Lawn mower engines can be simple or sophisticated, but they all must have a starting sequence to get them going. 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. Most small engines will not start if the carburetor is dry. The day after i went to use it again and noticed when i primed it, the bulb would not fill up with fuel, only a little bit and just small bubbles. How To Prime Up Fuel When Primer Bulb is Air Locked If the primer bulb is held horizontally. I would imagine that's why the primer doesn't work, but the part # 531009621 shows that it's no longer available. The primer on your machine is one of two types: push bulb or automatic. These hoses and the bulb itself tend to get loose over time, and any bad connection will also cause the primer bulb to stop filling. Then from the carburetor to the primer and back to the tank. Installed it fits loads better no leaks ect which was a good sign. If the bulb feels soft at all, it's definitely bad. Several priming strokes -- always consult your lawn mower's owner's manual for the approximate number -- should draw enough fuel to catch when the spark plug fires. Well it either primed by hand, has a manual choke or auto choke. Posted by 3 days ago. The vacuum can't work if the rubber bulb is cracked or torn, or if its seal is compromised, say, by old, stiff material. At first I thought it was just the face the the seal between the casn and the primer bulb unit/ air filter box was the issue. Holding the primer bulb vertically is the proper way to use the primer bulb and ensures that if there is fuel close, it will suck it up. I have a second working BG55 and switched the entire carburetor. However, in some unfortunate cases, the primer bulb gets damaged or stops working. Your string trimmer (also known as a weed wacker or weed eater) draws fuel from the tank to the carburetor via the primer. Then most of the time, it will not prime anything at all! 5 comments. I tried dissembling the carb. snow blower won't prime, Doesn't start. It starts with starting fluid but won't stay running. You can typically feel or hear the rush of air and gas when hand priming. The better news is that you can employ alternative methods to start your mower! Primers push air into the carburetor, forcing it to mix with fuel and move into the piston cylinder. Hello. New to the forum. Blower, lawn mower, weed eater, trimmer The good news is that you don’t have to panic or run to buy a new lawn mower. Don't know much about small engines. Each type of primer uses a slightly different process to accomplish its end. Spraying carburetor cleaner directly into the carburetor can also help re-prime the automatic primer. The primer on your machine is one of two types: push bulb or automatic. Long Term Most seasoned boaters replace the primer squeeze bulb and hose assembly once every two years, and keep the last used one for a good spare. 12 questions containing the word/s 'primer bulb wont prime' were found. My BG55 won't prime when I press the priming bulb. How to fix a primer bulb that won’t prime and fill with gas, small carburetor, small carb. I took the bulb off and found that the check valve rubber has deteriorated, and has some holes in it. Where Is the Primer on a Lawn-Boy Silver Series 4.5 HP Lawn Mower? The push bulb primer sits on the outside of the carburetor and the automatic primer works from within it. Oh by the way, I noticed aswell (for some strange reason) when i loosend the right screw which holds the primer bulb in the fuel came into the bulb really fast but when primed it was leaking also sometimes when the bulb was pressed it didnt come back up (until i loosend that screw). 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. save. A retired municipal judgem Reynolds holds a degree in communications from Northern Illinois University. @daniberry. share. The very small passages in the carb may need to be cleaned out with a small wire. If the primer bulb has not been replaced, you may have plugged check valves inside even if the bulb still feels nice and springy. Both types compensate for the lack of the stroke that draws fuel into the combustion chamber as the result of the vacuum created during normal operation. hide. Refitted the carb, still no luck. I check the tube from the air box to a metal tube. A primer bulb that's lost its suppleness doesn't respond as a new one does. © Copyright 2020 Hearst Communications, Inc. I have a Briggs and Stratton 5hp Push Mower. is this a cracked primer bulb? It worked fine for a while. How Does a Ryobi 700R Gas/Fuel Primer Bulb Work? Fitted it all but still had the same problem. i received the new fuel line today, 2mm i/d, 5mm o/d. Get shopping advice from experts, friends and the community! If this doesn't take care of it, then it's time for a carburetor cleaning and re-build. How does a primer bulb work? If the hose is dirty or cracked, fuel will start leaking out somewhere else in the fuel system. I believe the mower is about five years old. I have tried everything and just cannot get to the bottom of this hope somebody can help me . It will no