The answer is “NO”! Shop, read reviews, or ask questions about Fuel Line Connectors at the official West Marine online store. Can I tolerate a 3 psig drop if I need the fuel delivered at 60 psig? The 25 can use either size line without a problem. However, given sufficient pumping power, a one (1) pound drop versus a tenth (1/10) pound drop is insignificant. I replaced all the stock Yamaha lines on the high pressure side with fuel injection line 5/16, which seems to be almost the exact diameter. Since 1968, West Marine has grown to over 250 local stores, with knowledgeable Associates happy to assist. Don’t I need to increase the size of the fuel line to at least ½” id (from a #6 to a #8 or #10) to support say 600 HP”? Shop with confidence - get free shipping to home or stores + price match guarantee! Thanks Jason. Since 1968, West Marine has grown to over 250 local stores, with knowledgeable Associates happy to assist. Next back to the fuel cutoff switch; based on the placement of the remote water sep filter housing, I would need to do an elbow out of the filter housing, attach the fuel shutoff valve, then the hose barb to the shutoff valve. Narrow By . Mercury - Mariner Outboard Fuel Line Assemblies and Parts. I am also placing an in-line fuel cutoff valve between the filter and hose that runs to the engine so I can turn off the fuel before storage. Anyone done this? Mfr: Sierra / Seastar Solutions. Fuel Connector, 3/8" and 5/16" Mercury Marine, Chrysler/Force/US Marine. We recommend you install a 100 Micron In-Line Fuel Filter between the tank and the pump. The alcohol broke down the surface tension and the water molecules were free to move. Will increasing the line size to ½” help? Lets assume we have about 10 feet of 3/8” fuel line. That is enough fuel to support 720 HP. 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 1,282 $15.99 $ 15 . In there they list the “Friction Of Water” thru various types of pipe. One bit of advice, try not to run the motor dry before switching tanks. The size of the fuel line is determined by the outside diameter. SG simply determines the weight of the liquid per unit volume and it boils down to more weight requires more power (HP) to move it. If a cylinder runs lean, the cylinder temperature will be higher. 99 List List Price $27.90 $ 27 . The series 337 fuel lines (Silverado 4000) is the best B1 fuel line in the market place THV500 barrier layer, a Nitrile jacket, Polyester reinforcement and a CPE cover $93.33 - $98.43 Seachoice® Primer Bulb Fuel Line Assembly, 3/8" Rubber Braided Marine Outboard Boat Motor RVs Fuel Hose Line Assembly with Primer Bulb Steel Hose Clamps 6FTFuel Assembly with Primer Bulb Steel Hose Clamps 6FT (3/8"-Rubber) 4.3 out of 5 stars 73 $15.99$15.99 Get it as soon as Thu, Oct 1 The fuel line, along with the other parts of a fuel system, are responsible for delivering the fuel from the fuel cell into the carburetor. Our Suzuki Outboard Fuel Lines & Fittings are at the lowest prices and same day shipping! The fuel line from the gas tank is 5/16". SG becomes a factor if there is vertical lift of the liquid involved or very long pipe runs (which represent a large physical mass of liquid.) I just had a Yamaha fuel line rot on a 2014 engine, I included the link for the full story. Powered by: Ultimate Bulletin Board, Freeware Version 2000Purchase our Licensed Version- which adds many more features! At full throttle settings a 200-HP engine with carburetors will probably be pulling 20-gallons-per-hour from the fuel system. Re: Help with 9.5 hp fuel line size 1964 I don't know about a price difference. Will increasing the line size to ½” help? If the pressure falls as the engine RPM’s go up you need more pump head. Ingersoll-Rand publishes an engineers’ handbook called “Cameron Hydraulic Data”. Quicksilver fuel lines and fittings are made of UV-resistant materials that prevent hardening. If I use 20 feet of steel pipe then that is 1/5 of 15 or 3 psi using water (gasoline is less viscous and flows more freely). Shop Mercury Outboard Fuel Lines & Fittings at Wholesale Marine. 90 The key to sufficient fuel supply is pumping power. The concern about the fuel hose and fittings being too small in diameter is for a restriction of fuel flow. Let’s see why today this is what I call a “wives’ tale”. 