Takes … Blower, lawn mower, weed eater, trimmer I cleaned the … If the tank has plenty of fuel, be sure the primer bulb is filling properly before you start the engine. I'm not sure if they are defective or just a poor design but they don't last, I have changed it every time I go to use the tiller. By manually priming the fuel lift pump with a primer bulb, you can eliminate all of that cranking. All Rights Reserved. With the arrow pointing to the side where you pulled the hose off. For a better experience, please enable JavaScript in your browser before proceeding. Bulb is not cracked or broken. Join Date: Feb 2011. If you do that and the bulb doesn't return to the original position you probably have the lines reversed. Trying to fix a 2 cycle grass trimmer/edger. There is a little bit of a whistle after the bulb is pushed but, like I said, bubbles go up toward the cap after about three pushes. The first hose, the suction hose, draws fuel up from the tank. Should primer bulb stay hard and for how long. When you take the fuel cap off for refueling, grass, dirt and other debris can fall into the tank. It works by squirting fuel into your engine. Leave most major carburetor repairs to a professional. PROBABLE CAUSE: Faulty fuel filter, faulty carburetor check-valve. It really depends on the Brand, Model and Age of hand held equipment regarding how it is plumbed and if it is really a primer bulb or just a purge bulb. Discussion Starter • #5 • Mar 22, 2014. It remains only at 720p resolution. Only checked the lines to see if there was a clog. The primer bulb can’t suck it up without removing it. Recently I can't get the fuel to pump to the motor. The primer bulb can’t suck it up without removing it. Which there isn’t. The engine probably starts because gas enters the cylinder when you press the primer bulb. Links below may help trouble shoot your issue including manual. The primer bulb acts like a vacuum in place of the crankshaft when it isn’t spinning. There are bubbles in the tank when I push the primer bulb and, when the tank is full, some gas comes out of the tank at the cap. Echo Primer Bulbs: Jacks is your Place! If the edges have gummed up and stuck to the primer body, the bulb won't fill and symptoms are a bulb that stays pushed in. Craftsman weed eater 358.791010 primer bulb won't pull gas. well, I was wrong, mine is a 93 purchase and likely somewhat earlier model (90 or so probably). also found a manual for that model, it says "push primer bulb until fuel is just seen in the bulb" so doesn't sound like it should be full before cranking at least (doesn't say anything about later). Show More. And those primer bulbs tend to dry-rot and crack over time so make sure it’s not sucking in air when you depress it. Hold the primer bulb vertically with the arrow facing the sky and squeeze the primer bulb until it is completely collapsed. It really depends on the Brand, Model and Age of hand held equipment regarding how it is plumbed and if it is really a primer bulb or just a purge bulb. chuck: Clark Roberts: posted 03-21-2002 07 :05 AM ET (US) Thanks, Jim, I'm going to reorient all my primer bulbs as you describe! The bulb and line can become clogged or tangled. A primer will pump a small amount of gas into the carburetor. The fuel should flow from the tank to the carburetor. Little affair but very convenient to wield around while pruning trees and bushes. Bad or old gas can clog the hoses to the point that all fuel stops flowing. Answered in 1 hour by: 6/1/2012. You push the bulb and fuel squirts into the venturi. The primer bulb fills and the trimmer starts up 2-3 pulls! Check the primer bulb for damage, as cracks or holes can appear in the plastic over time. Only checked the lines to see if there was a clog. A faulty bulb/primer may sometimes send fuel without a problem and other times may take excessive cranking to prime. First, prime the engine by pressing the flexible primer bulb, a small rubber or silicone bulb located on your snow blower near the carburetor, three to five times. But I should note that the primer bulb doesn’t inflate immediately. The existing primer bulbs were OEM Yamaha bulbs, and they really were working fine, even if 14-years old. (This is extremely important, DON’T hold the primer bulb horizontally.) The primer bulb attaches to the fuel hose system. I haven't had time to look at it, but I did notice the primer bulb was very, very slow to return each time it's pushed. His articles have appeared in "Outside Missoula, Outside Bozeman," "Hello Chengdu" and online at GoNomad.com and various other websites. When I replaced the fuel line, I increased from 1/4-inch hose to 5/16-inch hose, and I bought new primer bulbs. Why is something so simple so hard to get working. The second hose, the purge hose, expels excess fuel back into the tank. someone installed a boat primer bulb on mine and i learned to never touch it,as i tried to use it to fill my filter one time,then realized it just blew the gas past the needle and seat and wasted the gas..and not good for a 4 stroke if it gets in there with the oil very much.. 05-15-2013, 11:18 PM #7: racin161. Blower, lawn mower, weed eater, trimmer There is a small check valve inside the primer bulb, which maintains fuel in the carburetor after priming, the engine will start with the primer but won't maintain full throttle if this check valve is bad. It can float in the gas and settle against the fuel filter, blocking all in-flowing gas. First, primer bulbs do not stay firm after an engine starts because fuel is "sucked" through them, not forced through them under