Any help on how to get the airlock out or what I should try will be appreciated. Yes. Ask Your Own Small Engine Question. Any help on how to get the airlock out or what I should try will be appreciated. Takes … I cleaned the … Then let go of the bulb. 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. Thanks for the help guys. Everything looks good and clean and it is only two years old. 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. The primer bulb attaches to the fuel hose system. If gas blockage is not the problem, check for air blockage or leakage from the fuel system. ENGINE DOES NOT START, PURGE/PRIMER BULB WILL NOT FILL WITH GAS. (My Stihl has this really weird vent based on 2 threaded screws in a plastic tube. By manually priming the fuel lift pump with a primer bulb, you can eliminate all of that cranking. The same goes for fuel lines. But I should note that the primer bulb doesn’t inflate immediately. Report This by Manage My Life. At least half full on the ones I have. 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. When you take the fuel cap off for refueling, grass, dirt and other debris can fall into the tank. If the primer bulb airlocks and won’t seem to get any fuel: Disconnect the fuel line from the engine side of the bulb. But now I notice bubbles in the primer bulb. tackling yet another chainsaw finetuning. I have adjusted the choke as the manual instructs, and I’ve also adjusted it more aggressively when the engine seemed to respond positively. A primer bulb can be pumped by hand but must be pressed three or four times to do its job. Gas Snowblower: Won't stay running. On the Eighth day of MUD Xmass MUD Santa gave to Me ......... 1971 Fj40 - Fuel Injected - Full Cage - Pics & Video - Locked & Built. No holes in the bulb and the lines seem intact. 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 problem you are experiencing is likely due to a weak fuel pump or air leaks in the fuel line. Plan the perfect garden with our interactive tool →. It pushes air out of the fuel lines and sucks gas into the carburetor. This allows enough gas to reach the carburetor and cylinder for ignition, so you can start a cold engine. When the primer won’t hold fuel in the bulb something is either blocking the flow of fuel or air. 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. Rinse the tank with a little un-mixed fuel. June 25th, 2013. If the tank has plenty of fuel, be sure the primer bulb is filling properly before you start the engine. I replaced the bulb and it will not get hard. I replaced the bulb and it will not get hard. Does anyone know how to help me? All failing, put it on Ebay. We have the Primer Bulbs you need, with fast shipping and great prices! Problem with IP... runaway... full throttle all of the time. JavaScript is disabled. Bulb is not cracked or broken. The primer bulb acts like a vacuum in place of the crankshaft when it isn’t spinning. Classifieds - Engine/Transmission/Transfer Case, BJ42 | FJ43 | BJ44 | FJ45 | FJ45LV | HJ47, North American Clubhouses - Central Region, CA.AB- Rocky Mountain Land Cruiser Association, CO/WY- Horsetooth 4 Wheelers Cruiser Club, TX- Lone Star Land Cruisers - Austin Chapter, TX- The White Trash of the Elwood Chapter, CA.BC- Okanagan-Similkameen Land Cruisers, NV- Battle Born Cruisers of Northern Nevada. The bulb and line can become clogged or tangled. Your primer bulb won't stay hard, eh? 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. Gone Wild . It is present on the carburetor, and all you have to do is to press it like a button to start your lawn mower. doesn't make any difference if the cap is unscrewed. https://www.hunker.com/12401384/how-to-troubleshoot-a-primer-bulb Drain all the fuel from the tank and clean it out with a brush and rag. Joined May 29, 2011 Messages 65. If your engine only runs for a few seconds and then shuts off, you could have a gummed-up carburetor. Jul 5, 2011 #3 Re: Fuel Primer bulb wont stay hard! Craftsman weed eater 358.791010 primer bulb won't pull gas. The engine dies if a gummed-up carburetor doesn't supply the engine with needed fuel to keep it running. faulty, fuel lines not hooked up properly/pinched. Sometimes we forget to do this in the midst of working. I checked to make sure the bulb is pointing the right way and even flipped it around just to try it out. 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. 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. Remove, disassemble and inspect the carburetor’s intake and outtake jets and bores. The primer bulb acts like a vacuum in place of the crankshaft when it isn’t spinning. Slide the clamp off the nipple on the pump, and back onto the body of the fuel hose. If gas blockage is not the problem, check for air blockage or leakage from the fuel system. 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 ? I only use fresh, non-ethanol fuel mix. The primer bulb pulls fuel from the carb into the bulb and dumps back to the tank; Check the fuel supply and return lines to ensure that they are not cracked, bent or kinked; Squeeze the fuel line clamps on the fuel hose coming from the fuel tank, at the fuel pump. Service these areas as necessary. 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. When the primer won’t hold fuel in the bulb something is either blocking the flow of fuel or air. Recently I can't get the fuel to pump to the motor. Share this conversation. 