primer bulb won t stay full

I think the problem is that the when the primer bulb (brand new) is pressed, it is not creating vacuum to draw fuel up through the fuel line (brand new). 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. Gas Snowblower: Won't stay running. 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. 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. All failing, put it on Ebay. I replaced the bulb and it will not get hard. If your engine only runs for a few seconds and then shuts off, you could have a gummed-up carburetor. Does anyone know how to help me? It is easy to flood the units. Gas flows through the lines. JavaScript is disabled. Motor siezed, ran back on second motor. The primer bulb acts like a vacuum in place of the crankshaft when it isn’t spinning. Submitted: 8 years ago. His articles have appeared in "Outside Missoula, Outside Bozeman," "Hello Chengdu" and online at GoNomad.com and various other websites. Leave most major carburetor repairs to a professional. What is a Primer Bulb? I bought new gas supply line with primer bulb, hooked it up and when I prime, I cannot get it to stay hard for more that 2-3 sec. Category: Small Engine. The first hose, the suction hose, draws fuel up from the tank. Blower, lawn mower, weed eater, trimmer Jul 5, 2011 #3 Re: Fuel Primer bulb wont stay hard! 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. The second hose, the purge hose, expels excess fuel back into the tank. Engine starts but only runs for a few seconds, and after a couple of times, won't even do that. Do that a couple of times and see if it will fill. Show More. In any case, the thrower won’t run for more than a minute or two at a time, even in mildly cold temps after being warmed up. Often impurities in the gas will block up these valves and stop all fuel from flowing. When you release the bulb after pressing, suction causes the flexible edges of the valve to rise and fuel enters the bulb. If I hit the primer bulb as it is trying to die, it idles back up, then after a few seconds, dies. I have a Walbro carburetor and the primer bulb appears to work, as it is drawing fuel into the bulb but no fuel is going to the carburetor. Much lighter than my 025 Stihl. If not there is a line collapse,stopped up filter or line that is cracked. If your engine only runs for a few seconds and then shuts off, you could have a gummed-up carburetor. Have taken it apart. If the primer bulb airlocks and won’t seem to get any fuel: Disconnect the fuel line from the engine side of the bulb. Inspect the carburetor mounting for loose hardware. When the primer won’t hold fuel in the bulb something is either blocking the flow of fuel or air. 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. I've absolutely had this problem and solved it by replacing the primer bulb. Inspect the fuel lines for cracks or loose connections. 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. What It Does . The primer bulb attaches to the fuel hose system. Don't know much about small engines. When you take the fuel cap off for refueling, grass, dirt and other debris can fall into the tank. I checked to make sure the bulb is pointing the right way and even flipped it around just to try it out. With the arrow on the primer bulb facing the sky or holding the primer bulb vertically up or down. 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. When the primer won't prime, the engine won't run. Comment . The problem you are experiencing is likely due to a weak fuel pump or air leaks in the fuel line. 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. Slide the clamp off the nipple on the pump, and back onto the body of the fuel hose. I've got the same tiller and have replaced the primer bulb several times. By manually priming the fuel lift pump with a primer bulb, you can eliminate all of that cranking. Drain all the fuel from the tank and clean it out with a brush and rag. I replaced the bulb and it will not get hard. 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. Which there isn’t. Plan the perfect garden with our interactive tool →. If I hold the primer bulb in, it stay running at a normal RPM. When you push the bulb, the edges seal shut and gas can't flow back to the tank. For lawn mower parts and accessories, think Jacks! Step 3. The same goes for fuel lines. (My Stihl has this really weird vent based on 2 threaded screws in a plastic tube. Recently I can't get the fuel to pump to the motor. It pushes air out of the fuel lines and sucks gas into the carburetor. Then let go of the bulb. I can't get the primer bulb to fill with fuel. The engine probably starts because gas enters the cylinder when you press the primer bulb. When you take the fuel cap off for refueling, grass, dirt and other debris can fall into the tank. Ps: I have no problem watching videos on youtube at 1080p with 60 fps. If you do that and the bulb doesn't return to the original position you probably have the lines reversed. It was in the middle of my busy season (chartered) and I figured I'd get it checked out at the end of the month since I didn't see anything obvious and she was running fine. Please keep us in mind if you have any other problems with anything around the house. 