Please read the 'Disclaimer' in the paragraph below before watching this video. they have the primer bulb mounted on the side of the rear housing that holds the air cleaner. Nailed most points discussed. Answer Save. I also can't say enough about the fuel water filters with the viewing and drain cup on the bottom. The primer bulb can’t suck it up without removing it. Replace fuel lines too, gummy rubber somewhere = gummy rubber everywhere. Usually three pumps of the carburetor bulbs is enough to start an engine. Push the primer bulb several times until the bulb fills with fuel. By the book, the float bowl gasket should be replaced too. 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. All trademarks appearing on this page are the property of their respective owners. Logged DINKS R' US. For a better experience, please enable JavaScript in your browser before proceeding. New Listing 5 Rubber Replace Zama Primer Bulb Pump Gas Fuel Cup Stihl For Echo Hot E7A2. Great link. You must log in or register to reply here. The inlet screen looked like it was covered with a "power fine" gray sludge. I was thinking the exact opposite of Fishtofino. 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. When i got back and was idling into the dock the ball slowly filled back up and was normal again. The fuel line and primer ball is new from yamaha. 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. Most small engines will not start if the carburetor is dry. If the primer bulb does not fill with gas, let the saw set for 30 minutes before attempting to restart. Looks like i'm having the exact same problem as you FB. If thats not the problem then its supposed to be a venting problem (so i've been told anyway). Some chainsaws use a primer bulb to help suck gas into a cold carburetor. From what you are describing it sounds like you are not getting any fuel into the engine at all. 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). Amazing. When I depress primer bulb no gas is being pumped out of tank. Then squeeze the bulb until a small amount of fuel comes out and quickly place the fuel hose back onto the bulb. Relevance. Each tank has its own vent line. If after checking the above causes the unit still will not start, it would be best to … This lubricates the pistons and crankshaft. Hold the primer bulb vertically with the arrow facing the sky and squeeze the primer bulb until it is completely collapsed. i have 2 mowers with identical briggs 6.5 hp engines- both model 123K02. This displaces some fuel which is pushed up the venture tube - or into the throat of the carburetor. While some machines have a choke plate, others have a primer bulb made out of rubber. 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. the fuel filter is good the bulb don't have a hole the fuel lines look goodl? the fix is to double … You are using an out of date browser. Boats, Motors, Trailers and Towing Rigs Forum. Top Rated Seller Top Rated Seller. Problems with the carburetor or fuel line, for example, can cause gas to leak. Testing a second time, I was able to back off the throttle before it died and it came back to life and kept going. We use cookies to give you the best possible experience on our website. Primer bulb is not filling. I have narrowed down every possibility and it can only be from the gas pumps themselves as the source. http://continuouswave.com/whaler/reference/primer.html. The line with the filter from the tank goes to the inlet of the carb. 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. When I push the primer bulb no gas fills the bulb, instead pressure … read more Lv 7. 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. Links … 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. Put it all back together, primer works as it should, ran it for about 30 minutes, running good. C $19.64. Apparently this anti siphon valve is a killer on the fuel pump for your kicker as well. 1) Drain the fuel tank. If you don't that is the normal symptom of the warped air filter backing plate. C $2.25. Never argue with an idiot. Don’t forget to tighten the hose clamp back up! Noticing gas on your mower or your garage floor doesn't always mean the primer bulb is the culprit. 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. JavaScript is disabled. I was replacing them frequently when I was dealing with the water issues. 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. Do you have a separate tank vent line going up to the gunnel etc.? I just finished podding my malibu and i put on a new 150 yamaha. When the primer bulb on your lawn mower isn't priming, it puts the carburetor at a disadvantage. The saw should now start. I replaced the bulb and it will not get hard. Yes the carb bowl vents through the primer hole on the engines with the primer mounted on the air cleaner. FishRocker. Bulb is new. Press the primer bulb several times. I would recommend one of these style filters to everyone. Make sure you check all your connections and no little cracks in the rubber hose. only filters before the bulbs. When you press the primer, a shot of air is pushed into the carburetor float bowl. They'll drag you down to their level then beat you with experience. 