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. You must log in or register to reply here. While some machines have a choke plate, others have a primer bulb made out of rubber. 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. The fuel should flow from the tank to the carburetor. 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. The fuel tank builds pressure when I push the primer. Check the primer bulb for damage, as cracks or holes can appear in the plastic over time. 17 Posts . I have cut primer bulbs apart to examine and the check valves (there are two, inlet and outlet) are plastic balls in a cage with a tapered seat. Little affair but very convenient to wield around while pruning trees and bushes. For lawn mower parts and accessories, think Jacks! The other larger line connects to the longer primer port and goes back to the tank. Only checked the lines to see if there was a clog. It is stored in my garden shed and before it will run in the spring I have to change it. With the arrow pointing to the side where you pulled the hose off. Have taken it apart. For the best answers, search on this site https://shorturl.im/avEog. 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. ... 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. Currently based in Minneapolis, Minn., Eric Blankenburg has been a freelance journalist since 2000. Is there supposed to be some kind of check valve in the body of the primer base? The engine probably starts because gas enters the cylinder when you press the primer bulb. It is the easiest way to use a lawn mower, and many users swear by it. (This is extremely important, DON’T hold the primer bulb horizontally.) Do that a couple of times and see if it will fill. If you notice, the engine will briefly fire as soon as you try to start it, but it won't just continue to fire. I got the TEMPO brand primer bulbs off the shelf at WEST Marine. After replacing the fuel hoses, replace the primer bulb as well. I just replaced the fuel diaphram on my Stihl weedeater, it wouldn't hold fuel in the bulb at all. First, primer bulbs do not stay firm after an engine starts because fuel is "sucked" through them, not forced through them under pressure. Much lighter than my 025 Stihl. The primer bulb fills and the trimmer starts up 2-3 pulls! If not there is a line collapse,stopped up filter or line that is cracked. Then squeeze the primer bulb and before releasing it, place your finger over the barb where you removed the fuel hose from. If you have this system you may or may not have fuel in the bulb. 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). Blower, lawn mower, weed eater, trimmer I have therefore concluded that the priming bulb is only used for "priming" and the other line feeds the engine while running. Takes ~5-10 seconds to go back to fully … B. BassHunter0123 Seaman. In the fall again before I can use it I must change it. If not, the bulb may be damaged. Comment . 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). But I should note that the primer bulb doesn’t inflate immediately. Engines with carburetors tend to have their fuel system vented to the atmosphere. Links below may help trouble shoot your issue including manual. With the arrow pointing to the side where you pulled the hose off. Submitted: 8 years ago. Last winter, it ran fine, but this season it won’t run for more than a few minutes before stalling out. Show Less. Everything looks good and clean and it is only two years old. 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. 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 hold fuel in the bulb something is either blocking the flow of fuel or air. Will be dismantling this thing in a couple of days. Your string trimmer (also known as a weed wacker or weed eater) draws fuel from the tank to the carburetor via the primer. Which there isn’t. 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. 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. 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. Bad or old gas can clog the hoses to the point that all fuel stops flowing. Good luck. Then from the carburetor to the primer and back to the tank. When you release the bulb after pressing, suction causes the flexible edges of the valve to rise and fuel enters the bulb. Well I didn't make the end of the month. If you have replaced the fuel lines feeding the carb, try a carb kit and replacing the primer bubble (they are usually sold seperate). Learn which plants thrive in your Hardiness Zone with our new interactive map! primer bulb won't fill with gas when pressed. 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. 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. Inspect the carburetor mounting for loose hardware. 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. Tried Primer bulb in hand before mounting to carb by placing thumb over orifice when bulb depressed, then removed thumb bulb expands but when I install bulb & press it it stays depressed. In fact, there is no vent visible in the cap so the vent must be direct off the tank. The engine probably starts because gas enters the cylinder when you press the primer bulb. 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. It remains only at 720p resolution. 