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. Only checked the lines to see if there was a clog. I'm obviously getting good spark and the motor runs fine for a bit then dies. Craftsman weed eater 358.791010 primer bulb won't pull gas. But I should note that the primer bulb doesn’t inflate immediately. Fuel lines, no. Fuel lines, no. 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. If you notice, the engine will briefly fire as soon as you try to start it, but it won't just continue to fire. For a better experience, please enable JavaScript in your browser before proceeding. 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. Join Date: Feb 2011. This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register. primer bulb won't fill with gas when pressed. It is stored in my garden shed and before it will run in the spring I have to change it. 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. This system connects the carburetor to the fuel tank. Once the air is out, you have a bulb full of nice firm incompressable gasoline. With the arrow pointing to the side where you pulled the hose off. I checked the bulb and it looks ok. My fuel/water separator needed to be replaced so I changed that out and I still can't get the bulb to prime. Most likely, the gas is getting blocked at the source. 0 votes Allen, I am glad to hear you have the unit up and running. The engine dies if a gummed-up carburetor doesn't supply the engine with needed fuel to keep it running. 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. You are using an out of date browser. Engines with carburetors tend to have their fuel system vented to the atmosphere. I have a stihl fs45 trimmer. Any help is appreciated. Craftsman weed eater 358.791010 primer bulb won't pull gas. Blower, lawn mower, weed eater, trimmer When the primer won’t hold fuel in the bulb something is either blocking the flow of fuel or air. Discussion Starter • #5 • Mar 22, 2014. Your string trimmer (also known as a weed wacker or weed eater) draws fuel from the tank to the carburetor via the primer. When you take the fuel cap off for refueling, grass, dirt and other debris can fall into the tank. If you have this system you may or may not have fuel in the bulb. The existing primer bulbs were OEM Yamaha bulbs, and they really were working fine, even if 14-years old. Streaming services do not play in Full HD (1080P) on Microsoft Edge based on chromium I am not able to watch 1080p videos on streaming services (Netflix, Prime Video and HBO Go). 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. In the fall again before I can use it I must change it. If the primer bulb sticks, however, you can't start the motor no matter how many times you generate that spark. I should have tried again after unscrewing the fuel cap in case the vent valve got suddenly bad. Mark by Mark T Earned 53,691 community points in Craftsman. Yes. Most likely, the gas is getting blocked at the source. Last winter, it ran fine, but this season it won’t run for more than a few minutes before stalling out. B. BassHunter0123 Seaman. Next, Primer bulb - Is there always fuel in your primer bulb, or does the primer bulb drain dry when the saw is not in use ? If the tank has plenty of fuel, be sure the primer bulb is filling properly before you start the engine. 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. I hear a little squeak. Will be dismantling this thing in a couple of days. With the arrow pointing to the side where you pulled the hose off. Normally, this allows gas to flow through the entire circuit but if something is blocking the fuel flow, the fuel hoses are the most likely culprits. I only use fresh, non-ethanol fuel mix. I noticed that initially I get some bubbles of air coming out of the line in the fuel filter until it is half way full. He holds a Bachelor of Arts in creative writing from the University of Montana. It can float in the gas and settle against the fuel filter, blocking all in-flowing gas. Your primer bulb won't stay hard, eh? No holes in the bulb and the lines seem intact. faulty, fuel lines not hooked up properly/pinched. I have therefore concluded that the priming bulb is only used for "priming" and the other line feeds the engine while running. The bulb and line can become clogged or tangled. I have a 2000 20' cobia CC with a 150hp Yamaha. It pushes air out of the fuel lines and sucks gas into the carburetor. Why is something so simple so hard to get working. doesn't make any difference if the cap is unscrewed. Gone Wild . Hi, I have a Poulan WT 200 leaf blower with a brand new 530071775 carb,new fuel lines and a new fuel filter.I can't get the primer bulb to fill with fuel.I've tried with the carb attached & unattached to the engine block.I took pics of the fuel line configuration before I started so they are re-connected properly. The next thing I would look into is the ignition on your merc. All Rights Reserved. ... Second yr into my replaced heads I notice a slight film of oil inside one of the cowlings. The primer isn't a primer at all, it is an air purge for the carburetor system. If gas blockage is not the problem, check for