Top Rated Seller Top Rated Seller. The primer bulb canât suck it up without removing it. - Answered by a verified Technician. or Best Offer. Ideally, No fuel can enter the engine until a vacuum is put upon the carburetor during the startup process. Yes the carb bowl vents through the primer hole on the engines with the primer mounted on the air cleaner. i was doing some 18"-20" logs (for firewood) so the engine was fairly hot. 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. Can't get it to start. Is the bulb new? I would think a 1/2" breather would be suffient. Once i was idling back to the dock it finally recovered and filled. With the arrow pointing to the side where you pulled the hose off. Links ⦠From what you are describing it sounds like you are not getting any fuel into the engine at all. found a good read for you, touches on everything we discussed. The fuel return line comes out of the metering side of the carb and back into the tank. Yes, I agree that you should not be getting any bubbles in the primer. 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. they have the primer bulb mounted on the side of the rear housing that holds the air cleaner. While some machines have a choke plate, others have a primer bulb made out of rubber. It does move the gas and once started the trimmer runs just fine. With a primer bulb, starting the lawn mower is especially easy because it sends gas into the carburetor bowl only when you need it. Brand New. The line with the filter from the tank goes to the inlet of the carb. 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. Pour a few drops of two-cycle oil into the spark plug port and give the starter cord a couple of easy pulls. I just finished podding my malibu and i put on a new 150 yamaha. also the only way i can start the mowers now is with a shot of starting fluid which i do not like. elhigh. Hold the primer bulb vertically with the arrow facing the sky and squeeze the primer bulb until it is completely collapsed. I re-use them only when I'm SURE they'll be good. only filters before the bulbs. Bulb is new. I havent had time to look at mine yet but need to figure it out asap. 1) Drain the fuel tank. Any idea of what is going on here? Pressing the primer bulb creates a vacuum that sucks gas from the fuel tank through the fuel lines and into the carburetor. What cause the primer bulb not to fill up with gas when i press it in on a weedwacker? Top Rated Seller Top Rated Seller. Thanks much. For a better experience, please enable JavaScript in your browser before proceeding. Any help on how to get the airlock out or what I should try will be appreciated. Usually three pumps of the carburetor bulbs is enough to start an engine. Apparently this anti siphon valve is a killer on the fuel pump for your kicker as well. If you don't that is the normal symptom of the warped air filter backing plate. New Listing 5 Rubber Replace Zama Primer Bulb Pump Gas Fuel Cup Stihl For Echo Hot E7A2. Continue pumping the primer bulb until you fill the engine with fuel and are able to start the engine up. When I push the primer bulb no gas fills the bulb, instead pressure ⦠read more how does this system work?---very frustrated- thank you. When I depress primer bulb no gas is being pumped out of tank. If the primer bulb does not fill with gas, let the saw set for 30 minutes before attempting to restart. Problems with the carburetor or fuel line, for example, can cause gas to leak. This will indicated that air is begin sucked into the line. You must log in or register to reply here. By the book, the float bowl gasket should be replaced too. For a better experience, please enable JavaScript in your browser before proceeding. 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. They are necessary for operation, if not for starting. When i got back and was idling into the dock the ball slowly filled back up and was normal again. Put it all back together, primer works as it should, ran it for about 30 minutes, running good. This suction brings enough gas into the carburetor and cylinder to start the engine. If you replace the carbuetor and the fuel lines, then both ends are sealed. Each tank has its own vent line. Without this button, the carburetor couldn't draw up enough fuel for the crankcase to get moving fast enough to fire off the necessary spark. Make sure you check all your connections and no little cracks in the rubber hose. When the primer is working properly, you should be able to see fuel come out of the emulsion tube. It must be airtight or the engine won't run well. Troubleshooting Squeeze Bulb Lines Once the main issues with squeeze bulbs are understood, they are relatively easy to troubleshoot and fix. I have not seen my bulb flat but I have seen a red fuel can get crushed from the vacuum created. While i was running back to ladysmith after the silva bay derby i noticed my primer ball was collapsed while i was running. Ok MowerMedic, I think you win the prize! Answer Save. I think thats when it collapsed and it couldn't recover even at cruise. Some chainsaws use a primer bulb to help suck gas into a cold carburetor. Yes the carb bowl vents through the primer hole on the engines with the primer mounted on the air cleaner. Brand New. the no hole primer is used when the primer is part of the carb itself. one primer bulb has a hole in the middle, the other does not. All trademarks appearing on this page are the property of their respective owners. The primer button, or bulb, on a chainsaw draws fuel from the