If a cylinder runs lean, the cylinder temperature will be higher. Quicksilver primer bulbs have a new check valve and ball spring to ensure proper fuel flow. When using E85, alcohol, methanol, etc. Remember that maximum HP occurs at an A/F ratio of 13:1. Anyone done this? 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). 89 Find FUEL LINE 5/16"ID - 0772564 here. The alcohol broke down the surface tension and the water molecules were free to move. 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). Let’s see why today this is what I call a “wives’ tale”. In a classic two-stroke-power-cycle engine, the cylinder cooling is dependent of having plenty of fuel in the cylinder. 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 fuel line after the pump can be the next smaller 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. Yes the pressure drop thru a ½” line is a nominal 5 feet versus 35 feet for the 3/8” id fuel line. Switching to a ½” id line would result in a pressure of about 1/10 of the 3/8” line. 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. 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). Here is a little experiment you can try. Quicksilver fuel lines and fittings are made of UV-resistant materials that prevent hardening. Our Suzuki Outboard Fuel Lines & Fittings are at the lowest prices and same day shipping! As another example let’s look at a flow of 1 gallon per minute at a required fuel rail pressure of 70 psig. 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). 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. Outboard Fuel Lines & Fittings. Fix of a Yamaha no start, hard start, caused by bad fuel connector and bad hose. Water has relatively high surface tension. Moeller Marine Fuel Line Connector for Force Attaches to fuel hose on the fuel tank side or the engine side. Don’t touch the water but let a very small drop of alcohol drip into the water. 99 List List Price $27.90 $ 27 . Ogrmar Fuel Line Assembly 3/8" Inner Dia 5/8" Outer Dia Hose Line Marine Outboard Boat Motor RVs … Remote FF housing housing is located on the starboard wall of the bilge, just under the access hatch. The simple way to know is to install an electronic fuel pressure gage. If the pressure falls as the engine RPM’s go up you need more pump head. Moeller 033471-10 Yamaha Fuel Line Tank/Engine Connector Attaches to fuel hose on the fuel tank side or the engine side. 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 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 . Consider that most greases have a lower SG than water but much higher viscosity. In there they list the “Friction Of Water” thru various types of pipe. A Fuelab Model 41401 can deliver 90 gph @ 70 psig. Can I tolerate a 3 psig drop if I need the fuel delivered at 60 psig? 89 Watch the water immediately spread out on the counter top. At 500 HP the pressure drop is even less. However, given sufficient pumping power, a one (1) pound drop versus a tenth (1/10) pound drop is insignificant. The key to sufficient fuel supply is pumping power. A blocked outboard fuel line prevents fuel from getting to the motor. A 3/8”id fuel line can easily support 600 HP given sufficient “pump head”! Yes. Sort & Filter . Your order may be eligible for Ship to Home, and shipping is free on all online orders of $35.00+. Shop, read reviews, or ask questions about Fuel Lines at the official West Marine online store. If I move the housing forward at all, I will not be able to access the filter easily for changes. search | FAQ | Low surface tension and/or low viscosity liquids overcome that resistance more easily. 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. 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. $8.66 . Grown to over 250 local stores, with knowledgeable Associates happy to assist, than! 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