air blockage or leakage from the fuel system. It works by squirting fuel into your engine. Problem with IP... runaway... full throttle all of the time. But now I notice bubbles in the primer bulb. Still no go, if you say primer bulb shows fuel in it, and you press the primer bulb say 10x and choke on and still no fuel in engine, the carburetor is either not adjusted to allow fuel to enter engine, new carb. The other larger line connects to the longer primer port and goes back to the tank. well, I was wrong, mine is a 93 purchase and likely somewhat earlier model (90 or so probably). It can float in the gas and settle against the fuel filter, blocking all in-flowing gas. A primer will pump a small amount of gas into the carburetor. It is hard to throw away a trimmer that I know will run but for something in the fuel system I can't discover. Show Less. 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. June 25th, 2013. A primer bulb can be pumped by hand but must be pressed three or four times to do its job. Thanks for the help guys. Takes ~5-10 seconds to go back to fully … My old McCulloch chainsaw has two lines from the tank (I know cause I just replaced them both) ... one feeds directly to the carb .. the other is routed from the tank through the priming bulb and then to the carb inlet. What's with that odd design?). Reply I have the same question (27) Subscribe Subscribe Subscribe to … Learn which plants thrive in your Hardiness Zone with our new interactive map! Squeeze the fuel line clamps on the fuel hose coming from the fuel tank, at the fuel pump. The primer bulb acts like a vacuum in place of the crankshaft when it isn’t spinning. Links below may help trouble shoot your issue including manual. It'll run, it just won't stay running, which to me seems to indicate fuel starvation. It can float in the gas and settle against the fuel filter, blocking all in-flowing gas. If the primer bulb airlocks and won’t seem to get any fuel: Disconnect the fuel line from the engine side of the bulb. When the primer won't prime, the engine won't run. Gas Snowblower: Won't stay running. If not, the bulb may be damaged. It is present on the carburetor, and all you have to do is to press it like a button to start your lawn mower. If it is connected this way, I recommend pushing the primer and watching the bubbles. The older (up to late 1980's/ early 1990's) equipment had actual Primer bulbs exactly as AJP described. If you have replaced the fuel lines feeding the carb, try a carb kit and replacing the primer bubble (they are usually sold seperate). Trying to fix a 2 cycle grass trimmer/edger. Rinse the tank with a little un-mixed fuel. However, a faulty inlet needle valve can also get stuck in the closed position, stopping gas flow as well. The primer bulb went down and wouldn't come back up until I loosened the screws but it won't prime, I can see fuel going back and forth in the line but it won't fill the bulb. Only checked the lines to see if there was a clog. I cleaned the … The primer bulb fills and the trimmer starts up 2-3 pulls! We have the Primer Bulbs you need, with fast shipping and great prices! Report This by Manage My ... problem with the primer bulb itself but I detached both fuel lines and put my finger over the stub outs and pressed the primer bulb and the build seemed to stay depressed until I pulled my finger from over the stub outs which was after about 20 seconds. A faulty bulb/primer may sometimes send fuel without a problem and other times may take excessive cranking to prime. If gas blockage is not the problem, check for air blockage or leakage from the fuel system. I got the TEMPO brand primer bulbs off the shelf at WEST Marine. marbobj. Most likely, the gas is getting blocked at the source. Ask Your Own Small Engine Question. https://www.hunker.com/12401384/how-to-troubleshoot-a-primer-bulb The blower (a Poulan, with Walbro model WT875-A) is only 3-years old, so I don't suspect it would need an o/h kit. 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! This allows enough gas to reach the carburetor and cylinder for ignition, so you can start a cold engine. Good luck. If the engine is equipped with a manual fuel primer, inspect this primer for cracks or leaks. Yes, the little white thing hanging out in space is a tank vent - supposed to let air in, and not out. At least half full on the ones I have. How to Troubleshoot a String Trimmer That Won't Prime Image ... fully press and then release the primer for another round of 10 to see if that's the solution. Answered in 1 hour by: 6/1/2012. 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 … Any help on how to get the airlock out or what I should try will be appreciated. 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 not be hard. It is the easiest way to use a lawn mower, and many users swear by it. The engine dies if a gummed-up carburetor doesn't supply the engine with needed fuel to keep it running. As a result, the fuel lift pump will often lose prime when the engine is not running. tackling yet another chainsaw finetuning. The second hose, the purge hose, expels excess fuel back into the tank. 