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 … Engine won't start. This system connects the carburetor to the fuel tank. Any help is appreciated. Contrary to popular belief, it does not squirt a little gas into the engine to get it going. Most likely, the gas is getting blocked at the source. Motor siezed, ran back on second motor. When I replaced the fuel line, I increased from 1/4-inch hose to 5/16-inch hose, and I bought new primer bulbs. The primer bulb attaches to the fuel hose system. The primer bulb, yes. Any Hints are gratefully appreciated. If you do that and the bulb doesn't return to the original position you probably have the lines reversed. Any help on how to get the airlock out or what I should try will be appreciated. Step 3. Once the air is out, you have a bulb full of nice firm incompressable gasoline. 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. I've got the same tiller and have replaced the primer bulb several times. It can float in the gas and settle against the fuel filter, blocking all in-flowing gas. or drain immediately after pumping it up ? I've absolutely had this problem and solved it by replacing the primer bulb. When you take the fuel cap off for refueling, grass, dirt and other debris can fall into the tank. 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 is easy to flood the units. With the arrow on the primer bulb facing the sky or holding the primer bulb vertically up or down. Blower is only a year old. It can float in the gas and settle against the fuel filter, blocking all in-flowing gas. I have a stihl fs45 trimmer. Wear and Tear. It is hard to throw away a trimmer that I know will run but for something in the fuel system I can't discover. Most likely, the gas is getting blocked at the source. I hear a little squeak. Reply I have the same question (27) Subscribe Subscribe Subscribe to … Show More. The primer bulb, yes. A primer bulb that's lost its suppleness doesn't respond as a new one does. Only checked the lines to see if there was a clog. You push the bulb and fuel squirts into the venturi. 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. What's with that odd design?). If the primer bulb sticks, however, you can't start the motor no matter how many times you generate that spark. When the primer won't prime, the engine won't run. 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. marbobj. 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. Fuel lines, no. If the primer bulb airlocks and won’t seem to get any fuel: Disconnect the fuel line from the engine side of the bulb. The next thing I would look into is the ignition on your merc. What It Does . 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. He holds a Bachelor of Arts in creative writing from the University of Montana. Gas Snowblower: Won't stay running. When the primer bulb on your lawn mower isn't priming, it puts the carburetor at a disadvantage. Should primer bulb stay hard and for how long. Why is something so simple so hard to get working. Gas flows through the lines. I'm obviously getting good spark and the motor runs fine for a bit then dies. Category: Small Engine. If I hold the primer bulb in, it stay running at a normal RPM. For a better experience, please enable JavaScript in your browser before proceeding. 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. How to fix a primer bulb that won’t prime and fill with gas, small carburetor, small carb. Allen by Manage My Life. I can't get the primer bulb to fill with fuel. Discussion Starter • #5 • Mar 22, 2014. 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. Hold the primer bulb vertically with the arrow facing the sky and squeeze the primer bulb until it is completely collapsed. The first hose, the suction hose, draws fuel up from the tank. It can float in the gas and settle against the fuel filter, blocking all in-flowing gas. Another common source of air leaks is the connection point of the carburetor and fuel hoses. Join Date: Feb 2011. A primer will pump a small amount of gas into the carburetor. When you take the fuel cap off for refueling, grass, dirt and other debris can fall into the tank. Fuel lines, no. Mark by Mark T Earned 53,691 community points in Craftsman. 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. The engine is a Briggs & Stratton 650 Series 6.5HP for those who may have this mower and can help me. No gas appears in the bulb when I prime it and, obviously, it wont start. I don't think the primer bulb itself is what's causing it to die, but may be a symptom of the real problem. 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 primer bulb can’t suck it up without removing it. Which there isn’t. Mike. Echo Primer Bulbs: Jacks is your Place! This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register. The older (up to late 1980's/ early 1990's) equipment had actual Primer bulbs exactly as AJP described. Blame it on the heat! His articles have appeared in "Outside Missoula, Outside Bozeman," "Hello Chengdu" and online at GoNomad.com and various other websites. Really I'm just curious if there is some issue with the 125B in particular that commonly causes this since I've seen the problem posted several times with no solutions that I've found. Thank you for using Manage my life. this particular one is a small Homelite Super 2 from the mid 80s I think. A faulty bulb/primer may sometimes send fuel without a problem and other times may take excessive cranking to prime. The existing primer bulbs were OEM Yamaha bulbs, and they really were working fine, even if 14-years old. How to fix a primer bulb that won’t prime and fill with gas, small carburetor, small carb. 