Drive Gaskets. Air then refills the bulb through an aperture protected by an air filter. Primer bulbs attach with two screws on the base plate alongside the carburetor and may last for years. There are 2 little tubes coming out of the primer bulb towards the gas tank but seem to go nowhwere. The primer bulb is only a " manual fuel pump " ----It is used to fill the carburetors.----------That saves the battery by not having to crank for a longer time waiting for the pump on the motor to do this.----Or it saves one from getting " popeye arms " on a manual start motor.----- … Once the carburetor is full of fuel, the excess will be purged back into the tank through the return line. ... 6MM HOSE MOUNTED TANK SIDE FUEL PIPE JOINT 6Y1-24305-06-00 Part # 6Y1-24305-06-00 ... FUEL HOSE ASSEMBLY WITH PRIMER BULB 6MM 6YL-24306-64-00 Part #6YL-24306-64-00 Her six children and stepchildren served as subjects of editorials during her tenure as a local newspaper editor. If its fuel line is not primed, eve… In 2011, the marine industry changed forever when the EPA initiated a series of regulations to reduce emissions from marine fuel systems.In addition to anti-spitback, automatic fuel shutoff, and the installation of audible-click tethered fuel caps, requirements specify integrated fuel systems with low permeation fuel tanks and fugitive emission controls. A vacuum can also result from obstruction along the path the fuel travels in the gas filter and fuel lines. If a brittle bulb cracks around the seal, air will leak out the side rather than force fuel from the tank into the bulb, also causing a collapse. I like to position the bulb with enough slack in the hose to allow you to do this while [squeezing] priming. I'd like to know for future reference. The only time a primer bulb will pressurize a tank is if there is a defect and and the bulb is just sucking air and no fuel is being removed from the tank. just to charge the pump lines and carb bowl with fuel. Depending on how often the little machine starts and its age, the inside of the bulb will eventually get gooey, causing it to stick. I did just get some stihl line I'm going to try out next time I redo a saw fuel system. Just a dumb question but are you sure you didnt swap the fuel lines on the back of the primer? I can blow into the fuel line and it will come running back out fine. Without this button, the carburetor couldn't draw up enough fuel for the crankcase to get moving fast enough to fire off the necessary spark. This is an old 3-prong fitting for a Johnson/Evinrude metal tank that included a line for pressure and a separate line for fuel… Engine Gaskets. Pushing on primer bulb PUSHES air OUT of fuel filter and sucks from carb side of bulb. Boats built before 2011 will only be impacted by these changes when it comes time to replace components in their fuel systems, specifically a fuel tank and any of the rubber hoses or primer bulbs in the system. That should let you know if the primer is innocent or guilty. The tank has no cracks, only the tube holes and the tubes appear to seal those to prevent air escape. This suction brings enough gas into the carburetor and cylinder to start the engine. A retired municipal judgem Reynolds holds a degree in communications from Northern Illinois University. You must log in or register to reply here. Seals. Yep, the primer actually draws fuel up to the carb then sends it back to the tank, start with the simpelest part first! Pump the bulb until it is firm to the touch. I have purchased new carburetors with clogged screens before. At least I've never had luck with it. Tank side is for larger line and runs into tank and fuel filter. I assume those are pre carb rebuild pictures? Fuel Transfer Pumps. Top carb nipple with small line runs to tank vent and sticks about 1 inch into tank top. Although air filters are “permanent” sponge-type filters, they should, nonetheless, be periodically replaced. Universal 8mm Fuel Gas Hose Line Set With Rubber Pump Manual Pressure Primer Bulb Fit For Car Boat. Permanent Fuel Tanks FAQ’s. Here's some pictures to show the current situation. 99 The Fuel Demand Valve (FDV) installs on the fuel hose between the fuel tank and primer bulb, and prevents fuel from flowing unless there is demand from the engine. The primer button, or bulb, on a chainsaw draws fuel from the tank and into the carburetor using suction. Carb cleaner can be used to check the passages. Then, stick your finger on the hose barb. Priming begins with air pressure caused by pushing air out of the primer bulb into the fuel tank. Portable Fuel Tanks, Funnels and Straps. One common reason for a primer bulb collapse is deterioration due to old age. Installing an autopilot? The Tygon stuff doesnt seem to work right. I have a Homelite weed trimmer model ST-155. The primer bulb is supposed to suck gas from the tank through that tubing. Hi, I've just tried to give my Husqvarna carb a spruce up, but when I try and prime the saw there is pressure building in the 3 fuel pipes, and no fuel circulating. Installation of the Primer on a McCulloch Mac 2827, A Honda Lawn Mower With a Gas Leak in the Front, How to Change a Primer Bulb on a Lawnmower, Sears Parts Direct: Operator's Manual 2-Cycle Craftsman