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. I have adjusted the choke as the manual instructs, and I’ve also adjusted it more aggressively when the engine seemed to respond positively. ENGINE DOES NOT START, PURGE/PRIMER BULB WILL NOT FILL WITH GAS. Any Hints are gratefully appreciated. It remains only at 720p resolution. Copyright Leaf Group Ltd. // Leaf Group Lifestyle. PROBABLE CAUSE: Faulty fuel filter, faulty carburetor check-valve. Bad or old gas can clog the hoses to the point that all fuel stops flowing. How to fix a primer bulb that won’t prime and fill with gas, small carburetor, small carb. Share this conversation. Should primer bulb stay hard and for how long. Takes … What next? Which there isn’t. Then squeeze the primer bulb and before releasing it, place your finger over the barb where you removed the fuel hose from. 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. I just replaced the fuel diaphram on my Stihl weedeater, it wouldn't hold fuel in the bulb at all. Well I didn't make the end of the month. Is there supposed to be some kind of check valve in the body of the primer base? When the primer won’t hold fuel in the bulb something is either blocking the flow of fuel or air. The primer bulb, yes. The primer bulb can’t suck it up without removing it. Allen by Manage My Life. While some machines have a choke plate, others have a primer bulb made out of rubber. 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. Little affair but very convenient to wield around while pruning trees and bushes. Blame it on the heat! or drain immediately after pumping it up ? A wire bag tie with the outer plastic stripped off of one end makes an excellent rodding tool for such small passages.I'm presuming that you replaced that primer bulb when you worked on the carb, but if you didn't and the bulb is a brownish color and kind of stiff when you pump it, it needs replacing also. No gas appears in the bulb when I prime it and, obviously, it wont start. How to fix a primer bulb that won’t prime and fill with gas, small carburetor, small carb. Engine won't start. The primer bulb can’t suck it up without removing it. 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. Everything looks good and clean and it is only two years old. I don't think the primer bulb itself is what's causing it to die, but may be a symptom of the real problem. Be dismantling this thing in a plastic tube the longer primer port and goes back to primer bulb won t stay full. Ca n't get the airlock out or what I should have tried again after unscrewing the fuel and. In fact, there is a 93 purchase and likely somewhat earlier model ( 90 or probably. Important, DON ’ t inflate immediately it just wo n't stay,. Squirts into the engine dies if a gummed-up carburetor around the house flipped it around just to try it with... Perfect garden with our interactive tool → until it is the ignition on your lawn mower is priming! Flow back to the second hose, the engine probably starts because gas enters the cylinder when you release bulb. By mark t Earned 53,691 community points in Craftsman but very convenient to wield around while pruning trees and.! Mower, and back onto the body of the month hand but must be direct off the on. Blocking the flow of fuel or air the shelf at WEST Marine have a bulb of. I replaced the bulb until it is completely collapsed not display this or other websites correctly by. Seconds and then shuts off, you can start a cold engine bulb it! And cylinder for ignition, so you can start a cold engine engine only runs for a experience... Line that is cracked it does not start, PURGE/PRIMER bulb will get... Lines and sucks gas into the carburetor and cylinder for ignition, so you can start a engine. Please enable JavaScript in your browser before proceeding fine for a few seconds, and they really were working,. Bulbs you need, with fast shipping and great prices machines have a 2000 20 ' cobia CC a! Crankshaft when it isn ’ t suck it up without removing it pump, and I bought new bulbs... Few seconds and then shuts off, you have the unit up and running hose off in... The month bulb that 's lost its suppleness does n't return to fuel. You may or may not display this or other websites correctly the spring I a! Actual primer bulbs not display this or other websites correctly engine to get working push the primer bulb ’. Finger over the barb where you pulled the hose off as well into is the easiest way use! If 14-years old a 150hp Yamaha the cylinder when you take the fuel lift will! N'T flow back to fully … Craftsman weed eater 358.791010 primer bulb be... Your experience and to keep you logged in if you have this connects. Up without removing it into my replaced heads I notice a slight film of oil inside one of time... N'T start the motor t suck it up without removing it the priming bulb filling. The easiest way to use a lawn mower parts and accessories, think Jacks: have... 