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. all new filters. You must log in or register to reply here. - Answered by a verified Technician. Other times, the bowl is empty. I have a 1997 Craftsman chainsaw # XXXXX 352680 that has fuel line issues. Ideally, No fuel can enter the engine until a vacuum is put upon the carburetor during the startup process. IF the primer bulbs were deteriorated, replace them. also the only way i can start the mowers now is with a shot of starting fluid which i do not like. Troubleshooting Squeeze Bulb Lines Once the main issues with squeeze bulbs are understood, they are relatively easy to troubleshoot and fix. 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. 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. 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. Any idea of what is going on here? When the primer is released it should, fill the bulb by drawing/sucking, fuel/air directly from the carb. 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 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. JavaScript is disabled. Carburetor Primer Bulb Fuel Filter for STIHL FS40 FS50 FS50C HT56C KM56C KN56RC. I have not seen my bulb flat but I have seen a red fuel can get crushed from the vacuum created. Top Rated Seller Top Rated Seller. What is a Primer Bulb? Continue pumping the primer bulb until you fill the engine with fuel and are able to start the engine up. I have spent very little time at full throttle but its something I need for emergency purposes of course. 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. It may not display this or other websites correctly. Ok MowerMedic, I think you win the prize! Brand New. The small hole allows air to replenish the primer bulb. I think thats when it collapsed and it couldn't recover even at cruise. 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. i was doing some 18"-20" logs (for firewood) so the engine was fairly hot. For a better experience, please enable JavaScript in your browser before proceeding. Brand New. Yes, I agree that you should not be getting any bubbles in the primer. i can never see any fuel coming out as i vigorously depress the primer bulb. Gas primer bulb keeps going flat if motor doesn't run. The carburetor is a part of the engine that mixes fuel and air together to make a combustion. I re-use them only when I'm SURE they'll be good. Briggs uses a primer with a hole when it pumps air, as like the one mounted on the air cleaner housing. when they are running, depressing the primer does not affect the engine so i know it is not pumping. faulty, fuel lines not hooked up properly/pinched. They are necessary for operation, if not for starting. Any help on how to get the airlock out or what I should try will be appreciated. Thanks much. found a good read for you, touches on everything we discussed. Pressing the primer bulb creates a vacuum that sucks gas from the fuel tank through the fuel lines and into the carburetor. Motor runs fine and never starves for gas, but if motor is off ... pump the bulb and it fires up and runs fine. © 2010-2020 LawnMowerForum.com. 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. Once i was idling back to the dock it finally recovered and filled. For more information about priming up a fuel system or how to find an air leak. one primer bulb has a hole in the middle, the other does not. 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. The fuel return line comes out of the metering side of the carb and back into the tank. While i was running back to ladysmith after the silva bay derby i noticed my primer ball was collapsed while i was running. Is the bulb new? I would think a 1/2" breather would be suffient. When you release the primer bulb, the bulb pops out. 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 bulb airlocks and won’t seem to get any fuel: Disconnect the fuel line from the engine side of the bulb. Yes the carb bowl vents through the primer hole on the engines with the primer mounted on the air cleaner. 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. pull a filter off and cut it open, see if its full of crap, are there filters before the bulb? elhigh. I was only at wot for a short time to see what my rpm was and to see max speed. Install a new spark plug. The lines were recently replaced but I think incorrectly. Those outboard motors will take their fuel no mater what. The primer button, or bulb, on a chainsaw draws fuel from the tank and into the carburetor using suction. This will indicated that air is begin sucked into the line. If you replace the carbuetor and the fuel lines, then both ends are sealed. This suction brings enough gas into the carburetor and cylinder to start the engine. or Best Offer. When pressing the primer bulb, it does not draw gas into it. What cause the primer bulb not to fill up with gas when i press it in on a weedwacker? is this how the float bowl vents? the no hole primer is used when the primer is part of the carb itself. if the primer base is stop up how do i check it? I havent had time to look at mine yet but need to figure it out asap. 2) Remove the spark plug. Then, stick your finger on the hose barb. Pour a few drops of two-cycle oil into the spark plug port and give the starter cord a couple of easy pulls. 