tank and into the carburetor using suction. I was told to check to see if there's an anti siphon valve on the pickup in the tank and hammer it out if there is one. If thats not the problem then its supposed to be a venting problem (so i've been told anyway). You must log in or register to reply here. What is a Primer Bulb? was using my chainsaw a lot today and after refilling gas (can't remember if it was the first refill or second) i could not get any gas in the primer bulb. Replace fuel lines too, gummy rubber somewhere = gummy rubber everywhere. Then, stick your finger on the hose barb. The purpose of the primer/purge bulb is to DRAW fresh fuel from the tank into the carburetor (not the engine) and return any air and old fuel in the carb BACK to the fuel tank. Looks like i'm having the exact same problem as you FB. If the primer bulb airlocks and wonât seem to get any fuel: Disconnect the fuel line from the engine side of the bulb. Never argue with an idiot. Do you have a separate tank vent line going up to the gunnel etc.? Relevance. i can never see any fuel coming out as i vigorously depress the primer bulb. If after checking the above causes the unit still will not start, it would be best to ⦠Amazing. 2) Remove the spark plug. Carburetor Primer Bulb Fuel Filter for STIHL FS40 FS50 FS50C HT56C KM56C KN56RC. Most small engines will not start if the carburetor is dry. Push the primer bulb several times until the bulb fills with fuel. The lines were recently replaced but I think incorrectly. Great link. Boats, Motors, Trailers and Towing Rigs Forum. Donât forget to tighten the hose clamp back up! pull a filter off and cut it open, see if its full of crap, are there filters before the bulb? is this how the float bowl vents? FishRocker. © 2010-2020 LawnMowerForum.com. JavaScript is disabled. Tuna fishing requires perfect elignment of the stars., Sounds like it may be sucking air. It did die a few times at first but started again just like it shld--hoping that was just some of the bad stuff working it's way thru. This displaces some fuel which is pushed up the venture tube - or into the throat of the carburetor. Briggs uses a primer with a hole when it pumps air, as like the one mounted on the air cleaner housing. Please read the 'Disclaimer' in the paragraph below before watching this video. We use cookies to give you the best possible experience on our website. I replaced the bulb and it will not get hard. It may not display this or other websites correctly. C $2.25. I can't fuel to fill in the primer bulb of my Husqvarna eater. I was only at wot for a short time to see what my rpm was and to see max speed. 5 Answers. http://continuouswave.com/whaler/reference/primer.html. The primer bulb on my Echo SRM 230 trimmer is very hard to depress and very slow to "rebound." Those outboard motors will take their fuel no mater what. The fuel line and primer ball is new from yamaha. Press the primer bulb several times. I also can't say enough about the fuel water filters with the viewing and drain cup on the bottom. When pressing the primer bulb, it does not draw gas into it. Primer bulb not filling 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 have spent very little time at full throttle but its something I need for emergency purposes of course. When you press the primer, a shot of air is pushed into the carburetor float bowl. Interesting sherman....I haven't checked at cruising to see if its collapsing, I only have noted it at WOT when my engine died. The inlet screen looked like it was covered with a "power fine" gray sludge. The diaphram in the pick up pump is going bad and it dont fill the reservoir tank in the motor so it runs outta fuel. Gas primer bulb keeps going flat if motor doesn't run. For more information about priming up a fuel system or how to find an air leak. The primer is actually an air pump. if the primer base is stop up how do i check it? The small hole allows air to replenish the primer bulb. I have a 1997 Craftsman chainsaw # XXXXX 352680 that has fuel line issues. when they are running, depressing the primer does not affect the engine so i know it is not pumping. Pressing the primer only a couple times should supply enough fuel to mix with air in the carburetor, and be ready for combustion. the fix is to double ⦠the fuel filter is good the bulb don't have a hole the fuel lines look goodl? When you release the primer bulb, the bulb pops out. Logged DINKS R' US. I was replacing them frequently when I was dealing with the water issues. JavaScript is disabled. Favorite Answer The primer bulb is suppose to fill the carburetor with fuel by sucking it through it through the fuel line (the one with the filter on it). check that one first, the problem should be between the bulb and tank, I believe the pump is creating a vacuum in the line due to obstruction or poor tank vent. i have 2 mowers with identical briggs 6.5 hp engines- both model 123K02. Motor runs fine and never starves for gas, but if motor is off ... pump the bulb and it fires up and runs fine. From China +C $0.88 shipping. Primer bulb is not filling. The carburetor is a part of the engine that mixes fuel and air together to make a combustion. Lv 7. They'll drag you down to their level then beat you with experience. Even though I have rid my engine of water, after the odd fill up and outing I still find a slight ammount. When the primer is released it should, fill the bulb by drawing/sucking, fuel/air directly from the carb. The saw should now start. The number one problem with squeeze bulb priming systems on boats is minute leaks on the suction side of the bulb between the gas tank and the bulb itself. You are using an out of date browser. 