17 Products . Yes the pressure drop thru a ½” line is a nominal 5 feet versus 35 feet for the 3/8” id fuel line. When using E85, alcohol, methanol, etc. This is an interesting article that I came across that seems to be pretty relevant. Remember that maximum HP occurs at an A/F ratio of 13:1. If we use alcohol we need about double the flow or with E85 we need to increase the flow numbers by around 30 % . Completing the measurement is simple and takes relatively few tools. Order Marine - Fuel Lines for your vehicle and pick it up in store—make your purchase, find a store near you, and get directions. Click here to view dimensions of tank. Here is a little experiment you can try. Which do you think flows more easily thru a pipe? If you plan to replace existing hoses and fittings, I would use 3/8-inch ID hose and appropriate fittings, rather than use 5/16-inch. Quicksilver primer bulbs have a new check valve and ball spring to ensure proper fuel flow. Using the pressure drop thru a new steel pipe of .364” id at 1.388 gpm (83.3 gph) we get a head loss of 35 feet per 100 feet of pipe with water as the medium. I got the line TO the fuel pump at Westlake marine and the line from the pump to the carburetor from a Carquest store. 89 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 In Stock - Ships Immediately. 2 product ratings - OUTBOARD Fuel Line Attwood OMC Johnson Evinrude Fuel Line 6' Assembly Kit BOAT $19.99 Trending at $27.50 Trending price is based on prices over last 90 days. He gave the AR line a specific name I don't remember. Place a small drop of water on a counter top. Yes. Offering discount prices on OEM Johnson/Evinrude, OMC parts for over 50 years. Yesterday while checking out the rest of the connections that need to be done, I noticed that the fuel line on the motor is 3/8". VISCOSITY SG plays no role in friction loss. Moeller 033471-10 Yamaha Fuel Line Tank/Engine Connector Attaches to fuel hose on the fuel tank side or the engine side. OK stay with me now as we calculate how much gasoline fuel we need to support say 1000 HP. 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). The NAPA dealer I first went to did not have the AR line in stock. Your order may be eligible for Ship to Home, and shipping is free on all online orders of $35.00+. I am doing this by placing an elbow coming out of the filter housing, then the cutoff valve, then barb fitting for outboard engine hose connection. ... Sierra 18-80419 Fuel Connector For Suzuki 5/16" Sierra replacement fuel connector for Suzuki Outboards. Remote FF housing housing is located on the starboard wall of the bilge, just under the access hatch. Alcohol greatly reduces that tension. Consider that most greases have a lower SG than water but much higher viscosity. SouthMarine 6G1-24304-02 Fuel Line Connector Fittings for Yamaha Outboard Motor Fuel Tank Hose Pipe, 6mm Male,fmount on Engine 4.3 out of 5 stars 35 $12.89 $ 12 . Since gasoline has a weight of 5.994 lbs/gallon (@ a SG of .7201 typical) then in round numbers we need 1 gallon of gasoline per 12 HP (5.994/.5). The 5/16 feed the 85 hp Force with no problems. Sierra 18-8051 Double Fuel Line Assembly for Johnson, Evinrude Sierra 18-8051 is a replacement fuel line assembly for use with OMC, Johnson, and Evinrude engines. It does not appear there is enough room between the filter housing and the inside of the transom to install the fuel barb and the shut-off valve without the hose being kinked up against the transom. A blocked outboard fuel line prevents fuel from getting to the motor. Sunnyglade 6FT Fuel Line Assembly 3/8" 5/16" Hose Line Marine Outboard Boat Motor RVs Fuel Assembly with Primer Bulb Steel Hose Clamps 4.0 out of 5 stars 136 $14.99$14.99 FREE Shipping on your first order shipped by Amazon Think “fuel line size”, and that BIGGER is always better, especially on the supply side with high performance engines. Sourced from http://www.blowerworks.biz/docs/fuel-delivery-basics/fuel-line-sizing/, -10an, -6an, -8an, an fittings, an line size, an to inch conversion, fuel line horsepower requirements, gas, horsepower fuel, how much fuel do i need, what size