the no hole primer is used when the primer is part of the carb itself. For more information about priming up a fuel system or how to find an air leak. Pressing the primer only a couple times should supply enough fuel to mix with air in the carburetor, and be ready for combustion. 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). Hold the primer bulb vertically with the arrow facing the sky and squeeze the primer bulb until it is completely collapsed. how does this system work?---very frustrated- thank you. Do you have a separate tank vent line going up to the gunnel etc.? You must log in or register to reply here. 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. I havent had time to look at mine yet but need to figure it out asap. Primer bulb is not filling. 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. http://continuouswave.com/whaler/reference/primer.html. It may not display this or other websites correctly. they have the primer bulb mounted on the side of the rear housing that holds the air cleaner. The inlet screen looked like it was covered with a "power fine" gray sludge. That was saturday when i noticed it. You must log in or register to reply here. Troubleshooting Squeeze Bulb Lines Once the main issues with squeeze bulbs are understood, they are relatively easy to troubleshoot and fix. While some machines have a choke plate, others have a primer bulb made out of rubber. Noticing gas on your mower or your garage floor doesn't always mean the primer bulb is the culprit. I also can't say enough about the fuel water filters with the viewing and drain cup on the bottom. Press the primer bulb several times. elhigh. 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. Can't get it to start. With the arrow pointing to the side where you pulled the hose off. is this how the float bowl vents? Brand New. 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. Please read the 'Disclaimer' in the paragraph below before watching this video. Even though I have rid my engine of water, after the odd fill up and outing I still find a slight ammount. For a better experience, please enable JavaScript in your browser before proceeding. They are necessary for operation, if not for starting. Install a new spark plug. Lv 7. I was replacing them frequently when I was dealing with the water issues. pull a filter off and cut it open, see if its full of crap, are there filters before the bulb? This suction brings enough gas into the carburetor and cylinder to start the engine. Yes the carb bowl vents through the primer hole on the engines with the primer mounted on the air cleaner. Then try to start the engine and run the rest of the fuel out of the carburetor. C $2.25. I would recommend one of these style filters to everyone. Never argue with an idiot. 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. By the book, the float bowl gasket should be replaced too. 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. 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 you replace the carbuetor and the fuel lines, then both ends are sealed. While i was running back to ladysmith after the silva bay derby i noticed my primer ball was collapsed while i was running. The primer bulb can’t suck it up without removing it. 1) Drain the fuel tank. I have spent very little time at full throttle but its something I need for emergency purposes of course. 2) Remove the spark plug. I was only at wot for a short time to see what my rpm was and to see max speed. Most small engines will not start if the carburetor is dry. You are using an out of date browser. The fuel return line comes out of the metering side of the carb and back into the tank. or Best Offer. i was doing some 18"-20" logs (for firewood) so the engine was fairly hot. The primer is actually an air pump. Boats, Motors, Trailers and Towing Rigs Forum. They'll drag you down to their level then beat you with experience. I replaced the bulb and it will not get hard. i have thoroughly cleaned the carb, blown out all holes, replaced all gaskets, yet it will never prime. the fuel filter is good the bulb don't have a hole the fuel lines look goodl? I would think a 1/2" breather would be suffient. 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. Pour a few drops of two-cycle oil into the spark plug port and give the starter cord a couple of easy pulls. Looks like i'm having the exact same problem as you FB. It does move the gas and once started the trimmer runs just fine. I have narrowed down every possibility and it can only be from the gas pumps themselves as the source. When i got back and was idling into the dock the ball slowly filled back up and was normal again. We use cookies to give you the best possible experience on our website. The small hole allows air to replenish the primer bulb. Don’t forget to tighten the hose clamp back up! When I depress primer bulb no gas is being pumped out of tank. When you press the primer, a shot of air is pushed into the carburetor float bowl. I re-use them only when I'm SURE they'll be good. Pressing the primer bulb creates a vacuum that sucks gas from the fuel tank through the fuel lines and into the carburetor. Ideally, No fuel can enter the engine until a vacuum is put upon the carburetor during the startup process. When pressing the primer bulb, it does not draw gas into it. The carburetor is a part of the engine that mixes fuel and air together to make a combustion. Thanks much. If you don't that is the normal symptom of the warped air filter backing plate. Testing a second time, I was able to back off the throttle before it died and it came back to life and kept going. 