longer prime. report. When the primer won't prime, the engine won't run. Start with disconnecting the priming line from the carburetor and hold near your ear and push the priming bulb. Works fine … I recently purchased a used Echo PB 610 backpack blower. The other larger line connects to the longer primer port and goes back to the tank. There could be a few problems. There’s a lot of air in the bulb. Snow thrower primer bulb temporary fix using a turkey baster. The primer bulb not popping back up when priming indicates that a passage in the carb body is still plugged, despite your cleaning job. just to clarify, if the strimmer "ticks" over or "idles" ok, by that i mean it doesnt sound like it struggling, starving for fuel ect...or it doesn't sound like its revving to much it litreally ticks over until i stop it. The existing primer bulbs were OEM Yamaha bulbs, and they really were working fine, even if 14-years old. I have the same problem when the bulb is pressed it pumps air and does not suck the fuel up, Yes Matt sounds like the exhaust muffler take it off and take the gauss filter out clean with petrol and leave filter out put it back on see how it goes it should now rev up with no problem, 07/13/2019 by I am suspecting its the carbs diaphragm but dont see nothing too bad with it. It will not prime I have no idea why. if i turn it off and turn it back on it seems to run fine. Her six children and stepchildren served as subjects of editorials during her tenure as a local newspaper editor. One way or the other, we should get gas into the bulb. 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). Dust, dirt and even particles of rust can get into the fuel filter, the air filter or the apertures through which the gas and air travel to get to the carburetor. But there's another problem.............after priming 3x/4x times as stated, i put the choke on the lowest one pulled 2/3 times it fires up then cuts out..so i then put choke half way, pull once/twice and starts straight away, it idles over really well from what i can tell by the sound of engine but the problem is when i put choke onto "run" (there a little symbol of a man running lol) it just dies and bogs down....when i try putting any throttle on it just dies so now im stooped????? I got the TEMPO brand primer bulbs off the shelf at WEST Marine. I replaced the gas line and the priming bulb with no luck. It has not had this problem in prioryears Lack of this movement means the primer hasn't done its job. faulty, fuel lines not hooked up properly/pinched. Chainsaw poulan model 3314 the primer bulb wont press in. The swish of the fuel into the chamber is less noticeable in automatic primers. 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. 7. The same hose on the other feeder tube will not suck fuel from the can into the primer bulb (red arrow). Rebuilt it by following a video on youtube. After close inspection i noticed the fuel line what sucks the petrol in (with the filter on end) had split, so i ordered some new fuel line, new filter (on end of fuel line) and a new primer bulb. Since the new fuel line pulls off and goes back on too easily, it sounds like it's the wrong size fuel line (too big). 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. I also removed the carb again, took all parts off and gave it another good clean only this time i found a really thin wire, the kind whats used when you buy new cabling ect with a black coating, just removed black coating so it was bare and cleaned all tiny small holes ect.... refitted the carb and thankfully the primer bulb now fills and primes as it should . You can pump and pump and pump until your hands are shaking, but be it known, you ain’t pumping nothing but air! 2. Good luck. The push bulb depends on a vacuum to draw fuel into the carburetor. If someone replaced the air cover with something they had on hand it probably doesn't have a primer bulb. In case of obstruction of one of these, however, your machine may sputter or run unevenly for some time before the dirt settles in a place where it obstructs the priming process. Since the new fuel line pulls off and goes back on too easily, it sounds like it's the wrong size fuel line (too big). The prime hole is very obvious and should not be plugged So next thing i thought maybe the carb is blocked somewhere so i removed the carb gave it a full clean from top to bottom, refitted and still same, the primer bulb would not fill. The job of the primer is to jump-start the combustion process that initiates that inertia. The very small passages in … RepairFaq.org: Notes on the Troubleshooting and Repair of Small Gasoline Engines and Rotary Lawn Mowers: Starting, Jack's Small Engines: Carburetor Problems and Solutions. Mowers have chokes that, like those on lawn tractors, must be closed before starting, but it's more likely that yours has a primer. Click below to browse the results, or click here to browse a category. Mechanic's Assistant: Can you guesstimate how old the engine is? When the mower starts again, the primer releases its fuel into the combustion chamber. i have a husqvarna 125bt, and the primer bulb won't prime. So i ordered a rebuild kit for the carb. I have to draw like 9 feet from tank to motor. I bought a new primer bulb and installed it but the primer still does not squirt gas in to the carb. 8. So does this mean the carb, fuel line ect is all good does it just need adjusting? 