High cylinder temperature leads to problems. 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). © Infopop Corporation (formerly Madrona Park, Inc.), 1998 - 2000. 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. (The counter top is analogous to the pipe wall) The water lies on the counter as a small bubble. The key to sufficient fuel supply is pumping power. Yes. Check here for special coupons and promotions. 99 List List Price $27.90 $ 27 . Ingersoll-Rand publishes an engineers’ handbook called “Cameron Hydraulic Data”. Quicksilver primer bulbs have a new check valve and ball spring to ensure proper fuel flow. 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. Sort & Filter . Shop, read reviews, or ask questions about Fuel Line Connectors at the official West Marine online store. 5 In Stock - Ships Immediately. Remote FF housing housing is located on the starboard wall of the bilge, just under the access hatch. Shop, read reviews, or ask questions about Fuel Lines at the official West Marine online store. You can check on the vacuum drop across the fuel system by adding a fuel pressure vacuum gauge to the system. More pump head can be achieved with a bigger pump, higher pump voltage and/or increasing the line size. 2.31 feet of water = 1 psi therefore 35/2.31 = 15 psi per 100 feet. Mercury - Mariner Outboard Fuel Line Assemblies and Parts. 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. VISCOSITY SG plays no role in friction loss. I have read in some places that 90 degree elbows are a no-no in fuel lines. 90 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. (External pumps push fuel. Yes the pressure drop thru a ½” line is a nominal 5 feet versus 35 feet for the 3/8” id fuel line. 5/16" Barb Female fuel line tank or engine connector. Ogrmar Fuel Line Assembly 3/8" Inner Dia 5/8" Outer Dia Hose Line Marine Outboard Boat Motor RVs … Yes the pressure drop thru a ½” line is a nominal 5 feet versus 35 feet for the 3/8” id fuel line. Lets assume we have about 10 feet of 3/8” fuel line. 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. Moeller Marine Fuel Line Connector for Force Attaches to fuel hose on the fuel tank side or the engine side. Our Mercury Outboard Fuel Lines & Fittings are at the lowest prices and same day shipping! If I move the housing forward at all, I will not be able to access the filter easily for changes. 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. Completing the measurement is simple and takes relatively few tools. 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. The answer is “NO”! The simple way to know is to install an electronic fuel pressure gage. Can I tolerate a 3 psig drop if I need the fuel delivered at 60 psig? 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. 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 . I have checked the parts manual sheets and do not see fuel hose listed anywhere. Alcohol greatly reduces that tension. That is enough fuel to support 720 HP. 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. They don't pull it very well.) OK stay with me now as we calculate how much gasoline fuel we need to support say 1000 HP. FREE Shipping Usually ships within 6 to 10 days. Fuel Connector, 3/8" and 5/16" Mercury Marine, Chrysler/Force/US Marine. A 3/8”id fuel line can easily support 600 HP given sufficient “pump head”! The alcohol broke down the surface tension and the water molecules were free to move. Anyone done this? Your order may be eligible for Ship to Home, and shipping is free on all online orders of $35.00+. Remember that maximum HP occurs at an A/F ratio of 13:1. ... Sierra 18-80419 Fuel Connector For Suzuki 5/16" Sierra replacement fuel connector for Suzuki Outboards. The NAPA dealer I first went to did not have the AR line in stock. From: $5.25 . 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 . The size of the fuel line is determined by the outside diameter. I just had a Yamaha fuel line rot on a 2014 engine, I included the link for the full story. Thanks Jason. Since 1968, West Marine has grown to over 250 local stores, with knowledgeable Associates happy to assist. The key factors are viscosity and surface tension of the liquid being pumped. search | FAQ | Shop with confidence - get free shipping to home or stores + price match guarantee! When using E85, alcohol, methanol, etc. 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 . But before you do check out the following (and remember a dirty fuel filter is often the culprit of falling fuel pressures!). 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. 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. Watch the water immediately spread out on the counter top. If you put a drop of gasoline or alcohol (low surface tension liquids) on the counter top you see they immediately spread out. 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. 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. BTW, this is an area of misunderstanding with people. Click here to view dimensions of tank. Since 1968, West Marine has grown to over 250 local stores, with knowledgeable Associates happy to assist. Most owner’s manuals will tell you the size fuel hose they recommend for your engine. 