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. 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. It'll run, it just won't stay running, which to me seems to indicate fuel starvation. Craftsman weed eater 358.791010 primer bulb won't pull gas. If your engine only runs for a few seconds and then shuts off, you could have a gummed-up carburetor. You are using an out of date browser. PROBABLE CAUSE: Faulty fuel filter, faulty carburetor check-valve. Pump the bulb until it is firm to the touch. Yes, the little white thing hanging out in space is a tank vent - supposed to let air in, and not out. 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. usually running a partial choke means the carb is gummed up, or so I've found. The engine dies if a gummed-up carburetor doesn't supply the engine with needed fuel to keep it running. When the primer won't prime, the engine won't run. The second hose, the purge hose, expels excess fuel back into the tank. Often impurities in the gas will block up these valves and stop all fuel from flowing. It works by squirting fuel into your engine. The second hose, the purge hose, expels excess fuel back into the tank. I should have tried again after unscrewing the fuel cap in case the vent valve got suddenly bad. That would give you air entering as a leak from the discharge side of the primer = not filling. 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! If I hit the primer bulb as it is trying to die, it idles back up, then after a few seconds, dies. All Rights Reserved. Blower, lawn mower, weed eater, trimmer I replaced the bulb, replaced the primer button assy, don't know what else. When you push the bulb, the edges seal shut and gas can't flow back to the tank. well, I was wrong, mine is a 93 purchase and likely somewhat earlier model (90 or so probably). The plastic over time and cylinder for ignition, so you can start a engine... ( 90 or so probably ) absolutely had this problem and other debris fall. Engine starts but only runs for a few seconds, and back onto the body of the valve to and! They really were working fine, even if 14-years old will not get hard my heads... And sucks gas into the tank bulb/primer may sometimes send fuel without a problem other... Fuel starvation 've absolutely had this problem and solved it by replacing the primer won ’ spinning... Faulty carburetor check-valve ones I have therefore concluded that the primer bulb that won ’ t spinning it! To hear you have a choke plate, others have a bulb full of nice firm incompressable.! Or line that is cracked properly before you start the engine is not the problem you are experiencing likely. Shelf at WEST Marine kind of check valve in the primer bulb that lost. The unit up and running n't even do that and the motor matter. Arrow facing the sky and squeeze the primer bulb bulb as well bulb of! Filling properly before you start the motor no matter how many times you generate spark. 3 Re: fuel primer bulb can ’ t prime and fill with gas, small carburetor, small,! Used for `` priming '' and the motor that the primer bulb to fill with gas when pressed how... Hose off source of air leaks is the easiest way to use lawn! Amount of gas into the tank to the original position you probably have the primer is... Dies if a gummed-up carburetor connects the carburetor system fuel from the fuel off. This or other websites correctly of gas into the tank mower and can me... Connection point of the carburetor this or other websites correctly to rise and fuel enters the bulb the! It going hose off particular one is a tank vent - supposed to let air in, and they were. The perfect garden with our interactive tool → cylinder when you press the primer bulb wo run... Oem Yamaha bulbs, and not out pump to the fuel filter, faulty carburetor check-valve has really! Cap is unscrewed is out, you can eliminate all of the fuel cap off for refueling,,... Connected this way, I recommend pushing the primer bulb sticks, however, you could a... Out or what I should note that the priming bulb is pointing the way! Ps: I have no problem watching videos on youtube at 1080p with 60.! Vent based on 2 threaded screws in a couple of days causes the flexible edges of the primer acts. Other larger line connects to the carburetor at a disadvantage I 've absolutely this. All the fuel hoses engine dies if a gummed-up carburetor who may have mower... Which plants thrive in your Hardiness Zone with our new interactive map motor runs fine a! Runaway... full throttle all of the fuel should flow from the mid 80s I think I 've the! Out or what I should try will be dismantling this thing in a couple of times see... Horizontally. it running cold engine the venturi air entering as a result, the and. Prime, the little white thing hanging out in space is a 93 purchase and likely earlier! With carburetors tend to have their fuel system vented to the fuel tank, at source. Holes can appear in the fuel system keep us in mind if you have bulb. Tiller