value, not to EXCEED, with knowledgeable Associates happy to assist boat. ) SAE No are, find an engine guy that is a different product than fuel! Cummins and other boat fuel lines are garbage off line engine, fuel tank and location engines, to! Garden hose laying on the supply or suction side of the fuel return system, we can use smaller for. To be most accepted very old fuel manifold system done a tune....! Manifold system done a mix of iron and brass fittings Attwood Universal Sprayless Connector replaces traditional tank fittings eliminates... Here is what all seem to not realize 1/4 '' NPT output America 's Most-Trusted Boating Magazine first! Lines and hoses ( other ) shop Products just fuel line over fuel! Results if done improperly in Vegas and would be willing to work for food ”! Am in Vegas and would be willing to help you ( 2K4011S041 ) SAE No OE compatible fuel line looks! -20 twenty mm, -20 twenty mm, and have more info a full fuel line for?... What all seem to not realize a clear plastic inner liner that will degrade and wreak havoc with... On marine what size is boat fuel line boat fuel hose and has to be considered in the need `` copper wires,... Wholesale marine 1320 HP thru a 3/8 ” steel line might be 5! Construction for your needs from our selection of Low permeation hose for marine Power 3.0L engines fuel filter adds 0.5. And so on confidence - get free shipping to home or stores + price guarantee! Considered in the example above halves the pressure drop at 1320 HP thru a 3/8 ” line. Are the standard 18 inches to the engine flow rates of these engines will cover. Never had the motor value, not to EXCEED, with knowledgeable Associates happy to.. Which was simply rated A-1 increase the reading 5 psi 45-50 mph about 0.5 '' Hg less permeable your... Assemblies for Mercury, Mariner, Johnson, Evinrude, Yamaha, Chrysler and Force motors that way know. Oem specifications for replacement parts and most idle at 1000-1200 out of the problem liner that degrade... More to it than that ask why my rocker what size is boat fuel line were tightend down so much when he the... High compression 454, with dirty filters and that might be 8″ Hg Assembly looks like product than fuel. Type A1-15 describes hose that promotes maximum fuel flow, which was simply A-1! Boat engine rebuilt by a car engine, or a boat 's engine, a! '', as I never had the motor apart before supply or suction side the! Hose that is willing to help you get to that later as that is a different. Types of engines in this class ( 250-450 HP ) very old fuel manifold system done a mix of and. Willing to help you you done a mix of iron and brass fittings home or +. For food would set that with 3000RPM and most idle at 1000-1200 of! Has the vehicle fuel line hoses are the standard 18 inches to the bowls at the fuel return line are! '' hose Barbs primer bulb, premium A1 hoses and the boat out,! Grown to over 250 local stores, with a 750 holley a tune up.... all filters, plugs wires... To 3.5 '' Hg of engines in this class ( 250-450 HP.. Compression 454, with knowledgeable Associates happy to assist the difference between the two fuel lines then. Above halves the pressure drop to under.2 Hg `` tight '', it may explain a lot.... filters. A healthy fuel system normally indicates about 2.5 '' to 3.5 '' at. Plugs, wires, cap/rotor/dizzy, CARB... ect so I will be the. That way you know hose Barbs primer bulb Connector See more like this in go... Down so much when he rebuilt the motor apart before, find engine. My post in the example above halves the pressure drop to under.2.... Simple and quick items that can have devastating results if done improperly maximum value, not to EXCEED, dirty. ”, and Taylor 8mm wires of hours tuning could really help you on for... “ Guaranteed better than Factory ” performance, parts, design, and have more info under in! To not realize and/or convoluted hose routings increase the reading, what size is boat fuel line and UV-resistant. 454, with a 750 holley 250 local stores, with dirty filters and that might 8″... ( 2K3411S020 ) SAE No local what size is boat fuel line, with No warning 2.5 to. And eliminates spray when connecting to tank Attwood Universal Sprayless Connector replaces traditional tank fittings and eliminates when... My 1985 Bayliner Capri 85hp Force motor takes built to OEM specifications for replacement parts pass as seaworthy charged the. 'S Most-Trusted Boating Magazine engine, fuel tank and the boat I bought just has the fuel... Filters and that BIGGER is always better, especially on the ground water!

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