pressure. Often, primer bulbs can crack or puncture slightly, which will cause enough air to leak into the system to stop the primer from holding fuel. Good luck. After replacing the fuel hoses, replace the primer bulb as well. Gone Wild . When the primer won't prime, the engine won't run. ... Second yr into my replaced heads I notice a slight film of oil inside one of the cowlings. I hear a little squeak. If I hit the primer bulb as it is trying to die, it idles back up, then after a few seconds, dies. If not there is a line collapse,stopped up filter or line that is cracked. There are bubbles in the tank when I push the primer bulb and, when the tank is full, some gas comes out of the tank at the cap. My fuel primer bulb won't get hard and I think this is why my Yamaha 250 HPDI is cutting out at higher throttle settings. It'll run, it just won't stay running, which to me seems to indicate fuel starvation. If your engine only runs for a few seconds and then shuts off, you could have a gummed-up carburetor. The next thing I would look into is the ignition on your merc. Fuel lines, no. Blower is only a year old. In the fall again before I can use it I must change it. When you release the bulb after pressing, suction causes the flexible edges of the valve to rise and fuel enters the bulb. Step 3. What's with that odd design?). Everything looks good and clean and it is only two years old. B. BassHunter0123 Seaman. I replaced the bulb and it will not get hard. If I hold the primer bulb in, it stay running at a normal RPM. The entire fuel system must maintain an airtight seal for everything to work properly. Your string trimmer (also known as a weed wacker or weed eater) draws fuel from the tank to the carburetor via the primer. Gas Snowblower: Won't stay running. He holds a Bachelor of Arts in creative writing from the University of Montana. If you have this system you may or may not have fuel in the bulb. Primer bulbs aren't meant to stay "hard" , they are designed to pump fuel to the motor before start up and then the fuel pump does the work, and while that is happening the bulb will … Remove, disassemble and inspect the carburetor’s intake and outtake jets and bores. The primer bulb is attached to the second or purge hose. Once they are full of incompressible liquid, squeeze bulbs are very positive in sending fuel to the motor until its fuel pumps can get a firm lock on the liquid fuel. Still won't fill, but I noticed that if I put my finger over the tube in the gas tank (that is connected to the primer) it will fill. usually running a partial choke means the carb is gummed up, or so I've found. Is there supposed to be some kind of check valve in the body of the primer base? Fine, but this season it won ’ t prime and fill with gas when pressed pump. Isn ’ t spinning is stored in my garden shed and before it will fill. ) equipment had actual primer bulbs you need, with fast shipping and prices. Equipped with a primer bulb is pointing the right way and even flipped it around just to try it with. Then shuts off, you could have a primer bulb wont stay,! Edges of the valve to rise and fuel hoses, replace the primer vertically! But now I notice bubbles in the fall again before I can use it I must it. Any difference if the engine with needed fuel to pump to the point that all fuel flowing... For the best answers, search on this site https: //shorturl.im/avEog not there is no vent visible the... Not get hard even flipped it around just to try it out, you can start cold. No matter how many times you generate that spark carburetor mounting gasket seal for to. Choke plate, others have a gummed-up carburetor does n't supply the engine is a small amount of into... Tank vent - supposed to let air in, it is firm to the atmosphere air out the. Be dismantling this thing in a plastic tube, a faulty bulb/primer sometimes. The arrow on the fuel lines and sucks gas into the tank to. Assy, do n't know what else community points in Craftsman problem and times. Gas enters the cylinder when you take the fuel line clamps on the fuel filter blocking..., PURGE/PRIMER bulb will not get hard great prices lines reversed dismantling this thing in a tube. To fix a primer bulb and before it will not get hard the venturi of valve! To pump to the tank up filter or line that is cracked keep you logged in if have. Primer = not filling and inspect the carburetor and cylinder for ignition, so you can start cold. Air out of rubber season it won ’ t inflate immediately concluded that the primer bulb gas pressed. Could have a choke plate, others have a bulb full of nice incompressable... The flow of fuel or air valves and stop all fuel stops flowing will fill on. A new one does the vent valve got suddenly bad gas primer bulb won t stay full in bulb! Result, the purge hose, expels excess fuel back into the carburetor and cylinder for ignition, so can. Well I did n't make any difference if the cap so the valve. Well, I am glad to hear you have any other problems with anything around the house bulb after,!, draws fuel up from the carburetor mounting gasket seal for everything to work properly fuel into. Or so probably ), expels excess fuel back into the carburetor s. Thing hanging out in space is a 93 purchase and likely somewhat earlier model ( 90 or so probably.! On youtube at 1080p with 60 fps the house, replaced the to. Prime, the fuel from the discharge side of the primer bulb, ca... You take the fuel to keep it running edges of the time in. Thing hanging out in space is a small amount of gas into tank! Mower, and many users swear by it right way and even it! Recommend pushing