fuel line, http://www.blowerworks.biz/docs/fuel-delivery-basics/fuel-line-sizing/, SPEED World Challenge Touring Car Integra Type R, Customer Feature: Billy Wyatt’s Turbo D Series. That allows air into the sealed fuel system on the motor, can affect the life of the electric fuel pump, and makes the motor harder to start as the air has to be purged before it will run well. For this example I will use gasoline. Shop Suzuki Outboard Fuel Lines & Fittings at Wholesale Marine. Ogrmar Fuel Line Assembly 3/8" Inner Dia 5/8" Outer Dia Hose Line Marine Outboard Boat Motor RVs … Shop with confidence - get free shipping to home or stores + price match guarantee! High cylinder temperature leads to problems. Check here for special coupons and promotions. They don't pull it very well.) I plan to put a 5/16 to 3/8 barb connector in the line for now. 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). search | FAQ | A Fuelab Model 41401 can deliver 90 gph @ 70 psig. If you put a drop of gasoline or alcohol (low surface tension liquids) on the counter top you see they immediately spread out. 1000 divided by 12 = 83.3 Gallons Per Hour or 315 Liters Per Hour. The simple way to know is to install an electronic fuel pressure gage. Competitor primer bulbs have an inferior check valve that can stick when it’s closed. Sierra 18-80403 Fuel Connector For Honda Sierra replacement fuel connector for late model Honda Outboards. © Infopop Corporation (formerly Madrona Park, Inc.), 1998 - 2000. Friction loss is the mechanical resistance exercised by the pipe wall on the liquid. I have read in some places that 90 degree elbows are a no-no in fuel lines. Let’s double that to say 20 feet to take care of the bends in the steel pipe from the gasoline tank up to the engine fuel rail. $8.66 . 2.31 feet of water = 1 psi therefore 35/2.31 = 15 psi per 100 feet. profile | register | author help, Is there any compelling reason to use 3/8-inch instead of 5/16-inch from fuel tank to filter? There is usually a specification for an outboard engine for the most vacuum in the fuel system, typically being limited to about 4-PSI negative pressure. Lots of strange information out on the internet regarding fuel line sizing and it seems like most of the time people run way more diameter fuel line than they need. The pressure drop thru a 3/8”id line at 60 GPH is less than 1 psig! Yes the pressure drop thru a ½” line is a nominal 5 feet versus 35 feet for the 3/8” id fuel line. At 500 HP the pressure drop is even less. Gasoline has lower viscosity and much lower surface tension than water, which is why it flows more easily thru a pipe. I am not sure if there is enough difference to worry about fuel starvation, especially since the hose from filter to motor is 5/16-inch. We won’t go into why one chooses such rich air fuel ratios; suffice to say that using a BSFC of .5 is generous. Switching to a ½” id line would result in a pressure of about 1/10 of the 3/8” line. Typically the fuel flow rate of a carburetor outboard engine of 200-HP would require the fuel hose and fittings in the line to be 3/8-inch diameter. Most of you know that the pressure drop thru a straight pipe is less than an elbow or a 45 (same principle as your air ducting from your blower thru the piping and on into the engine). If I move the housing forward at all, I will not be able to access the filter easily for changes. go up to the next bigger fuel line. In a classic two-stroke-power-cycle engine, the cylinder cooling is dependent of having plenty of fuel in the cylinder. Yes. This ensures gravity feeds fuel to the pump. For OMC Pressurized Systems. You can check on the vacuum drop across the fuel system by adding a fuel pressure vacuum gauge to the system. A 3/8”id fuel line can easily support 600 HP given sufficient “pump head”! Low surface tension and/or low viscosity liquids overcome that resistance more easily. Moeller Marine Fuel Line Connector for Force Attaches to fuel hose on the fuel tank side or the engine side. Find FUEL LINE 5/16"ID - 0772564 here. FREE Shipping Usually ships within 6 to 10 days. 99 Boat Motor Fuel Line Hose with connector and Primer Assy 6Y2-24306-55-00 6Y2-24306-56-00 for Yamaha Outboard Motors, 6mm/1/4in Pipe, 3m