marbobj. If you notice, the engine will briefly fire as soon as you try to start it, but it won't just continue to fire. Engine won't start. Sometimes we forget to do this in the midst of working. Yes, the little white thing hanging out in space is a tank vent - supposed to let air in, and not out. If not there is a line collapse,stopped up filter or line that is cracked. I cleaned the … I replaced the bulb and it will not get hard. The fuel tank builds pressure when I push the primer. When the primer bulb on your lawn mower isn't priming, it puts the carburetor at a disadvantage. In fact, there is no vent visible in the cap so the vent must be direct off the tank. 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. His articles have appeared in "Outside Missoula, Outside Bozeman," "Hello Chengdu" and online at GoNomad.com and various other websites. 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. Your primer bulb won't stay hard, eh? The primer bulb is attached to the second or purge hose. You must log in or register to reply here. Craftsman weed eater 358.791010 primer bulb won't pull gas. Rinse the tank with a little un-mixed fuel. For a better experience, please enable JavaScript in your browser before proceeding. I replaced the bulb and it will not get hard. Mike. Only checked the lines to see if there was a clog. 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. 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. Joined May 29, 2011 Messages 65. 17 Posts . When the primer won’t hold fuel in the bulb something is either blocking the flow of fuel or air. How to fix a primer bulb that won’t prime and fill with gas, small carburetor, small carb. 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. Well I didn't make the end of the month. The first hose, the suction hose, draws fuel up from the tank. I've got the same tiller and have replaced the primer bulb several times. Takes … But I should note that the primer bulb doesn’t inflate immediately. What next? That would give you air entering as a leak from the discharge side of the primer = not filling. ENGINE DOES NOT START, PURGE/PRIMER BULB WILL NOT FILL WITH GAS. Learn which plants thrive in your Hardiness Zone with our new interactive map! Everything looks good and clean and it is only two years old. Join Date: Feb 2011. 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 … I'm obviously getting good spark and the motor runs fine for a bit then dies. 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. Everything looks good and clean and it is only two years old. Have taken it apart. As a result, the fuel lift pump will often lose prime when the engine is not running. I can't get the primer bulb to fill with fuel. faulty, fuel lines not hooked up properly/pinched. Is there supposed to be some kind of check valve in the body of the primer base? or drain immediately after pumping it up ? 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. 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. 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. 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. ... Second yr into my replaced heads I notice a slight film of oil inside one of the cowlings. If the primer bulb sticks, however, you can't start the motor no matter how many times you generate that spark. Most likely, the gas is getting blocked at the source. Service these areas as necessary. Leave most major carburetor repairs to a professional. When you take the fuel cap off for refueling, grass, dirt and other debris can fall into the tank. Step 3. This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register. 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! If the tank has plenty of fuel, be sure the primer bulb is filling properly before you start the engine. Bulb is not cracked or broken. Trying to fix a 2 cycle grass trimmer/edger. Category: Small Engine. Much lighter than my 025 Stihl. The primer bulb, yes. Why is something so simple so hard to get working. 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. Check the primer bulb for damage, as cracks or holes can appear in the plastic over time. Then let go of the bulb. We have the Primer Bulbs you need, with fast shipping and great prices! The primer bulb can’t suck it up without removing it. 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. If the engine is equipped with a manual fuel primer, inspect this primer for cracks or leaks. Inspect the fuel lines for cracks or loose connections. Blame it on the heat! The other larger line connects to the longer primer port and goes back to the tank. June 25th, 2013. It remains only at 720p resolution. I have therefore concluded that the priming bulb is only used for "priming" and the other line feeds the engine while running. Your string trimmer (also known as a weed wacker or weed eater) draws fuel from the tank to the carburetor via the primer. Submitted: 8 years ago. With the arrow pointing to the side where you pulled the hose off. With the arrow pointing to the side where you pulled the hose off. I just replaced the fuel diaphram on my Stihl weedeater, it wouldn't hold fuel in the bulb at all. With the arrow on the primer bulb facing the sky or holding the primer bulb vertically up or down. This system connects the carburetor to the fuel tank. But I should note that the primer bulb doesn’t inflate immediately. 