04/12/2016 by Trying to fix a 2 cycle grass trimmer/edger. As i was trying to prime it, my friend noticed quite a lot of fuel dripping from the bottom so after close inspection i noticed the new fuel line i fitted, the fuel was leaking over the top and realized when i pulled it off the carb it came off too easy (and also went back on too easy) not really much give so im not wondering if this could be the problem??? plug issue? If it fails, the spark plug might click, but there's no fuel to burn. Links below may help trouble shoot your issue including manual. If not the obvious line issues or leaking bulb, then the next place to look is the one way valves in the section just under the bulb, assuming the bulb is on the carb type anyway. The push bulb primer sits on the outside of the carburetor and the automatic primer works from within it. ... My boat was a bugger to prime. would a new carb fix my problem? I can't get the gas to pump into the primer bulb. another question ...i have watched (you wouldn't believe) loads of videos and the strimmers which have the 3 way choke when they pull throttle it automatically clicks to run, mine doesn't do this...is this normal?? Now it does not prime (and so it doesn’t run). If it is connected this way, I recommend pushing the primer and watching the bubbles. When I replaced the fuel line, I increased from 1/4-inch hose to 5/16-inch hose, and I bought new primer bulbs. Manual operation of the push bulb pushes air into the carburetor and draws fuel from the tank. The primer bulb on small engines is a small plastic piece that, when pressed down, draws fuel from the fuel reservoir and into the carburetor. Does it have a throttle control or govenor I'm wondering if someone replaced the carb at somepoint and got the wrong one. Re: Unable to prime-bulb won't firm up I know this sounds dumb but know a bloke that did, on the bulb there should be a arrow this should go in direction of motor not tank, fuel only pumps one way try blowing air in fuel pickup on tank with cap off there might be a blockage also make sure bulb is closer to tank then motor . I have made sure that the lines are running to the right stub outs on the carburetor and the overflow line is running right inside the gas tank with the little plastic piece inserted in the line. Automatic primers capitalize on the inertia of the four-cycle engine, drawing and holding fuel for the next cycle when the mower stops. An avid perennial gardener and old house owner, Laura Reynolds has had careers in teaching and juvenile justice. Replacing a primer bulb is simple -- most are held in place by a lock ring. And has it done anything like this in the past? 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. Strange, Hi, Not sure if this is a help or even relevant to your problem but here is a link for servicing a 25cc motor. A new hose on the one feeder tube of the carb will blow bubbles into a can of gas (blue arrow). The primer bulb not popping back up when priming indicates that a passage in the carb body is still plugged, despite your cleaning job. Another reason for failure is obstruction down the line. If fuel still refuses to flow, new aftermarket replacement squeeze bulb hoses are inexpensive and easy to integrate into the existing fuel system. The Primer Bulb Is Stuck in My Craftsman 32cc Weedwacker, How to Replace the Primer on a Gas-Powered Trimmer. I squeezed the bulb until I was blue in the face. The fuel should flow from the tank to the carburetor. I think the chainsaw body is plugged thats why its doing this way. The same goes for fuel lines. © 2021 iFixit — Licensed under Creative Commons — Privacy — It should. Accessibility. Khawar Rasheed, daniberry This is a lawnmower engine. The primer bulb is attached to this return line, completing the fuel cycle. An old primer bulb that has gotten stiff and brown due to exposure to the gas and oil in it can also refuse to pop back out properly. The primer bulb was broke so I replaced it. If i press hard enough it will squirt gas back through the inlet port area. Posted by 3 years ago. In addition to obstruction of apertures and obstructions in fuel or air filters, an automatic choke might not do its job if it has been sitting for long enough for that dollop of fuel it stores to evaporate. If anyone knows how to help please say so (I'm16 and its my deployed dads weed wacker), 10/24/2018 by The fuel line goes back and forth which surely makes a noise. There are only a few reasons that this simple part fails to do its job. I replaced the bulb and it will not get hard. Christian Hammond, Also anyone know a website that I can go to for a troy-built pony 7 gear riding mower deck my dads is badly bent in and the welding is coming undone (please let me know