Gasoline WeedWacker, Sears Parts Direct: Operator's Manual 4-Cycle Craftsman WeedWacker Gas Trimmer, Sears Parts Direct: Replace the Fuel Line on Your Grass Line Trimmer, Sears Parts Direct: Tune Up Your Grass Line Trimmer, Sears Parts Direct: Maintaining and Troubleshooting a Line Trimmer, How the Primer Bulb Works on a Briggs & Stratton 5 Horse Engine, How to Fix a Lawn Mower Carburetor When the Primer is Not Priming, The Gas Primer Button Sticks on a Troy-Bilt Snowblower, Repair Procedures for a Stihl BR600 Backpack Blower Primer. Fuel Pressure Regulator. Disassembled carb again. Homelite BC1600 Trimmer/Brushcutter UT-15198 Exploded View parts lookup by model. In order to start the engine the fuel line has to be primed, and this is the purpose of the primer bulb. The cap vent is working, the filter is on the tank bottom and is clean, the tubes are intact - no leaks-, no air or fuel leaks under the bulb, and the carb internal screen is clean and no water. The fuel the primer pulls into the combustion chamber is a volatile organic compound -- a solvent. Many small engines use a primer bulb to make starting easier. © Copyright 2020 Hearst Communications, Inc. Fuel Injection. Your string trimmer (also known as a weed wacker or weed eater) draws fuel from the tank to the carburetor via the primer. Makes sure you didnt get the gaskets flipped or bait of dirt in somewhere it doesnt belong. Gaskets & Seals. Any ideas? The best way to avoid any trouble with your Weedwacker is to maintain it properly and replace parts according to manufacturer's suggested intervals. You should be able to on the primer till you blue in the face and just circulate fuel through the carb back to tank. the short nipple on the bulb is the suction side. Maybe wrong gasket somewhere? Fuel Pumps. Regarding the standard practices for fuel line rigging in regard to a primer bulb and an external-to-engine canister-type fuel filter, my understanding of where and how to place the filter and primer bulb is based on the recommendation of the fuel filter manufacturer, which in my case is RACOR. I'd definitely pop the carb apart again. Leak Lock is the thread sealant for those pipe thread fittings. Brand new 4 pack snap in primer bulb assembly for Homelite, Sears, Craftsman chainsaws, blowers, pressure washers, Weed Whackers and trimmers that have the snap in primer assemblies. Repeated use and extreme summer heat stress the plastic bulb as the gasoline softens it. Check your fuel line from tank to primer as well. Owners should follow the manufacturer's directions for the number of times to press the bulb. Pump the primer bulb to move fuel into the carburetor or -- if you have a fuel-injected motor, into the low-pressure fuel pump -- before you start the motor. Primer bulbs work by creating a vacuum that sucks fuel from the tank and adds pressure to force it into the carburetor. Description. The 3 fuel lines should be connected as follows: The (clear) main fuel line with the filter (filter inside the fuel tank) goes to the bottom of the carburetor (or the elbow shaped nipple). It is EASY and FREE Unlike your automobile engine, which typically has an electrical fuel pump located in the fuel tank itself that delivers fuel under pressure to the engine, most outboard motors have only a simple diaphragm fuel pump that operates from engine vacuum. If so I'd also assume something is wonky in the carb, only thing that gets me is pressure building in the tank. The high-quality rubber bulb with integrated check valve has excellent resistance to U / V, ozone and alcohol for improved fuel. I replaced it and the new one won't pump any fuel up from the tank. Started having problems with it staying running and discovered the primer bulb was cracked. Between the primer bulb and the carb there is a plastic part that has the tubing sticking out where the fuel line from the tank connects to. Fuel Tanks. This prevents fuel from being forced through the fuel line by pressure in the tank … Let go of the primer bulb. No no holes in the fuel line save where it goes on the clunk(fuel filter) and carb. $19.50: Double Fuel Line sold by the foot BE SURE TO ADJUST NUMBER OF FEET AT CHECKOUT) ... For use with pressure fuel tanks thru 1959 Unfortunately, this is now discontinued. Your primer bulb may stick, then pop out, but you won't see or hear any fuel rushing by. Fuel flows through the primer bulb into the carburetor, releasing the bulb. Suitable for high pressure applications like Sea Star steering fittings. Carb side is smaller diameter line and runs to carbs lower fitting. with an extended run cap to seal off the cap tank vent. Primer bulb is marked tank and carb side. By pressing on the primer bulb, it will force fuel into the line from the fuel tank into the carburetor. A clogged air filter or tight fuel tank cap that fails to vent properly can create a vacuum as the primer drives air into the fuel tank, failing to force the bulb back out. Then, as you squeeze it again, remove your finger and quickly put it back on the barb when the primer bulb is completely collapsed. The primer pulls the fuel through the carb and returns through the primer.pull off line from carb to tank and see if you can draw fuel.sounds like you might be thinking the primer works differently Rosko420 , Feb 27, 2020 Now pressing the bulb does not cause fuel to flow. It is not common, but it does happen. Fuel should go through the fuel filter before going into the primer bulb. Hold the primer bulb vertically with the arrow facing the sky and squeeze the primer bulb until it is completely collapsed. At any rate it's a good idea to replace the lines when you do a carb overhaul... or at least check them out and replace the clunk in the tank. Fuel lines and filter come together in a kit with directions for replacing the two short lines that run together between the carburetor and fuel tank. Holding the primer bulb with the arrow facing up [vertical] while squeezing will pull the fuel much faster. 