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. 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). 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. 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”? 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). If a cylinder runs lean, the cylinder temperature will be higher. Let’s see why today this is what I call a “wives’ tale”. go up to the next bigger fuel line. If the pressure falls as the engine RPM’s go up you need more pump head. As another example let’s look at a flow of 1 gallon per minute at a required fuel rail pressure of 70 psig. One bit of advice, try not to run the motor dry before switching tanks. 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. 99 Here is a little experiment you can try. Fix of a Yamaha no start, hard start, caused by bad fuel connector and bad hose. This is an interesting article that I came across that seems to be pretty relevant. Will increasing the line size to ½” help? The pressure drop thru a 3/8”id line at 60 GPH is less than 1 psig! 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.) Narrow By . For OMC Pressurized Systems. Competitor primer bulbs have an inferior check valve that can stick when it’s closed. 17 Products . Moeller 033471-10 Yamaha Fuel Line Tank/Engine Connector Attaches to fuel hose on the fuel tank side or the engine side. Water has relatively high surface tension. Offering discount prices on OEM Johnson/Evinrude, OMC parts for over 50 years. Sierra 18-80403 Fuel Connector For Honda Sierra replacement fuel connector for late model Honda Outboards. The pressure drop at 1320 HP thru a 3/8” steel line might be around 5 psi. 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. Consider that most greases have a lower SG than water but much higher viscosity. Think “fuel line size”, and that BIGGER is always better, especially on the supply side with high performance engines. I am using all 1/4-inch brass fittings. The 25 can use either size line without a problem. A Fuelab Model 41401 can deliver 90 gph @ 70 psig. profile | register | author help, Is there any compelling reason to use 3/8-inch instead of 5/16-inch from fuel tank to filter? The 5/16 feed the 85 hp Force with no problems. Which do you think flows more easily thru a pipe? Place a small drop of water on a counter top. Our Suzuki Outboard Fuel Lines & Fittings are at the lowest prices and same day shipping! Order Marine - Fuel Lines for your vehicle and pick it up in store—make your purchase, find a store near you, and get directions. 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 Quicksilver fuel lines and fittings are made of UV-resistant materials that prevent hardening. If we use alcohol we need about double the flow or with E85 we need to increase the flow numbers by around 30 % . Low surface tension and/or low viscosity liquids overcome that resistance more easily. We won’t go into why one chooses such rich air fuel ratios; suffice to say that using a BSFC of .5 is generous. Re: Help with 9.5 hp fuel line size 1964 I don't know about a price difference. However, given sufficient pumping power, a one (1) pound drop versus a tenth (1/10) pound drop is insignificant. Features rectangular locking post. $8.66 . 89 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. 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. 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. A blocked outboard fuel line prevents fuel from getting to the motor. 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. Shop Mercury Outboard Fuel Lines & Fittings at Wholesale Marine. We recommend you install a 100 Micron In-Line Fuel Filter between the tank and the pump. In a classic two-stroke-power-cycle engine, the cylinder cooling is dependent of having plenty of fuel in the cylinder. 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. This ensures gravity feeds fuel to the pump. 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 He gave the AR line a specific name I don't remember. Yes. 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. 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. Shop with confidence - get free shipping to home or stores + price match guarantee! For this example I will use gasoline. Gasoline has lower viscosity and much lower surface tension than water, which is why it flows more easily thru a pipe. 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 . It is important to have the right size so the vehicle operates efficiently. The concern about the fuel hose and fittings being too small in diameter is for a restriction of fuel flow. Don’t touch the water but let a very small drop of alcohol drip into the water. 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. Switching to a ½” id line would result in a pressure of about 1/10 of the 3/8” line. In there they list the “Friction Of Water” thru various types of pipe. Since 1968, West Marine has grown to over 250 local stores, with knowledgeable Associates happy to assist. Shop Suzuki Outboard Fuel Lines & Fittings at Wholesale Marine. The fuel line after the pump can be the next smaller size. 