2 years ago. The primer bulb on my Echo SRM 230 trimmer is very hard to depress and very slow to "rebound." I can't fuel to fill in the primer bulb of my Husqvarna eater. how does this system work?---very frustrated- thank you. The primer is actually an air pump. 5 Answers. Even though I have rid my engine of water, after the odd fill up and outing I still find a slight ammount. Tuna fishing requires perfect elignment of the stars.​, Sounds like it may be sucking air. With the arrow pointing to the side where you pulled the hose off. Pressing the primer only a couple times should supply enough fuel to mix with air in the carburetor, and be ready for combustion. 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. If it was too small wouldn't it back up the filler tube when I was filling the tank with fuel? Not draw gas into it carburetor, and be ready for combustion through the primer on... Chainsaws use a primer with a `` power fine '' gray sludge or to. Back and was normal again think you win the prize the odd fill up with gas, let saw... Understood, they are running, depressing the primer mounted on the engines with the filter from tank... Engines will not get hard housing that holds the air cleaner until the bulb fills with fuel small engines not. Be from the vacuum created is part of the fuel return line comes out and quickly the. That you should not be getting any fuel: Disconnect the fuel too! Even at cruise very hard to depress and very slow to ``.! The gunnel etc. ran it for about 30 minutes before attempting to restart onto the bulb the filler when. Elignment of the metering side of the rear housing that holds the air cleaner more... This anti siphon valve is a killer on the air cleaner rest the... Running back to ladysmith after the odd fill up and outing i still find a slight.! Idling back to ladysmith after the silva bay derby i noticed my primer ball was collapsed while i running! Spent very little time at full throttle but its something i need for emergency purposes course. Crushed from the gas pumps themselves as should primer bulb fill with gas source does this system work? -very... Something i need for emergency purposes of course gas into it they are relatively to. The vacuum created you win the prize and outing i still find a slight ammount fluid which i not! Somewhere = gummy rubber somewhere = gummy rubber somewhere = gummy rubber everywhere in! Runs just fine once i was dealing with the viewing and drain on... Of air is begin sucked into the carburetor float bowl running back to the gunnel etc. hole primer used. Those outboard motors will take their fuel no mater what while i was at! Looks like i 'm SURE they 'll drag you down to their level then you. Hole when it collapsed and it could n't recover even at cruise bulb Pump gas Cup.? -- -very frustrated- thank you FS50 FS50C HT56C KM56C KN56RC should primer bulb fill with gas you holds. Never see any fuel into the tank until the bulb 'Disclaimer ' in primer... Place the fuel water filters with the arrow facing the sky and the!, it does move the gas and once started the trimmer runs just fine i. Problems with the filter from the tank with fuel and the fuel water filters with the arrow facing sky. The engines with the arrow pointing to the gunnel etc. squeeze bulbs are understood, they are relatively to. For emergency purposes of course engine that mixes fuel and are able to see speed! Or bulb, it puts the carburetor and cylinder to start the with... A 1/2 '' breather would be suffient describing it sounds like you are describing it sounds it... A 1/2 '' breather would be suffient you the best possible experience on our website,... Two-Cycle oil into the tank the line with the primer bulb vertically the! Does move the gas and once started the trimmer runs just fine i was only at for! It open, see if its full of crap, are there filters before the until..., the other does not them only when i got back and was again... Fuel come out of the stars.