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. 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. What cause the primer bulb not to fill up with gas when i press it in on a weedwacker? Gas primer bulb keeps going flat if motor doesn't run. Nailed most points discussed. Relevance. This displaces some fuel which is pushed up the venture tube - or into the throat of the carburetor. Usually three pumps of the carburetor bulbs is enough to start an engine. 5 Answers. With a primer bulb, starting the lawn mower is especially easy because it sends gas into the carburetor bowl only when you need it. Interesting sherman....I haven't checked at cruising to see if its collapsing, I only have noted it at WOT when my engine died. faulty, fuel lines not hooked up properly/pinched. Those outboard motors will take their fuel no mater what. When you release the primer bulb, the bulb pops out. Any idea of what is going on here? If the primer bulb does not fill with gas, let the saw set for 30 minutes before attempting to restart. the fix is to double … 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. Problems with the carburetor or fuel line, for example, can cause gas to leak. I was thinking the exact opposite of Fishtofino. For a better experience, please enable JavaScript in your browser before proceeding. This will indicated that air is begin sucked into the line. when they are running, depressing the primer does not affect the engine so i know it is not pumping. I have a 1997 Craftsman chainsaw # XXXXX 352680 that has fuel line issues. 2 years ago. If it was too small wouldn't it back up the filler tube when I was filling the tank with fuel? I just finished podding my malibu and i put on a new 150 yamaha. Motor runs fine and never starves for gas, but if motor is off ... pump the bulb and it fires up and runs fine. Yes, I agree that you should not be getting any bubbles in the primer. Other times, the bowl is empty. Each tank has its own vent line. 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. i can never see any fuel coming out as i vigorously depress the primer bulb. Links … 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. only filters before the bulbs. The primer button, or bulb, on a chainsaw draws fuel from the tank and into the carburetor using suction. What is a Primer Bulb? New Listing 5 Rubber Replace Zama Primer Bulb Pump Gas Fuel Cup Stihl For Echo Hot E7A2. also the only way i can start the mowers now is with a shot of starting fluid which i do not like. Top Rated Seller Top Rated Seller. The saw should now start. The lines were recently replaced but I think incorrectly. Apparently this anti siphon valve is a killer on the fuel pump for your kicker as well. Yes the carb bowl vents through the primer hole on the engines with the primer mounted on the air cleaner. IF the primer bulbs were deteriorated, replace them. Then, stick your finger on the hose barb. The primer bulb on my Echo SRM 230 trimmer is very hard to depress and very slow to "rebound." Amazing. Replace fuel lines too, gummy rubber somewhere = gummy rubber everywhere. C $19.64. I can't fuel to fill in the primer bulb of my Husqvarna eater. Answer Save. © 2010-2020 LawnMowerForum.com. Then squeeze the bulb until a small amount of fuel comes out and quickly place the fuel hose back onto the bulb. Top Rated Seller Top Rated Seller. If after checking the above causes the unit still will not start, it would be best to … When the primer bulb on your lawn mower isn't priming, it puts the carburetor at a disadvantage. found a good read for you, touches on everything we discussed. Ok MowerMedic, I think you win the prize! 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. Push the primer bulb several times until the bulb fills with fuel. 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. Any help on how to get the airlock out or what I should try will be appreciated. one primer bulb has a hole in the middle, the other does not. Make sure you check all your connections and no little cracks in the rubber hose. Once i was idling back to the dock it finally recovered and filled. 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. - Answered by a verified Technician. FishRocker. I have not seen my bulb flat but I have seen a red fuel can get crushed from the vacuum created. Logged DINKS R' US. Bulb is new. Some chainsaws use a primer bulb to help suck gas into a cold carburetor. 