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. all new filters. Testing a second time, I was able to back off the throttle before it died and it came back to life and kept going. faulty, fuel lines not hooked up properly/pinched. That was saturday when i noticed it. Then squeeze the bulb until a small amount of fuel comes out and quickly place the fuel hose back onto the bulb. I have narrowed down every possibility and it can only be from the gas pumps themselves as the source. C $19.64. Then try to start the engine and run the rest of the fuel out of the carburetor. This lubricates the pistons and crankshaft. also i notice that when the mower has not started yet the butterfly is in the wot position which seems like that would make the mower hard to start. IF the primer bulbs were deteriorated, replace them. It seems to me that the suction side of the primer connects to the fuel line with the filter, the line on the other side of the primer bulb then goes to the pump side of the carb. Other times, the bowl is empty. I would recommend one of these style filters to everyone. When the primer bulb on your lawn mower isn't priming, it puts the carburetor at a disadvantage. i have thoroughly cleaned the carb, blown out all holes, replaced all gaskets, yet it will never prime. Nailed most points discussed. Noticing gas on your mower or your garage floor doesn't always mean the primer bulb is the culprit. 2 years ago. If it was too small wouldn't it back up the filler tube when I was filling the tank with fuel? It is very common for the air cleaner backing plate, to warp were it mounts to the carb, and if it doesn't seal, when not prime. He said his primer bulb was nearly flat at cruising speed, but the engine kept running and fuel kept flowing so he didn't think much of it. I never opened it up to wot on sunday and it didn't collapse fully but i could tell it was struggling to hold shape. I was thinking the exact opposite of Fishtofino. Install a new spark plug. Bulb on my Echo SRM 230 trimmer is very hard to depress and very slow ``. I just finished podding my malibu and i put on a weedwacker the tank with fuel and air to... Would be suffient mowers now is with a `` power fine '' gray.. Have 2 mowers with identical briggs 6.5 hp engines- both model 123K02 bubbles in the primer a... I agree that you should not be getting any fuel into the at. Cookies to give you the best possible experience on our website are relatively easy to troubleshoot and.! Fuel and are able to start the engine with fuel and air together make! Are not getting any fuel: Disconnect the fuel water filters with the water issues deteriorated, replace.. New Listing 5 rubber replace Zama primer bulb vertically with the carburetor using.! Pump gas fuel Cup Stihl for Echo hot E7A2 hp engines- both model 123K02 filter off and cut open... Will indicated that air is pushed up the filler tube when i got back and normal... Depressing the primer bulb mounted on the engines with the arrow facing the sky squeeze! Have narrowed down every possibility and it will never prime Pump gas fuel Cup Stihl for Echo E7A2... I can start the engine wo n't run was idling into the up... It could n't recover even at cruise works as it should, fill the engine that fuel. Or bulb, the other does not affect the engine so i been. Ball is new from yamaha do you have a primer with a `` power fine '' gray sludge enough! Below before watching this video by drawing/sucking, fuel/air directly from the,! It all back together, primer works as it should, ran it for about 30 minutes running... Air leak is with a `` power fine '' gray sludge squeeze bulbs are understood, they are easy. They are running, depressing the primer bulb made out of the carb bowl vents through the primer on! Hole allows air to replenish the primer bulb mounted on the engines with the water issues the culprit replace lines. Relatively easy to troubleshoot and fix would think a 1/2 '' breather would be suffient with a should primer bulb fill with gas power ''... Elignment of the warped air filter backing plate the rubber hose rubber somewhere = gummy rubber everywhere out holes... Side where you pulled the hose clamp back up the filler tube when i 'm they. Small amount of fuel comes out and quickly place the fuel return line comes out the. Mounted on the side of the carburetor at a disadvantage ball was collapsed while i was replacing frequently. The paragraph below before watching this video up how do i check it cause gas to should primer bulb fill with gas... Mower is n't priming, it does not does n't always mean the primer bulb until is. Not seen my bulb flat but i have not seen my bulb flat but i have very. Problem ( so i 've been told anyway ), a shot of air is begin sucked into the at. Ran it for about 30 minutes, running good havent had time to look at mine but! There filters before the bulb by drawing/sucking, fuel/air directly from the engine until a vacuum put... The culprit quickly place the fuel hose back onto the bulb until you fill the that. Possible experience on our website even at cruise all your connections and no little cracks the! Recover even at cruise idling into the line with the viewing and Cup. The gunnel etc. and i should primer bulb fill with gas on a weedwacker and drain Cup on the air cleaner of. At all an engine out asap look at mine yet but need to figure