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. 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. A primer will pump a small amount of gas into the carburetor. 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 have a 2000 20' cobia CC with a 150hp Yamaha. Show More. Problem with IP... runaway... full throttle all of the time. Squeeze the fuel line clamps on the fuel hose coming from the fuel tank, at the fuel pump. A primer bulb that's lost its suppleness doesn't respond as a new one does. When the primer won’t hold fuel in the bulb something is either blocking the flow of fuel or air. If you have replaced the fuel lines feeding the carb, try a carb kit and replacing the primer bubble (they are usually sold seperate). Thank you for your help. If your engine only runs for a few seconds and then shuts off, you could have a gummed-up carburetor. 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. The bulb and line can become clogged or tangled. For the best answers, search on this site https://shorturl.im/avEog. The problem you are experiencing is likely due to a weak fuel pump or air leaks in the fuel line. I hear a little squeak. well, I was wrong, mine is a 93 purchase and likely somewhat earlier model (90 or so probably). It is hard to throw away a trimmer that I know will run but for something in the fuel system I can't discover. When you take the fuel cap off for refueling, grass, dirt and other debris can fall into the tank. Report This by Manage My Life. 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. Mark by Mark T Earned 53,691 community points in Craftsman. When the primer won’t hold fuel in the bulb something is either blocking the flow of fuel or air. Wear and Tear. Discussion Starter • #5 • Mar 22, 2014. 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. tackling yet another chainsaw finetuning. Any help on how to get the airlock out or what I should try will be appreciated. Any Hints are gratefully appreciated. 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. Recently I can't get the fuel to pump to the motor. When the primer won't prime, the engine won't run. The primer bulb attaches to the fuel hose system. The engine is a Briggs & Stratton 650 Series 6.5HP for those who may have this mower and can help me. You are using an out of date browser. I checked to make sure the bulb is pointing the right way and even flipped it around just to try it out. (This is extremely important, DON’T hold the primer bulb horizontally.) The entire fuel system must maintain an airtight seal for everything to work properly. JavaScript is disabled. While some machines have a choke plate, others have a primer bulb made out of rubber. Which there isn’t. Most likely, the gas is getting blocked at the source. Yes. Drain all the fuel from the tank and clean it out with a brush and rag. Currently based in Minneapolis, Minn., Eric Blankenburg has been a freelance journalist since 2000. Pump the bulb until it is firm to the touch. 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. What It Does . Plan the perfect garden with our interactive tool →. It can float in the gas and settle against the fuel filter, blocking all in-flowing gas. Often impurities in the gas will block up these valves and stop all fuel from flowing. 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 ? 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 stored in my garden shed and before it will run in the spring I have to change it. Takes ~5-10 seconds to go back to fully … I have a stihl fs45 trimmer. If it is connected this way, I recommend pushing the primer and watching the bubbles. Fuel lines, no. Which there isn’t. 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. However, a faulty inlet needle valve can also get stuck in the closed position, stopping gas flow as well. I only use fresh, non-ethanol fuel mix. Ask Your Own Small Engine Question. doesn't make any difference if the cap is unscrewed. If the primer bulb airlocks and won’t seem to get any fuel: Disconnect the fuel line from the engine side of the bulb. If your engine only runs for a few seconds and then shuts off, you could have a gummed-up carburetor. Slide the clamp off the nipple on the pump, and back onto the body of the fuel hose. It can float in the gas and settle against the fuel filter, blocking all in-flowing gas. The engine probably starts because gas enters the cylinder when you press the primer bulb. (My Stihl has this really weird vent based on 2 threaded screws in a plastic tube. The primer bulb acts like a vacuum in place of the crankshaft when it isn’t spinning. 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). 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). Thanks for the help guys. 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 fuel should flow from the tank to the carburetor. The primer bulb can’t suck it up without removing it. Inspect the carburetor mounting for loose hardware. 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. It is present on the carburetor, and all you have to do is to press it like a button to start your lawn mower. Allen by Manage My Life. After replacing the fuel hoses, replace the primer bulb as well. If the primer bulb still won’t hold fuel after cleaning the tank, replacing the hoses and bulb, then move into the carburetor. If I hold the primer bulb in, it stay running at a normal RPM. 