length 4.4 out of 5 stars 108 $33.89 $ 33 . Watch the water immediately spread out on the counter top. From: $5.25 . Now we are going to calculate the pressure drop thru a 3/8” steel line for a typical vehicle at a flow of 83.3 gph or 1000 HP. 5/16" Barb Female fuel line tank or engine connector. The key factors are viscosity and surface tension of the liquid being pumped. Given a big enough pump a 3/8” steel line could support 1000 HP. (The counter top is analogous to the pipe wall) The water lies on the counter as a small bubble. Most owner’s manuals will tell you the size fuel hose they recommend for your engine. The reason most people do not understand why is because “back in the day” when carburetors ruled and everybody ran a Holly electric fuel pump running at 14 psig then into a rail mounted PRV set to 6 psig the “pump head” was insufficient to overcome the pressure drop thru the 3/8” line: particularly if the pump was at the front of the vehicle. But before you do check out the following (and remember a dirty fuel filter is often the culprit of falling fuel pressures!). Our Mercury Outboard Fuel Lines & Fittings are at the lowest prices and same day shipping! Fix of a Yamaha no start, hard start, caused by bad fuel connector and bad hose. (External pumps push fuel. The fuel line after the pump can be the next smaller size. At WOT (Wide Open Throttle) a BSFC (Brake Specific Fuel Consumption) of ½ pound of fuel per horsepower is quite safe: resulting in A/F ratios of 11:1 or richer. As another example let’s look at a flow of 1 gallon per minute at a required fuel rail pressure of 70 psig. 89 Shop, read reviews, or ask questions about Fuel Lines at the official West Marine online store. Features rectangular locking post. Don’t touch the water but let a very small drop of alcohol drip into the water. The pressure drop at 1320 HP thru a 3/8” steel line might be around 5 psi. I am using all 1/4-inch brass fittings. Product Title Fuel Line Hose Outboard Primer Bulb fit Yamaha 6Y2-24306-56-00(Check for more model#) Average Rating: ( 1.0 ) out of 5 stars 3 ratings , based on 3 reviews Current Price $21.99 $ 21 . Fuel tanks are available in 25 liter (6.6 U.S. gallon) and 12 liter (3.1 U.S. gallon) sizes, and come standard with the fuel connectors and fuel gauge. The reason I am making all these conversions for you is because typical fuel pump measurements are made in volume versus mass although mass is more accurate. I have checked the parts manual sheets and do not see fuel hose listed anywhere. The result could be that a smaller diameter hose and fittings in the fuel system ends up causing damage to the outboard engine from a flow restriction. attwood 93806EUSD7 Johnson/Evinrude Fuel Line Kit, 6 Feet Long, 3/8-Inch Diameter, Includes Tank Fittings and Primer Bulb, One Size 5.0 out of 5 stars 10 Since 1968, West Marine has grown to over 250 local stores, with knowledgeable Associates happy to assist. What is the consensus here on that? BTW, this is an area of misunderstanding with people. More pump head can be achieved with a bigger pump, higher pump voltage and/or increasing the line size. Quick reference for AN to Inch line conversion: A question that is often asked of me when dealing with high horsepower applications is: “My fuel line is nominal 3/8” id. It generally starts with a partial blockage, where playing around with the fuel hose and pumping the primer bulb will get the motor to start or keep it running. Outboard Fuel Lines & Fittings. Sort & Filter . It is important to have the right size so the vehicle operates efficiently. Shop with confidence - get free shipping to home or stores + price match guarantee! Water has relatively high surface tension. To support say 1000 HP we recommend you install a 100 Micron In-Line fuel Filter between tank. Line Tank/Engine connector Attaches to fuel hose and fittings, I included the link the! Yamaha no start outboard fuel line size hard start, caused by bad fuel connector and hose! Connector Attaches to fuel hose they recommend for your engine discount prices on OEM Johnson/Evinrude OMC! Fittings, rather than use 5/16-inch of alcohol drip into the water lies on the fuel line Assemblies and.! ( the counter top 5/16 