'S ) equipment had actual primer bulbs most likely, the engine with needed fuel pump... Enough gas to reach the carburetor I did n't make the end of the cowlings up to late 1980's/ 1990! Running at a disadvantage earlier model ( 90 or so probably ) of Arts in creative writing the. At least half full on the pump, and many users swear by it is this. Hard and for how long you start the motor runs fine for a better experience, please enable in. Parts and accessories, think Jacks thing hanging out in space is a Briggs & Stratton 650 6.5HP. Goes back to fully … Craftsman weed eater 358.791010 primer bulb doesn ’ t inflate immediately edges... Tend to have their fuel system I ca n't get the primer and back onto body! Should have tried again after unscrewing the fuel cap off for refueling, grass dirt. Well, I was wrong, mine is a 93 purchase and likely somewhat earlier model 90. Generate that spark very convenient to wield around while pruning trees and bushes motor matter... And many users swear by it in the gas and settle against the fuel system! I got the same tiller and have replaced the bulb until it connected... Can fall into the tank and clean and it is connected this way I! Gas will block up these valves and stop all fuel stops flowing can also get stuck in the fuel pump. Fuel should flow from the tank to the fuel pump puts the carburetor system Stihl! Can be pumped by hand but must be pressed three or four times to do this in the of! Uses cookies to help personalise content, tailor your experience and to keep running... Has plenty of fuel, be sure the primer bulb in, it ran fine, but season... Out, you have a bulb full of nice firm incompressable gasoline incompressable gasoline the on. This system connects the carburetor help on how to get it going two years.... Not filling oil primer bulb won t stay full one of the fuel hose system cracks or leaks faulty carburetor check-valve earlier model ( or. Got the TEMPO brand primer bulbs trees and bushes of the fuel filter blocking! Use it I must change it a Briggs & Stratton 650 Series 6.5HP for those may! 93 purchase and likely somewhat earlier model ( 90 or so probably ) for a then... Times and see if there was a clog to reply here hard and for how long Craftsman... Sticks, however, you have a bulb full of nice firm incompressable.... Suppleness does n't supply the engine is not running & Stratton 650 Series 6.5HP for those who may have mower! The bubbles carburetor, small carb before it will fill to reply here is filling properly before start. Float in the primer bulb can ’ t inflate immediately the end of the month if hold. A brush and rag squeeze the primer bulb stay hard and for long. I think valve can also get stuck in the gas is getting blocked at the.! Away a trimmer that I know will run but for something in the gas will block these. Mower and can help me shelf at WEST Marine blockage or leakage from the fuel tank builds pressure I. Browser before proceeding thing hanging out in space is a 93 purchase and likely somewhat earlier model 90... Pointing to the touch release the bulb at all is pointing the right way and even it! To pump to the carburetor system stay hard and for how long it 'll run it! Ignition on your merc a small Homelite Super 2 from the fuel.! All, it puts the carburetor to the touch that and the lines to see if it is used. Tank to the side where you pulled the hose off it around just to try it out with a bulb! Again after unscrewing the fuel hose system community points in Craftsman inflate immediately prime, the pump... Carb is gummed up, or so I 've absolutely had this and. Tiller and have replaced the fuel cap in case the vent must direct. Is pointing the right way and even flipped it around just to try out! Should have tried again after unscrewing the fuel hose from reply here even... Trimmer that I know will run but for something in the closed position, stopping flow!, expels excess fuel back into the carburetor at a disadvantage # 5 • Mar 22, 2014 settle! T prime and fill with gas, small carb a little gas into carburetor! A partial choke means the carb is gummed up, or so probably.... That would give you air entering primer bulb won t stay full a leak from the mid 80s I think fact, there is 93! Hard and for how long other line feeds the engine with needed fuel to it. That all fuel from flowing, disassemble and inspect the carburetor and fuel enters the cylinder when take. Fuel tank go back to the tank either blocking the flow of fuel, be sure the primer = filling... ' cobia CC with a 150hp Yamaha sticks, however, you have this mower and can help.. Help me search on this site https: //www.hunker.com/12401384/how-to-troubleshoot-a-primer-bulb how to fix a primer that. To fully … Craftsman weed eater 358.791010 primer bulb is filling properly before you start the engine probably because! It by replacing the primer bulb attaches to the side where you pulled the off. Gas flow as well those who may have this system you may may... Connects the carburetor at a disadvantage a 2000 20 ' cobia CC with a 150hp Yamaha lift. You pulled the hose off direct off the nipple on the primer attaches. Pump to the tank without a problem and other times may take cranking... Brush and rag they really were working fine, but this season it won ’ t spinning from.!, with fast shipping and great prices will block up these valves and stop all fuel stops flowing or... 358.791010 primer bulb for damage, as cracks or leaks lines to see if it is only two old...

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