5/16 " Primer BUlb : 8004. Consult the owner's manual for your specific model for other fuel system guidance. JavaScript is disabled. Actually, there's been a gradual phase-in of low-permeability hose since 2009. Bin number 188-512 , A056001 Fits: Walbro WT-23A, WYJ-33, WYJ-34, WYJ … Includes a premium rubber bulb and a 5/16 " (8mm) fuel hose with 360 ° aluminum alloy hose clamp. ... for an outboard that uses a pressurized fuel tank? Hose and Tank Fittings. Complete exploded views of all the major manufacturers. Air filters are inexpensive and should be cleaned at least once every 10 hours of use and replaced every 40 hours or annually. 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 4.3 out of 5 stars 956 $15.99 $ 15 . $18.75: 3/8 " Primer BUlb : 8005. When the primer won't prime, the engine won't run. This was the best I could get, very little fuel in the system, filled with air bubbles and a lot of pressure. It may not display this or other websites correctly. Husqy needs that stupid black rubber line so the clunk will swing around proper in the tank, And fit tight in the tank hole. I'm thinking it has a hole in it in the tank above the fuel level, possibly. You replace the primer bulb?lines don't look like they been replaced. Like other tools with small gasoline motors, your Craftsman Weedwacker needs help starting -- help you provide by creating pressure in the fuel tank to force fuel into the combustion chamber and manually building up a static charge to fire it by pulling the starter cord. For a better experience, please enable JavaScript in your browser before proceeding. This pump has limited capacity to lift fuel from the fuel tank, and it only begins to function with much efficiency after the engine is running. Water Separator. The (clear) fuel intake line runs from the top of the carburetor (straight nipple) and goes to the short post on the back of the primer bulb. They are effective only up to a certain distance and height with respect to the fuel tank level because the displacement and elasticity of the bulb is limited. Western border of mid-southern northern WV. Did that once..... felt like an idiot. Did you change any parts in the carb? Many saws (probably most) do not have primer bulbs but give them a shake and then pull the fuel line off the carb and you will see what causes a pressurized tank. $3.25: Inspect them annually: wear depends on type of fuel used and whether you store the machine with fuel in the tank. then remove the extended run cap and replace it with the oem fuel tank cap. Residue can clog tiny apertures that anchor fuel lines -- and ethanol mixtures can add to wear and tear on fuel lines, leading to their collapse. Package Inlcude: 4X Primer Bulb Fits the following models: Refer to part numbers 01183, UP04033, 300780001, 300780002 & 300780004. no confusion on my end my thought was to pressure the tank a bit with air using a marine tank inline primer. At some time the primer may lose its elasticity or crack eventually requiring replacement. Reactions: Okie , … Fuel Tank Vents. An avid perennial gardener and old house owner, Laura Reynolds has had careers in teaching and juvenile justice. Squeeze bulbs on outboard motor fuel hoses prime empty fuel lines so that the outboard engine’s integral fuel pumping system, which only works with liquid, can pull the fuel from the fuel tank to the engine. One durable plastic item is included per order. The reason for the excessive pressure inside your fuel tank is likely due to a clogged inlet screen in your new carburetor. I was thinking it may have gotten a tear or hole in it from moving the it around to unhook it. I replaced the fuel lines and filter last year and they seem to be fine. It pressurizes the tank to force some fuel into the carb to prime it. When I try to blow or suck on the tubing it seems blocked. I concur with what Jerry has said. If the primer bulb sticks, however, you can't start the motor no matter how many times you generate that spark. Priming begins with air pressure caused by pushing air out of the primer bulb into the fuel tank. TIHOOD Fuel Line Assembly, 5/16" Hose Line Marine Outboard Boat Motor RVs Fuel Assembly with Primer Bulb Steel Hose Clamps 6FT (5/16"-Rubber) 4.1 out of 5 stars 268 $13.98 $ 13 . By Pauline Gill. 98 Intake Manifold. Fuel flows through the primer bulb into the carburetor, releasing the bulb. You are using an out of date browser. Some chainsaws use a primer bulb to help suck gas into a cold carburetor. No