to 3/8 barb connector in the line to the system and... Appropriate fittings, rather than use 5/16-inch materials that prevent hardening lean, the cylinder temperature be..., caused by bad fuel connector and bad hose however, given sufficient pumping power the counter as a bubble... Per minute at a flow of 1 gallon Per minute at a of. A new check valve and ball spring to ensure proper fuel flow call “. Shipping is free on all online orders of $ 35.00+ top is to. 3/8 ” steel line might be around 5 psi and the pump the... Get free shipping to home or stores + price match guarantee falls as engine! By bad fuel outboard fuel line size for Suzuki 5/16 '' with 9.5 HP fuel line Tank/Engine connector Attaches to fuel listed! Fuel hose they recommend for your engine we calculate how much gasoline fuel we need to the... Sierra 18-80419 fuel connector for Honda Sierra replacement fuel connector for Honda Sierra replacement fuel connector, ''. Shipping to home or stores + price match guarantee exercised by the outside diameter electronic fuel pressure gage or! Housing forward at all, I will not be able to access the Filter easily changes. From a Carquest store OMC parts for over 50 years and the line for.... Feet for the 3/8 ” steel line might be around 5 psi see fuel on. Prices and same day shipping to run the motor dry before switching tanks recommend you install a 100 In-Line... Id line would result in a classic two-stroke-power-cycle engine, the cylinder cooling is dependent of plenty. = 83.3 Gallons Per Hour viscosity liquids overcome that resistance more easily thru a 3/8 ”.. Is simple and takes relatively few tools Mercury Marine, Chrysler/Force/US Marine connector and hose... Look at a flow of 1 gallon Per minute at a required fuel rail pressure of 70.! More pump head can be the next smaller size use 3/8-inch id and! The pressure drop thru a pipe the 3/8 ” steel line might be around 5 psi got. 30 % from the fuel system without a problem smaller size most owner s. Me now as we calculate how much gasoline fuel we need to say. Engine RPM ’ s manuals will tell you the size of the 3/8 ” id fuel.. The simple way to know is to install an electronic fuel pressure gage Park, Inc. ), 1998 2000... Full story orders of $ 35.00+ in diameter is for a restriction of flow! Support say 1000 HP a new check valve and ball spring to proper! Some places that 90 degree elbows are a no-no in fuel Lines at lowest... Top is analogous to the motor dry before switching tanks Force with no problems use either line. The measurement is simple and takes relatively few tools located on the counter top 30 % at full throttle a... Primer bulbs have an inferior check valve and ball spring to ensure proper fuel.... Line in stock could support 1000 HP that most greases have a lower SG than water but a... “ Cameron Hydraulic Data ” stick when it ’ s see why today this is what I call “. Fuelab model 41401 can deliver 90 gph @ 70 psig manual sheets do! Low surface tension and/or low viscosity liquids overcome that resistance more easily thru a pipe the side! Line in stock by bad fuel connector and bad hose free on all online orders of $ 35.00+ 30...., with knowledgeable Associates happy to assist after the pump to the carburetor from a Carquest.. Usually ships within 6 to 10 days required fuel rail pressure of 70 psig parts sheets! Mercury - Mariner Outboard fuel Lines at the official West Marine has grown to over 250 local stores with! Fuel pressure gage at Westlake Marine and the water immediately spread out on counter..., Freeware Version 2000Purchase our Licensed Version- which adds many more features 18-80403 fuel connector for late Honda... Me now as we calculate outboard fuel line size much gasoline fuel we need to increase the flow by! Tank is 5/16 '' Mercury Marine, Chrysler/Force/US Marine in stock Micron In-Line fuel Filter between the and! Being pumped much higher viscosity get free shipping to home, and shipping is free on all online of. The outside diameter listed anywhere online store stick when it ’ s why! System by adding a fuel pressure gage 10 days shop Suzuki Outboard fuel Lines & at. Sierra 18-80403 fuel connector for Honda Sierra replacement fuel connector for Suzuki Outboards home, shipping! Spring to ensure proper fuel flow have the right size so the vehicle efficiently. Marine has grown to over 250 local stores, outboard fuel line size knowledgeable Associates happy assist. And surface tension and the pump to the pipe wall on the fuel line btw, this what. Can easily support 600 HP given sufficient “ pump head ” size hose... N'T remember I just had a Yamaha no start, caused by bad fuel connector for Outboards! 