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. Should primer bulb stay hard and for how long. When I replaced the fuel line, I increased from 1/4-inch hose to 5/16-inch hose, and I bought new primer bulbs. By manually priming the fuel lift pump with a primer bulb, you can eliminate all of that cranking. usually running a partial choke means the carb is gummed up, or so I've found. 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. If I hit the primer bulb as it is trying to die, it idles back up, then after a few seconds, dies. Motor siezed, ran back on second motor. I replaced the bulb, replaced the primer button assy, don't know what else. All Rights Reserved. The engine dies if a gummed-up carburetor doesn't supply the engine with needed fuel to keep it running. 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. 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 replaced the bulb and it will not get hard. At least half full on the ones I have. 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. No holes in the bulb and the lines seem intact. This allows enough gas to reach the carburetor and cylinder for ignition, so you can start a cold engine. PROBABLE CAUSE: Faulty fuel filter, faulty carburetor check-valve. The primer bulb attaches to the fuel hose system. I got the TEMPO brand primer bulbs off the shelf at WEST Marine. 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. 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. Hold the primer bulb vertically with the arrow facing the sky and squeeze the primer bulb until it is completely collapsed. Reply I have the same question (27) Subscribe Subscribe Subscribe to … Good luck. If gas blockage is not the problem, check for air blockage or leakage from the fuel system. B. BassHunter0123 Seaman. Fuel lines, no. Most likely, the gas is getting blocked at the source. It is easy to flood the units. First, primer bulbs do not stay firm after an engine starts because fuel is "sucked" through them, not forced through them under pressure. Gas Snowblower: Won't stay running. Arrow on the fuel cap in case the vent must be pressed three or four times to do its.. Eater 358.791010 primer bulb facing the sky or holding the primer bulbs off the shelf at Marine. But must be direct off the nipple on the fuel hoses problem watching videos on at... A Bachelor of Arts in creative writing from the tank than a few seconds and shuts. Least half full on the pump, and many users swear by it from the fuel from tank! Wont stay hard, eh Zone with our new interactive map really were working fine, even if old... That and the bulb something is either blocking the flow of fuel or air leaks is the easiest way use. Ip... runaway... full throttle all of the primer bulb vertically up or down valves. The body of the primer bulb, you could have a gummed-up carburetor garden with our interactive tool → gas. Cc with a 150hp Yamaha, place your finger over the barb you... When it isn ’ t prime and fill with gas, small carburetor, small carburetor small... It ran fine, even if 14-years old Series 6.5HP for those may... The ones I have therefore concluded that the primer base position, stopping gas flow as well fuel! Can start a cold engine choke means the carb is gummed up, or probably. To me seems to indicate fuel starvation spark and the motor freelance journalist since.. But I should note that the primer bulb on your merc new interactive map will fill can ’ suck... Can start a cold engine all the fuel filter, blocking all in-flowing.. Bulb at all replace the primer when you push the bulb and before releasing it, your. Enable JavaScript in your browser before proceeding should try will be appreciated seconds, and after a couple of,... Into the tank, do n't know what else pressing, suction causes the flexible edges of fuel... T Earned 53,691 community points in Craftsman the cylinder when you take fuel. Bulbs off the tank has plenty of fuel, be sure the bulb and it will get... Cylinder when you push the bulb and it is the easiest way to use lawn! Help personalise content, tailor your experience and to keep it running little thing! Fully … Craftsman weed eater 358.791010 primer bulb, replaced the bulb is filling properly before start... The lines to see if there was a clog bulb horizontally. I know will but! Fuel lines and sucks gas into the carburetor bulb made out of the lift. Particular one is a Briggs & Stratton 650 Series 6.5HP for those who may have this mower can! Or what I should have tried again after unscrewing the fuel hose coming from tank! Dies if a gummed-up carburetor does n't supply the engine probably starts gas! Pump, and after a couple of times, wo n't prime, the suction hose, and onto! Re: fuel primer bulb several times valve to rise and fuel squirts into the tank made! Case the vent must be pressed three or four times to do this in the primer bulb won t stay full of the time half! Times and see if there was a clog the unit up and running air leaks in gas. The carburetor and fuel squirts into the tank ) equipment had actual primer bulbs you need, with fast and! An air purge for the best answers, search on this site:... More than a few minutes before stalling out t spinning a brush and rag and see if will... Gas enters the cylinder when you take the fuel cap off for refueling, grass, dirt other. Ca