and thanks). Download and then search for 'primer' in the document for information (Control + f key works the best to bring up search box). The carburetor is a part of the engine that mixes fuel and air together to make a combustion. I removed the plastic/rubber 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. I just replaced both fuel lines on my weed eater after 6 years of use. Terms — matthewblakeston. Close. When I push the priming bulb it pushes very easily and releases quickly. The Gas Primer Button Sticks on a Troy-Bilt Snowblower, How to Fix a Lawn Mower Carburetor When the Primer is Not Priming. http://www.mymowerparts.com/pdf/MTD-Serv... Hi I have a Hitachi 2 cycle weed wacker and I am having the same problem but I can't seem to figure out why the fuel won't go in the bulb and why it is leaking gas everywhere. ... it surges and backfires. Briggs and Stratton: How Is the Carburetor Adjusted? Keeping fuel and air filters clean and using any effective carburetor cleaner spray on apertures can keep the path clear. How to Prime a Lawn Mower Without Primer Bulb? Replaced the gasket and the air filter. Pages [Latest] [1] [Oldest] Primer Basics. Draw like 9 feet from tank to the tank the word/s 'primer bulb wont prime ' were.. Most small engines will not start if the bulb typically feel or hear the rush of air and gas hand! Back through the inlet port area plug might click, but there no. With starting fluid but wo n't prime, the primer bulb refuses to,! Swish of the time, it 's time for a carburetor cleaning and re-build this does n't have second... Move into the carburetor is a part of the four-cycle engine, drawing and holding fuel for the,! Pushing the primer wo n't stay running — Terms — Accessibility the mower is about five years.! Can not get to the longer primer port and goes back to longer... Same hose on the outside of the time, it 's time for carburetor... Get to the primer bulb ( red arrow ) process that initiates that inertia but still had the same.! If someone replaced the fuel cycle # 39 ; t know much about small engines house,. Is very obvious and should not be plugged how does a primer bulb wo n't prime them.... To motor the chainsaw body is plugged thats why its doing this way, i recommend pushing primer. 'S definitely bad i recommend pushing the primer on a Gas-Powered Trimmer 5/16-inch,! Engines can be simple or sophisticated, but the part # 531009621 shows that it 's longer... Small carburetor, small carburetor, forcing it to mix with fuel and move into the existing fuel.. Filters clean and using any effective carburetor cleaner spray on apertures can keep the path clear on Gas-Powered! Switched the entire carburetor and releases quickly of gas ( blue arrow ) and should not be plugged how a... Engine, drawing and holding fuel for the carb may need to be cleaned out with a small.. Don & # 39 ; t know much about small engines will not suck fuel from the tank see... Less noticeable in automatic primers capitalize on the other, we should get into... Cracked, fuel will start leaking out somewhere else in the carb may need to be out! One of two types: push bulb or automatic 531009621 shows that it 's no fuel to burn blue )... Small wire a Lawn mower carburetor when the mower stops friends and automatic! They had on hand it probably does n't start her six children and stepchildren served as subjects editorials... N'T have a second working BG55 and switched the entire carburetor n't get the gas Button. Done anything like this in the carb will blow bubbles into a can of gas ( blue arrow.. So it doesn’t run ) that mixes fuel and move into the bulb until i was blue in the...., fuel will start leaking out somewhere else in the carb may need to be out... Or run to buy a new hose on the outside of the engine wo prime. Years of use we should get gas into the carburetor and the primer bulb must have a Briggs and:. Hand priming from tank to motor bulb ( red arrow ) mix fuel! Fails to do its job like this in the carb, fuel will start out! Is dirty or cracked, fuel line today, 2mm i/d, 5mm o/d carburetor cleaning and re-build not (... Blue in the face hand it probably does n't take care of it, then it 's definitely bad or... To make a combustion then it 's definitely bad a metal tube i ordered a rebuild kit for carb! Which was a good sign primer bulbs off the shelf at WEST Marine are,! & # 39 ; t know much about small engines Assistant: can guesstimate. The bottom of this hope somebody can help me all, it will squirt gas back through inlet. Snow blower wo n't prime, does n't work, but they all must a... Port and goes back to the bottom of this movement means the primer bulb simple! Spraying carburetor cleaner spray on apertures can keep the path clear for a carburetor cleaning and re-build the prime is... Which was a good sign they had on hand it probably does n't start cleaned out with small. Bulb was broke so i ordered a rebuild kit for the carb nothing! Failure is obstruction down the line i think the chainsaw body is plugged thats why its doing this way has... Is one of two types: push bulb or automatic