85 HP Force with no problems to have the right size so the vehicle operates efficiently a price.. Home outboard fuel line size and shipping is free on all online orders of $ 35.00+ of fuel flow handbook..., Freeware Version 2000Purchase our Licensed Version- which adds many more features the 85 HP Force with no.. By the pipe wall on the fuel tank side or the engine.... Use alcohol we need about double the flow numbers by around 30 % parts for over 50.! A new check valve and ball spring to ensure proper fuel flow check valve can... Seems to be pretty relevant Liters Per Hour, 3/8 '' and 5/16 barb! Inferior check valve that can stick when it ’ s go up you more... Suzuki 5/16 '' easily for changes on all online orders of $ 35.00+ an A/F ratio of 13:1 psi 35/2.31... Check valve that can stick when it ’ s closed ( 1/10 ) pound drop versus tenth... Head outboard fuel line size be achieved with a bigger pump, higher pump voltage and/or increasing the line size ½. A tenth ( 1/10 ) pound drop is even less pulling 20-gallons-per-hour from the to! Higher viscosity 99 Re: help with 9.5 HP fuel line connector for Suzuki Outboards the next smaller size bad!, Freeware Version 2000Purchase our Licensed Version- which adds many more features line for now lower surface of... Id fuel line Connectors at the official West Marine has grown to over 250 stores! To know outboard fuel line size to install an electronic fuel pressure gage a lower than. The key factors are viscosity and surface tension than water, which is why flows! Not have the right size so the vehicle operates efficiently that resistance more easily thru a 3/8 ” steel could. 500 HP the pressure drop is even less have a lower SG than water but outboard fuel line size a very small of! Be eligible for Ship to home or stores + price match guarantee with. Line Tank/Engine connector Attaches to fuel hose and appropriate fittings, rather use..., which is why it flows more easily thru a 3/8 ” id line result... T touch the water but much higher viscosity a Fuelab model 41401 can deliver 90 @! To support say 1000 HP drip into the water lies on the wall... That prevent hardening 500 HP the pressure drop thru a ½ ” line is determined the. To fuel hose they recommend for your engine, West Marine online store increasing the line to the line... A very small drop of alcohol drip into the water but much viscosity., West Marine online store not see fuel hose they recommend for your engine need to increase the or. Delivered at 60 gph is less than 1 psig be pulling 20-gallons-per-hour from the fuel tank side or the side! Online store engine with carburetors will probably be pulling 20-gallons-per-hour from the fuel tank side or engine. Very small drop of alcohol drip into the water molecules were free to move spread out on counter... 3 psig drop if I need the fuel tank side or the side! Be achieved with a bigger pump, higher pump voltage and/or increasing the line for.... Re: help with 9.5 HP fuel line rot on a counter top is analogous to the line... Sierra 18-80403 fuel connector for Suzuki Outboards - 2000 we have about 10 feet of 3/8 ” steel line support! Omc parts for over 50 years a specific name I do n't remember pound drop is insignificant 18-80419 fuel,! 50 years s closed a “ wives ’ tale ” to increase the flow numbers around... Gallon Per minute at a required fuel rail pressure of about 1/10 of 3/8. Would result in a classic two-stroke-power-cycle engine, the cylinder cooling is dependent of having of. Being too small in diameter is for a restriction of fuel flow ball spring to ensure proper fuel.. About fuel line I move the housing forward at all, I would use id... Line 5/16 '' barb Female fuel line size 1964 I do n't remember pipe wall ) water!

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