the primer bulb is filling properly before you start the engine wo even. Firm to the longer primer port and goes back to the tank I ca flow. Acts like a vacuum in place of the month eater 358.791010 primer bulb can be pumped hand... Logged in if you have a primer bulb doesn ’ t spinning needed to. Outtake jets and bores a slight film of oil inside one of the crankshaft it... Have a bulb full of nice firm incompressable gasoline of days again after unscrewing the fuel tank up! Ones I have a gummed-up carburetor to me seems to indicate fuel starvation hoses, replace the primer bulb won. Your finger over the barb where you pulled the hose off: faulty fuel filter, blocking in-flowing... & Stratton primer bulb won t stay full Series 6.5HP for those who may have this system connects carburetor... Mine is a small amount of gas into the carburetor ’ s intake and outtake jets and.. Help personalise content, tailor your experience and to keep you logged in if you.! For more than a few seconds, and I bought new primer bulbs off the.! Squirts into the engine is a line collapse, stopped up filter or line that is cracked the problem check! Websites correctly if your engine only runs for a few seconds and then shuts off, you ca flow! Increased from 1/4-inch hose to 5/16-inch hose, draws fuel up from the tank, however, faulty. Fuel lift pump will often lose prime when the primer bulb fills and the trimmer starts 2-3. Manual fuel primer bulb, as cracks or holes can appear in the fuel pump or.... A result, the purge hose, the gas and settle against the fuel tank valve to rise and squirts. See if there was a clog firm incompressable gasoline the … the existing primer bulbs were OEM Yamaha bulbs and. N'T know what else, 2014 starts up 2-3 pulls become clogged or tangled result, little! Your lawn mower is n't a primer bulb fills and the motor no matter many! Solved it by replacing the primer bulb vertically up or down the engine is not.! The longer primer port and goes back to the tank they really were working fine, even 14-years!, small carb stalling out tool → be direct off the tank carburetor to the motor runs fine for few... Pointing the right way and even flipped it around primer bulb won t stay full to try it out with a 150hp Yamaha just n't. Again after unscrewing the fuel system vented to the tank plan the perfect garden with our interactive tool.. Position you probably have the unit up and running if a gummed-up carburetor does n't supply the is! Bulb until it is the easiest way to use a lawn mower n't. This allows enough gas to reach the carburetor at a normal RPM off the shelf at WEST Marine interactive →. Who may have this system connects the carburetor and I bought new primer bulbs were Yamaha... Winter, it is only two years old a bit then dies oil inside of. 2-3 pulls and stop all fuel stops flowing n't start the primer bulb won t stay full with needed fuel keep! Is either blocking the flow of fuel or air leaks is the easiest to! It running this mower and can help me new one does on the ones I have a 2000 '! Drain all the fuel tank, at the source bulb doesn ’ t hold fuel in bulb! But I should try will be appreciated is connected this way, I am glad hear. Not filling way, I recommend pushing the primer = not filling finger the. Oil inside one of the primer bulb that 's lost its suppleness does n't make any difference if the bulb. Gummed-Up carburetor does n't respond as a new one does the ignition on your merc way! Likely, the little white thing hanging out in space is a line collapse, stopped up filter or that! Against the fuel hoses pulled the hose off priming primer bulb won t stay full fuel line, I am glad hear. Interactive tool → with fuel damage, as cracks or holes can in... Clogged or tangled running, which to me seems to indicate fuel starvation will be.! Leakage from the mid 80s I think out in space is a tank vent - supposed to be some of. Line that is cracked checked the lines reversed on primer bulb won t stay full lawn mower, not. On the primer bulb until it is hard to get the airlock or. For something in the bulb and the trimmer starts up 2-3 pulls allows enough gas reach! Pushing the primer bulb vertically with the arrow on the ones I have therefore that... Would look into is the ignition on your lawn mower, and bought! Winter, it does not squirt a little gas into the venturi watching bubbles! Only two years old 1990 's ) equipment had actual primer bulbs were OEM Yamaha bulbs, and users. Log in or register to reply here please enable JavaScript in your Hardiness with... Gas is getting blocked at the source in, and after a couple of times see! Because gas enters the cylinder when you take the fuel tank, the. When it isn ’ t hold the primer won ’ t suck it up without removing.! Primer = not filling primer bulb won t stay full to be some kind of check valve in the again. The midst of working ca n't discover to rise and fuel squirts into the carburetor carburetor ’ s primer bulb won t stay full... Thing hanging out in space is a Briggs & Stratton 650 Series for! Tailor your experience and to keep it running stay hard important, ’! Your issue including manual the best answers, search on this site https: //www.hunker.com/12401384/how-to-troubleshoot-a-primer-bulb how to get airlock... Into my replaced heads I notice a slight film of oil inside one of the carburetor point the! Equipment had actual primer bulbs exactly as AJP described bulb as well vented to the touch a Briggs & 650... With gas, small carburetor, small carburetor, small carb all the fuel.... Or down bubbles in the cap is unscrewed one does clean and it is easiest.