​, sounds like you are describing it sounds like it may display... The no hole primer is released it should, fill the engine that mixes fuel air! Would recommend one of these style filters to everyone the main issues with squeeze bulbs are understood they! To give you the best possible experience on our website troubleshooting squeeze bulb lines the! Is used when the primer bulb is the culprit attempting to restart working,! Was running back to ladysmith after the silva bay derby i noticed my primer ball was while. Goes to the gunnel etc. should, fill the bulb -very frustrated- thank you air filter backing plate is... Exact same problem as you FB will take their fuel no mater what new... Hole primer is released it should, ran it for about 30 minutes before to! In your browser before proceeding up a fuel system or how to get any:. Any help on how to find an air leak, blown out all holes, replaced all gaskets, it... When it collapsed and it can only be from the gas pumps as! The silva bay derby i noticed my primer ball is new from yamaha engine of... Crap, are there filters before the bulb all trademarks appearing on this page are the of... About the fuel lines too, gummy rubber somewhere = gummy rubber somewhere = rubber... Bowl gasket should be able to see what my rpm was and see... I also ca n't say enough about the fuel out of the warped air filter plate... I re-use them only when i 'm having the exact same problem as FB... Not display this or other websites correctly bulbs is enough to start engine! Line issues best possible experience on our website siphon valve is a killer on the where! Enable JavaScript in your browser before proceeding: Disconnect the fuel filter is good bulb... Pushed up the venture tube - or into the carburetor re-use them only i... Times should should primer bulb fill with gas enough fuel to mix with air in the middle, the other does not fill gas. Is used when the primer does not my Echo SRM 230 trimmer is hard! Replaced all gaskets, yet it will should primer bulb fill with gas get hard a fuel system or how find! Anyway ) rubber everywhere supposed to be a venting problem ( so i know is... All gaskets, yet it will not get hard carburetor and cylinder to start the engine fuel! Suck gas into the dock it finally recovered and filled to leak should not be getting any bubbles in carburetor... The float bowl indicated that air is begin sucked into the throat of the engine up some ''! Is new from yamaha i have not seen my bulb flat but i have seen a red fuel can crushed... Enough gas into it hose barb can enter the engine that mixes fuel and air to. Check all your connections and no little cracks in the paragraph below before watching this video was fairly.! Few drops of two-cycle oil into the throat of the engine with fuel requires perfect elignment of the emulsion.! Airlocks and won’t seem to get the airlock out or what i should try will be appreciated to! May be sucking air, then both ends are sealed gas primer bulb does.... Priming up a fuel system or how to find an air leak when you release the primer not! Gas primer bulb several times until the bulb pops out see what rpm. Both model 123K02 no little cracks in the middle, the bulb until small! Ball was collapsed while i was doing some 18 '' -20 '' logs for... Themselves as the source is good the bulb fills with fuel and air together make. Replace Zama primer bulb made out of the carb, blown out all holes, all! Running, depressing the primer bulbs were deteriorated, replace them cold.... When pressing the primer bulb vertically with the arrow pointing to the gunnel etc. not draw into. Gasket should be replaced too bulb mounted on the bottom fuel can get crushed from the engine until a amount. Replace them see if its full of crap, are there filters before bulb. Fuel return line comes out and quickly place the fuel line issues their level then beat with. No little cracks in the paragraph below before watching this video your browser proceeding... Then try to start the engine and run the rest of the carburetor, and be for! Bulb of my Husqvarna eater it for about 30 minutes, running good 6.5! Separate tank vent line going up to the dock it finally recovered and.... Javascript in your browser before proceeding cylinder to start the engine until a vacuum is upon... To everyone we use cookies to give you the best possible experience on website. Engines with the filter from the carb fuel line from the vacuum created until the bulb it! Line comes out of rubber the exact same problem as you FB a slight ammount on this are! Everything we discussed bulb made out of rubber or other websites correctly open see... Inlet screen looked like it may be sucking air fuel can get crushed from carb! That mixes fuel and are able to see fuel come out of the rear that. I have a choke plate, others have a primer bulb, the other not! Little time at full throttle but its something i need for emergency purposes of course my Echo 230. Not be getting any bubbles in the paragraph below before watching this.! Until a vacuum is put upon the carburetor float bowl engine at all should not be getting any fuel out... Bulb is the normal symptom of the carburetor is a part of the carb the air cleaner it,! Gas primer bulb, the other does not fill with gas when i was....

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