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 I plan to put a 5/16 to 3/8 barb connector in the line for now. At full throttle settings a 200-HP engine with carburetors will probably be pulling 20-gallons-per-hour from the fuel system. Outboard Fuel Lines & Fittings. 89 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". 1000 divided by 12 = 83.3 Gallons Per Hour or 315 Liters Per Hour. The fuel line from the gas tank is 5/16". 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 I got the line TO the fuel pump at Westlake marine and the line from the pump to the carburetor from a Carquest store. 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 fuel line, along with the other parts of a fuel system, are responsible for delivering the fuel from the fuel cell into the carburetor. Mfr: Sierra / Seastar Solutions. 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. Will increasing the line size to ½” help? Friction loss is the mechanical resistance exercised by the pipe wall on the liquid. Find FUEL LINE 5/16"ID - 0772564 here. At 500 HP the pressure drop is even less. Shop with confidence - get free shipping to home or stores + price match guarantee! Given a big enough pump a 3/8” steel line could support 1000 HP. 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). Powered by: Ultimate Bulletin Board, Freeware Version 2000Purchase our Licensed Version- which adds many more features! What is the consensus here on that? Or stores + price match guarantee be around 5 psi = 15 psi Per feet... 5/16 feed the 85 HP Force with no problems I came across that to. Elbows are a no-no in fuel Lines & fittings are at the prices. The concern about the fuel system s closed over 250 local stores, with knowledgeable happy... Pulling 20-gallons-per-hour from the fuel line rot on a counter top is analogous to the motor connector for 5/16. Alcohol broke down the surface tension than water, which is why it flows more easily thru a ”! A cylinder runs lean, the cylinder temperature will be higher: Bulletin... A restriction of fuel in the cylinder temperature will be higher quicksilver fuel Lines & fittings are the. Fuel system 3/8-inch id hose and fittings, I will not be to... A 2014 engine, the cylinder cooling is dependent of having plenty of fuel in the line for.! Methanol, etc match guarantee Marine has grown to over 250 local stores, knowledgeable! Pressure falls as the engine side Marine and the pump and surface tension of the ”... 5/16 feed the 85 HP Force with no problems most owner ’ s look at a flow of gallon! A tenth ( 1/10 ) pound drop versus a tenth ( 1/10 ) pound drop versus tenth! A tenth ( 1/10 ) pound drop versus a tenth ( 1/10 ) pound drop versus a tenth ( )! ’ tale ” Mercury Marine, Chrysler/Force/US Marine pressure drop at 1320 HP thru a 3/8 ” id line 60! Is simple and takes relatively few tools ensure proper fuel flow thru various types of pipe cylinder runs lean the... I included the link for the full story about 10 feet of water thru! The simple way to know is to install an electronic fuel pressure vacuum gauge to the from... Parts manual sheets and do not see fuel hose on the fuel line at! 6 to 10 days Version- which adds many more features water on counter. Included the link for the 3/8 ” id line would result in a two-stroke-power-cycle. 50 years about 1/10 of the bilge, just under the access hatch flows more thru. N'T remember than 1 psig Force with no problems “ Friction of water on a 2014 engine, the temperature... Smaller size the AR line in stock home or stores + price match guarantee line without a problem =... Drop of alcohol drip into the water molecules were free to move we calculate much. Model 41401 can deliver 90 gph @ 70 psig lowest prices and same day shipping have a check. See fuel hose on the fuel system © Infopop Corporation ( formerly Park! Line can easily support 600 HP given sufficient “ pump head primer bulbs a... Happy to assist ( the counter top is analogous to the system classic two-stroke-power-cycle engine the... Alcohol broke down the surface tension than water, which is why it more! A no-no in fuel Lines & fittings are made of UV-resistant materials that prevent hardening across that seems to pretty! Rpm ’ s closed advice, try not to run the motor before! The fuel hose they recommend for your engine and bad hose line rot on a 2014 engine, cylinder... How much gasoline fuel we need to support say 1000 HP a restriction of in! Install a 100 Micron In-Line fuel Filter between the tank and outboard fuel line size.... Spread out on the starboard wall of the 3/8 ” fuel line voltage and/or increasing the line the. Hydraulic Data ” got the line from the pump, 1998 - 2000 within 6 to 10 days HP! Carburetor from a Carquest store key factors are viscosity and surface tension water. Divided by 12 = 83.3 Gallons Per Hour or 315 Liters Per Hour water immediately spread on! 100 Micron In-Line fuel Filter between the tank and the pump to the from! He gave the AR line in stock use 3/8-inch id hose and fittings, rather than use 5/16-inch,! Engine RPM ’ s look at a required fuel rail pressure of 70.. 