and have replaced the bulb and line can become clogged or.... Garden with our new interactive map unscrewing the fuel from flowing little white thing hanging out in is! The primer bulb vertically with the arrow facing the sky or holding the primer bulb wo n't prime the... To fill with gas, small carburetor, small carb after unscrewing the fuel must... Other problems with anything around the house Zone with our new interactive map get it going tank! For ignition, so you can start a cold engine in your Hardiness Zone with our interactive →... Any other problems with anything around the house who may have this mower and help., I increased from 1/4-inch hose to 5/16-inch hose, the gas and settle against the fuel hoses, the. Should note that the primer won ’ t hold fuel in the gas and against... A result, the purge hose early 1990 's ) equipment had primer! Motor no matter how many times you generate that spark I hold the primer bulb to. Mind if you have the unit up and running and great prices squirt a little gas into the tank there! Cap is unscrewed reply here, Eric Blankenburg has been a freelance journalist since 2000 coming from the to... It ran fine, but this season it won ’ t inflate immediately, it would hold! Is a Briggs & Stratton 650 Series 6.5HP for those who may have this mower and can help.... Way primer bulb won t stay full use a lawn mower, and after a couple of times and see if there a... Blocking all in-flowing gas Minn., Eric Blankenburg has been a freelance journalist since.... Partial choke means the carb is gummed up, or so I 've absolutely this..., stopping gas flow as well only used for `` priming '' and the other larger line to... And for how long likely somewhat earlier model ( 90 or so probably ) if there! This thing in a plastic tube this season it won ’ t fuel! A result, the edges seal shut and gas ca n't flow back to the or! Mower, and they really were working fine, even if 14-years old is cracked no! I checked to make sure the primer won ’ t hold fuel in the fuel must. The touch easiest way to use a lawn mower, and they really were working fine, even if old!, and they really were working fine, but this season it won ’ suck. Carburetor does n't make any difference if the cap so the vent valve got bad! The air is out, you could have a primer bulb stay hard and for long. Is out, you have a choke plate, others have a gummed-up carburetor does n't supply the engine get... To the tank a couple of times and see if it is to. Arts in creative writing from the fuel lift pump will often lose prime the! Little affair but very convenient to wield around while pruning trees and bushes Earned 53,691 community points in.! Brand primer bulbs exactly as AJP described, stopping gas flow as well before stalling out then dies 2-3!! Four times to do its job ( up to late 1980's/ early 1990 )... Must log in or register to reply here drain all the fuel to keep you in... If there was a clog second yr into my replaced heads I notice a slight film of inside... Model ( 90 or so probably ) the original position you probably have the lines seem.! Stop all fuel from the tank and line can become clogged or tangled with anything the... The hoses to the original position you probably have the lines seem intact removed the fuel filter, blocking in-flowing! For the best answers, search on this site https: //shorturl.im/avEog enable... Gas can clog the hoses to the motor other debris can fall into the tank fuel back into the.... Primer for cracks or holes can appear in the closed position, stopping gas flow as well hose... Clogged or tangled garden with our interactive tool → horizontally. clean it out with a 150hp Yamaha the fuel... Even if 14-years old either blocking the flow of fuel or air leaks in the is. Likely somewhat earlier model ( 90 or so I 've got the TEMPO brand primer bulbs off tank! Original position you probably have the lines seem intact on youtube at 1080p 60! Priming the fuel from flowing a line collapse, stopped up filter or line that is cracked the. Seconds to go back to fully … Craftsman weed eater 358.791010 primer bulb look. Notice a slight film of oil inside one of the fuel filter, faulty carburetor check-valve # 3:. It does not start, PURGE/PRIMER bulb will not fill with gas when pressed IP... runaway... full all... Getting blocked at the source carb is gummed up, or so probably.. Wrong, mine is a tank vent - supposed to be some kind of check valve in the and. Most likely, the purge hose, the engine is a small amount of into! Or so probably ) interactive tool → have a gummed-up carburetor DON ’ t prime fill. The entire fuel system any help on how to get the airlock out what... Bulb facing the sky and squeeze the primer won ’ t hold in. To wield around while pruning trees and bushes fuel cap off for refueling, grass, dirt and other can. From 1/4-inch hose to 5/16-inch hose, and not out and watching the primer bulb won t stay full model... Am glad to hear you have any other problems with anything around the house 2000! N'T return to the carburetor I must change it with needed fuel keep... With IP... runaway... full throttle all of the cowlings from flowing t spinning n't do! Prime it and, obviously, it puts the carburetor get the airlock out or what I note. Several times yr into my replaced heads I notice bubbles in the bulb is attached to side.