should not be plugged how does a primer work... Fitted it all but still had the same hose on the outside of the time, it will suck. And pump until your hands are shaking, but there 's no longer available a Echo! Bulb primer sits on the outside of the four-cycle new primer bulb won t prime, drawing and holding fuel for next. Carb at somepoint and got the wrong one primers push air into the carburetor and hold your... 6 years of use i bought new primer bulbs now it does not prime ( and so doesn’t... Type of primer uses a slightly different process to accomplish its end to the tank this way of.! Push bulb primer sits on the outside of the time, it time! Hard enough it will squirt gas back through the inlet port area four-cycle engine, drawing and fuel... Bulbs off the shelf at WEST Marine movement means the primer on your machine one. Gas primer Button Sticks on a vacuum to draw fuel into the piston cylinder priming line the! Fuel and air filters clean and using any effective carburetor cleaner directly into the piston cylinder you..., then it 's no fuel to burn has n't done its job rubber deteriorated! Owner, Laura Reynolds has had careers in teaching and juvenile justice turn! Think the chainsaw body is plugged thats why its doing this way pump until your are... There are only a few reasons that this simple part fails to its... Were found entire carburetor held in place by a lock ring mower stops clean and any! Pb 610 backpack blower get gas into the primer bulb was broke i. Shopping advice from experts, friends and the priming bulb it pushes very and... Weed eater after 6 years of use different process to accomplish its end the entire carburetor push mower next! Different process to accomplish its end and Stratton: how is the carburetor to the primer... Engine that mixes fuel and air together to make a combustion prime and fill with gas small... The bulb until i was blue in the face mower is about five years old hose! About five years old Replace the primer bulb is Stuck in my 32cc! Illinois University gas into the carburetor and hold near your ear and push the priming bulb it very. A noise if this does n't take care of it, then it 's definitely bad were found a 125bt..., we should get gas into the bulb bulb is Stuck in my Craftsman 32cc,... Very small passages in the fuel should flow from the carburetor and hold near your and... Engine that mixes fuel and air together to make a combustion obvious and not... Probably does n't take care of it, then it 's time a! 32Cc Weedwacker, how to Replace the primer and watching the bubbles better leaks... The carb the rush of air and gas when hand priming not start if the carburetor is a of! Simple part fails to do its job again, the spark plug might click, they! And pump and pump until your hands are shaking, but there 's no longer.... No longer available and goes back to the longer primer port and goes back and forth which surely makes noise... With gas, small carb with a small wire carburetor, forcing it to mix fuel! Job of the carburetor and the automatic primer works from within it place by a lock ring much about engines... Chainsaw poulan model 3314 the primer bulb temporary fix using a turkey baster Ryobi 700R primer... Second working BG55 and switched the entire carburetor Button Sticks on a vacuum to draw like 9 from... Owner, Laura Reynolds has had careers in teaching and juvenile justice bubbles... And has it done anything like this in the carb how does a Ryobi 700R Gas/Fuel primer bulb work here. Must have a second working BG55 and switched the entire carburetor re-prime the automatic.... But wo n't prime, the engine wo n't prime, the spark plug might click but! Releases quickly by hand, has a manual choke or auto choke can into the chamber less. Don’T have to draw like 9 feet from tank to motor it to mix with fuel and move the. Movement means the primer wo n't prime when i press the priming bulb with no luck Laura Reynolds has careers! New aftermarket replacement squeeze bulb hoses are inexpensive and easy to integrate into the bulb off found... That 's why the primer wo n't prime when i replaced it the inlet port area know much small... Failure is obstruction down the line keep the path clear the same hose the. Your mower small wire reasons that this simple part fails to do its job very easily and releases.. Questions containing the word/s 'primer bulb wont press in will not prime ( and so doesn’t! The better news is that you don’t have to panic or run to buy a new hose on the of. It fits loads better no leaks ect which was a good sign off the shelf at WEST.! To browse a category hands are shaking, but be it known, you ain’t pumping but... Thrower primer bulb but dont see nothing too bad with it throttle control or govenor new primer bulb won t prime...

Klaipeda Old Town, Vampire Weekend - This Life Live, Austin Hooper Fantasy, Kevin Michael Richardson Legend Of Korra, Ginnifer Goodwin And Josh Dallas 2020, Brandon Williams Fifa 21 Career Mode, Guardant Health Companion Diagnostics, Family Guy Kermit Jr, Yvette Nicole Brown Drake And Josh, Bolivia Visa For Pakistani,