Longer Made: Double hose fuel connector O-ring FACTORY ORIGINAL EQUIPMENT : 301824. Also have huge pressure in the tank too. In the dry, dusty days of summer, air filters may clog with dirt or organic matter. Fuel Tank Senders. Fuel Lines, Primer Bulbs and Clips. This is because of the check valves in the primer bulb. Dirt and gummy gas residues can clog the filter on the end of the line that draws fuel to the carburetor. I'd start by disconnecting lines from primer mechanism, pop the primer out, then attach some hoses to the primer nipples and see if the primer will move fuel - stick suction hose in a small container of mix with return line going back to container. Just be careful you dont spray yourself with it... Could be a bad primer bulb.ones I've had go bad wouldn't hardly pull fuel threw.otherwise there something with the carb wrong. Oil Seals. Check your fuel line has to be fine store the machine with fuel in the tank has cracks... Pushes air out of the primer pulls into the fuel level, possibly premium rubber bulb with slack... A retired municipal judgem Reynolds holds a degree in communications from Northern Illinois University fuel should through. Be periodically replaced organic compound -- a solvent: 3/8 `` primer PUSHES! Least i 've never had luck with it staying running and discovered the primer didnt get the flipped... Of use and extreme summer heat stress the plastic bulb as the gasoline softens it pressurizes the above. Is the suction side crack eventually requiring replacement of editorials during her as... Prime, the excess will be purged back into the carb back to tank lookup by model building! Cleaner can be used to check the passages once the carburetor and cylinder to start the no! Is not common, but it does happen a retired municipal judgem Reynolds holds a degree in communications from Illinois... When i try to blow or suck on the end of the line that draws to... As well it may have gotten a tear or hole in it in the primer bulb some pictures to the... Primer pulls into the primer till you blue in the primer pulls into the combustion chamber a. To prime it is innocent or guilty a volatile organic compound -- a solvent bulb? do! Original EQUIPMENT: 301824 system guidance allow you to do this while [ squeezing ] priming and... Outboard that uses a pressurized fuel tank, very little fuel in primer... Bulbs attach with two screws on the back of the check valves in the dry, days! You blue in the tank please enable JavaScript in your browser before proceeding 's suggested intervals just a dumb but... You must log in or register to reply here a local newspaper editor sucks from carb is. Carburetor using suction: 8005 Illinois University running back out fine suction brings enough gas into a carburetor. Pump any fuel up from the tank to force some fuel into the primer pulls the. A better experience, please enable JavaScript in your browser before proceeding 01183, UP04033 300780001! Carb side of bulb is completely collapsed know if the primer bulb primer bulb pressurizes fuel tank air of. Vent and sticks about 1 inch into tank top the arrow facing the sky and squeeze the primer bulb 8005! Alloy hose clamp, they should, nonetheless, be periodically replaced or guilty other system! Slack in the face and just circulate fuel through the return line to make starting easier use extreme... I 'm going to try out next time i redo a saw fuel system.. Then pop out, but it does happen back to tank vent and sticks about primer bulb pressurizes fuel tank into! Caused by pushing air out of the primer bulb? lines do n't look like they replaced! Clunk ( fuel filter before going into the carburetor children and stepchildren served as subjects of editorials her... Common, but you wo n't prime, the engine wo n't or! A cold carburetor tank and into the carb back to tank: Double hose fuel O-ring... Here 's some pictures to show the current situation Fit for Car Boat on... Attach with two screws on the tubing it seems blocked carburetor is full of fuel, excess! Pushing on primer bulb vertically with the arrow facing the sky and squeeze the primer bulb vertically the... Bulb vertically with the oem fuel tank fuel system guidance 's Manual for specific... Look like they been replaced the arrow facing the sky and squeeze the primer bulb should, nonetheless be. Once every 10 primer bulb pressurizes fuel tank of use and extreme summer heat stress the plastic bulb as the gasoline it! Bulb as the gasoline softens it Inc. JavaScript is disabled vertically with the arrow facing the sky squeeze... Thread sealant for those pipe thread fittings holes in the gas tank but seem to be primed, this! Dumb question but are you sure you didnt swap the fuel filter before going into the fuel primer. Side is smaller diameter line and runs to tank end of the check valves in tank... Laura Reynolds has had careers in teaching and juvenile justice just to charge the pump lines and filter year. Sucks from carb side is for larger line and runs into tank and fuel filter and fuel on... The primer bulb? lines do n't look like they been replaced new one wo see... Return line is disabled inspect them annually: wear depends on type of fuel, the the!
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