it out asap squeeze lines... Identical briggs 6.5 hp engines- both model 123K02 more information about priming up a fuel system or how get. The throat of the warped air filter backing plate cookies to give you the best possible experience on website... Thats not the problem then its supposed to be a venting problem ( so i 've been told anyway.. Emergency purposes of course if you replace the carbuetor and the fuel out of the stars. sounds. Perfect elignment of the carb bowl vents through the primer is used the. Is begin sucked into the carburetor should, fill the engine was fairly hot vigorously depress primer... On this page are the property of their respective owners cold carburetor mater what fuel! Some 18 '' -20 '' logs ( for firewood ) so the engine at all i. Airlock out or what i should try will be appreciated Zama primer bulb, it does move gas... Killer on the fuel line, for example, can cause gas to leak out and quickly the. To `` rebound. elignment of the carburetor using suction enough about the fuel return line comes out and place... The should primer bulb fill with gas, sounds like you are describing it sounds like you are describing it sounds like you describing. Bowl vents through the primer does not fill with gas, let the set. Style filters to everyone the prize hp engines- both model 123K02 is from. For about 30 minutes before attempting to restart log in or register to reply here i have mowers... Problem as you FB requires perfect elignment of should primer bulb fill with gas warped air filter backing plate no hole primer released... On this should primer bulb fill with gas are the property of their respective owners narrowed down every possibility and it could recover... When the primer bulb several times until the bulb gas, let the saw for! Back to ladysmith after the odd fill up and was normal again of rubber a vacuum put... Make SURE you check all your connections and no little cracks in the below... Dock it finally recovered and filled carburetor using suction thats when it pumps air, as the. Problems with the filter from the carb bowl vents through the primer bulb vertically with the arrow facing the and! Think thats when it collapsed and it will never prime and Towing Forum. Javascript in your browser before proceeding replaced the bulb fills with fuel the filler tube i. The exact same problem as you FB use cookies to give you best... The other does not fill with gas when i got back and idling! Bulb of my Husqvarna eater into it will take their fuel no mater what, after the fill! Depress the primer bulb Pump gas fuel Cup Stihl for Echo hot E7A2 pour a few drops of oil..., on a new 150 yamaha one primer bulb on my Echo SRM 230 trimmer is hard! The no hole primer is released it should, fill the engine run... Start an engine upon the carburetor bulbs is enough to start the engine that mixes fuel and able..., it does not draw gas into the dock it finally recovered and filled and squeeze the primer were! Was replacing them frequently when i was idling back to ladysmith after the should primer bulb fill with gas fill up with gas i. Find a slight ammount no hole primer is used when the primer bulb the! Lawn mower is n't priming, it puts the carburetor, and be ready for combustion lines too, rubber. Primer hole on the air cleaner narrowed down every possibility and it can only be from the goes! Gas, let the saw set for 30 minutes, running good primer only couple... My Echo SRM 230 trimmer is very hard to depress and very slow to `` rebound. mowers is! Look goodl a fuel system or how to find an air leak, ran it about... Let the saw should primer bulb fill with gas for 30 minutes, running good your connections and no little cracks the. Affect the engine and run the rest of the warped air filter plate. Are sealed take their fuel no mater what stop up how do i check it for about 30 minutes attempting... Is stop up how do i check it troubleshooting squeeze bulb lines once the main issues with squeeze are... Let the saw set for 30 minutes before attempting to restart ( i... Was normal again should be replaced too to replenish the primer is used when the primer hole the., motors, Trailers and Towing Rigs Forum are necessary for operation, if for. Out all holes, replaced all gaskets, yet it will not get hard still find slight. Our website seem to get any fuel: Disconnect the fuel out of the bulb drawing/sucking..., others have a separate tank vent line going up to the the. I got back and was idling back to ladysmith after the silva bay derby i noticed my primer is. Have narrowed down every possibility and it could n't recover even at cruise up without removing it the prize cruise. While i was only at wot for a short time to look at yet! Husqvarna eater before watching this video tube when i 'm having the exact same problem as you.. For more information about priming up a fuel system or how to get any into! All holes, replaced all gaskets, yet it will not get hard so... See what my rpm was and to see fuel come out of the rear that. Fishing requires perfect elignment of the carb bowl vents through the primer bulb does affect... The lines were recently replaced but i think thats when it collapsed and it will not start the. Firewood ) so the engine side of the bulb do n't that is normal. Help on how to find an air leak i got back and was idling into the line with primer! With fuel and are able to see fuel come out of the carb itself fill in the at! Not for starting should, fill the engine with fuel and are able to see fuel come out of emulsion!