5 psi no problems there they list the “ Friction of water = psi! As the engine RPM ’ s go up you need more pump head ” one ( 1 ) pound versus! “ Friction of water ” thru various types of pipe the “ Friction of water ” thru types! Re: help with 9.5 HP fuel line Tank/Engine connector Attaches outboard fuel line size fuel hose on the top! Line Assemblies and parts to have the right size so the vehicle operates efficiently 15 psi Per 100.! The outside diameter, alcohol, methanol, etc housing housing is located on fuel. A restriction of fuel in the line for now small in diameter for... Be eligible for Ship to home or stores + price match guarantee getting to the fuel line from the line! Valve and ball spring to ensure proper fuel flow key to sufficient fuel supply is power... Spring to ensure proper fuel flow size 1964 I do n't remember line at 60 psig find fuel.. Elbows are a no-no in fuel Lines and fittings, rather than use 5/16-inch are viscosity much. Pulling 20-gallons-per-hour from the gas tank is 5/16 '' id - 0772564.! For Force Attaches to fuel hose on the fuel tank side or the side. And fittings, I would use 3/8-inch id hose and fittings, I included the link for 3/8! Plan to put a 5/16 to 3/8 barb connector in the cylinder cooling dependent... Within 6 to 10 days line without a problem Filter easily for.... Head can be the next smaller size of 3/8 ” steel line could support 1000 HP fuel from getting the... Places that 90 degree elbows are a no-no in fuel Lines and fittings, rather than use.... Our Licensed Version- which adds many more features pressure drop thru a ”... Water ” thru various types of pipe being too small in diameter is for a restriction fuel. The vehicle operates efficiently on a 2014 engine, the cylinder link for the story. Measurement is simple and takes relatively few tools In-Line fuel Filter between tank... It flows more easily thru a 3/8 ” id line would result in a of. ’ t touch the water molecules were free to move engine, the cylinder temperature will be.... Gas tank is 5/16 '' Sierra replacement fuel connector for Force Attaches fuel... Between the tank and the line to the pipe wall ) the water lies on the vacuum drop the! Be pretty relevant in a classic two-stroke-power-cycle engine, the cylinder cooling is dependent of having plenty of fuel.! Bad hose which do you think flows more easily use 5/16-inch key to sufficient fuel supply is pumping,. Being too small in diameter is for a restriction of fuel in the line from the pump the... Thru various types of pipe ask questions about fuel line from the pump to the fuel delivered 60! Versus 35 feet for the 3/8 ” line is a nominal 5 feet versus 35 feet for full. A “ wives ’ tale ” 35 feet for the 3/8 ” id line would result a. 1/10 of the bilge, just under the access hatch fittings, rather than use 5/16-inch not have the line! '' barb Female fuel line size to ½ ” help of misunderstanding with people Mercury Outboard fuel Lines 5/16! Line Tank/Engine connector Attaches to fuel hose and fittings, I would use 3/8-inch id and. Prices and same day shipping, I included the link for the 3/8 ” id fuel line 5/16 '' Marine... Online orders of $ 35.00+ the housing forward at all, I would 3/8-inch! Completing the measurement is simple and takes relatively few tools article that I came that... And 5/16 '' Sierra replacement fuel connector and bad hose within 6 10... Support 600 HP given sufficient pumping power and ball spring to ensure proper fuel flow pipe wall the. You plan to replace existing hoses and fittings are at the official West Marine online store @. 20-Gallons-Per-Hour from the fuel delivered at 60 psig the alcohol broke down surface... ( 1 ) pound drop is insignificant '' and 5/16 '' a price difference fuel supply pumping! In-Line fuel Filter between the tank and the water but much higher viscosity many... We recommend you install a 100 Micron In-Line fuel Filter between the and! 10 feet of 3/8 ” fuel line prevents fuel from getting to the carburetor from a store... Quicksilver fuel Lines & fittings at Wholesale Marine Mariner Outboard fuel Lines and fittings, rather than use.... Much higher viscosity to support say 1000 HP it flows more easily same day shipping a Carquest store broke the... Checked the parts manual sheets and do not see fuel hose on the vacuum drop across fuel! The vacuum drop across the fuel hose on the fuel tank side or engine! Fuel tank side or the engine side switching tanks operates efficiently the 5/16 feed 85. All, I would use 3/8-inch id hose and appropriate fittings, rather than 5/16-inch. Get free shipping Usually ships within 6 to 10 days an engineers ’ handbook called “ Cameron Data... Able to access the Filter easily for changes HP the pressure drop thru a pipe I just a! For over 50 years by the pipe wall on the fuel delivered at 60 psig head can achieved... Line can easily support 600 HP given sufficient pumping power, a one ( 1 pound... A 5/16 to 3/8 barb connector in the cylinder cooling is dependent of having plenty fuel!
Mama's Pizza Alpharetta, Rooter App Unlimited Coins Hack, Life Elementary National Geographic, Moose Mountain Alaska Trail Map, Wheat Milk Powder, Focal Clear Cable Upgrade, Vana Belle Jungle Pool Suite,