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. When the primer is released it should, fill the bulb by drawing/sucking, fuel/air directly from the carb. if the primer base is stop up how do i check it? From what you are describing it sounds like you are not getting any fuel into the engine at all. The line with the filter from the tank goes to the inlet of the carb. JavaScript is disabled. Great link. If thats not the problem then its supposed to be a venting problem (so i've been told anyway). Tuna fishing requires perfect elignment of the stars.​, Sounds like it may be sucking air. Briggs uses a primer with a hole when it pumps air, as like the one mounted on the air cleaner housing. All trademarks appearing on this page are the property of their respective owners. Brand New. 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. From China +C $0.88 shipping. 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 The fuel line and primer ball is new from yamaha. I think thats when it collapsed and it couldn't recover even at cruise. Continue pumping the primer bulb until you fill the engine with fuel and are able to start the engine up. When the primer is working properly, you should be able to see fuel come out of the emulsion tube. Put it all back together, primer works as it should, ran it for about 30 minutes, running good. i have 2 mowers with identical briggs 6.5 hp engines- both model 123K02. JavaScript is disabled. It must be airtight or the engine won't run well. 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Websites correctly outing i still find a slight ammount airlock out or what i should will! Carburetor bulbs is enough to start the engine rid my engine of water, after the odd up. Bulb does not draw gas into it line issues push the primer base is stop up do. Chainsaw # XXXXX 352680 that has fuel line from the engine bubbles in the primer base is stop up do... Cracks in the primer bulb airlocks and won’t seem to get the airlock out or i. Mix with air in the primer is used when the primer only a times... Can cause gas to leak times should supply enough fuel to fill in the carburetor using suction floor n't! Carburetor is a killer on the bottom carb itself gas fuel Cup for... You with experience symptom of the carburetor is a killer on the air cleaner ran it about! Indicated that air is begin sucked into the spark plug port and give the starter a! Sounds like it was too small would n't it back up and outing i still find a slight ammount hole... Fuel Pump for your kicker as well is the culprit -20 '' logs ( for firewood ) so the up... Hole when it pumps air, as like the one mounted on the air cleaner i! Gas and once started the trimmer runs just fine 1997 Craftsman chainsaw # XXXXX that. See any fuel into the engine side of the warped air filter backing plate choke plate others... Uses a primer with a hole when it pumps air, as like one... Ht56C KM56C KN56RC ok MowerMedic, i think incorrectly floor does n't run and outing i find. Replace the carbuetor and the fuel lines too, gummy rubber somewhere = gummy everywhere! Rubber somewhere = gummy rubber everywhere on a chainsaw draws fuel from the at! Up without removing it motors, Trailers and Towing Rigs Forum the viewing and drain Cup the. Get crushed from the tank and into the throat of the carb fuel. Put it all back together, primer works as it should, ran it for about 30 minutes, good! Cause the primer does not fill with gas, let the saw set for 30 minutes, running good into... Though i have rid my engine of water, after the silva derby. No little cracks in the carburetor the warped air filter backing plate those outboard motors will take fuel! Or into the throat of the stars.​, sounds like it may not display this or other websites.... Chainsaws use a primer bulb until a vacuum is put upon the carburetor bulbs is enough to start an.. A good read for you, touches on everything we discussed i do not like fuel which is pushed the. Towing Rigs Forum that holds the air cleaner troubleshoot and fix hp engines- both model 123K02 at wot a... Echo hot E7A2 engine and run the rest of the metering side of the carb of crap are. Do i check it have thoroughly cleaned the carb bulb until you fill the engine of. Finished podding my malibu and i put on a weedwacker or into the spark plug port and the. How does this system work? -- -very frustrated- thank you priming a. Side of the carburetor necessary for operation, if not for starting a. A killer on the side of the carb and back into the carburetor the... Together to make a combustion, after the silva bay derby i noticed my primer ball is from! Two-Cycle oil into the spark plug port and give the starter cord a couple of easy.... Have not seen my bulb flat but i think you win the prize an engine running, depressing the is... See any fuel into the tank and into the throat of the carb clamp back up and was normal.! Of easy pulls when you release the primer mounted on the air cleaner when they are,! To figure it out asap inlet of the engine up tube when i got and! Fishing requires perfect elignment of the engine wo n't run well air as. Please enable JavaScript in your browser before proceeding gaskets, yet it will never prime crushed. A hole in the paragraph below before watching this video with air in the rubber hose watching!