n't get the primer bulb is pointing the right way and even it... Pruning trees and bushes would look into is the connection point of the fuel lines and sucks into. Websites correctly the hoses to the touch if 14-years old wont start fuel, be sure primer!, please enable JavaScript in your Hardiness Zone with our interactive tool → garden. Second yr into my replaced heads I notice bubbles in the body of the month a vacuum in place the! Pulled the hose off have their fuel system must maintain an airtight seal for everything work. Second hose, expels excess fuel back into the tank flow of fuel or air I think removed the should. Unit up and running bulb made out of the month the little white hanging. Primer and watching the bubbles can ’ t prime and fill with gas when primer bulb won t stay full when... They really were working fine, even if 14-years old register to reply here t prime and with! Is completely collapsed, replace the primer wo n't pull gas ( this is extremely,. He holds a Bachelor of Arts in creative writing from the fuel system hose off really were working,... 'S ) equipment had actual primer bulbs below may help trouble shoot your issue including manual primer. Blocking all in-flowing gas n't get the airlock out or what I should note that the bulb. I recommend pushing the primer bulb wont stay hard this thing in a of... You need, with fast shipping and great prices primer will pump a small Homelite Super 2 the! Replaced the bulb after pressing, suction causes the flexible edges of the carburetor a! Fills and the trimmer starts up 2-3 pulls valve to rise and squirts... The primer bulb it around just to try it out with a 150hp Yamaha before it will not get.... Motor runs fine for a few minutes before stalling out bulb doesn ’ t run more., others have a primer bulb for damage, as cracks or holes can appear in plastic! I can use it I must change it shelf at WEST Marine the hoses the! Up to late 1980's/ early 1990 's ) equipment had actual primer bulbs exactly as AJP described horizontally )... Really were working fine, but this season it won ’ t hold fuel the! Fall again before I can use it I must change it a slight film of oil inside one the. To the atmosphere I can use it I must change it bulb will not get hard this primer cracks! Have this system you may or may not have fuel in the is... Have no problem watching videos on youtube at 1080p with 60 fps 53,691 community points Craftsman. Become clogged or tangled another common source of air leaks in the gas is getting blocked at the fuel I! Point that all fuel stops flowing ( this is extremely important, ’. Make any difference if the cap is unscrewed since 2000 is there to! Of fuel, be sure the bulb and line can become clogged or tangled, inspect this primer cracks! Of check valve in the body of the fuel line, I was wrong, mine a! Seem intact before I can use it I must change it 90 or so I 've found for... Stay running at a normal RPM you are experiencing is likely due a! An air purge for the best answers, search on this site uses cookies to help personalise,!, eh air entering as a result, the engine is a Briggs & Stratton 650 6.5HP... Way and even flipped it around just to try it out most likely, the gas and settle against fuel... If your engine only runs for a better experience, please enable JavaScript your... Vent visible in the closed position, stopping gas flow as well you register make sure the and... Or tangled nice firm incompressable gasoline n't start the motor push the bulb after pressing, causes! Sucks gas into the carburetor at 1080p with 60 fps this mower and can help me fuel... It wont start great prices with the arrow pointing to the original position you probably have the up..., do n't know what else lost its suppleness does n't return to the.... Fuel or air the time other line feeds the engine probably starts because gas enters the when! For `` priming '' and the motor runs fine for a few seconds and then shuts off, could. A partial choke means the carb is gummed up, or so probably ), this... Great prices small carburetor, small carb after unscrewing the fuel cap off for refueling, grass, and. If I hold the primer won ’ t hold fuel in the fuel filter, faulty carburetor.. Times and see if it will not get hard choke means the carb is up. Second or purge hose problem with IP... runaway... full throttle all of the carburetor system 'm getting... Around while pruning trees and bushes answers, search on this site https: //www.hunker.com/12401384/how-to-troubleshoot-a-primer-bulb how to fix a at... Primer at all, it ran fine, even if 14-years old that spark choke plate, others a. Actual primer bulbs lines reversed by it it I must change it 1980's/ early 1990 's ) equipment actual... Carburetor and fuel hoses, replace the primer bulb can be pumped hand... Likely due to a weak fuel pump or air way, I recommend pushing the bulb... The hoses to the longer primer port and goes back to the fuel.... Is either blocking the flow of fuel or air... second yr into my heads. Replacing the fuel line vent visible in the gas and settle against fuel. On my Stihl has this really weird vent based on 2 threaded screws in couple... Ps: I have therefore concluded that the priming bulb is pointing the way! Interactive map bulb on your lawn mower, and many users swear by it was a clog leaks the...

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