It sounds like the bulb is pulling against a vacuum, so there is a restriction in the fuel path from the tank to the carb. Still no go. The bulbs will not stay "hard" with fuel if the engines are running. Pump the bulb until it is firm to the touch. Your saw has a WT-589A carburetor and takes a D10-WAT G&D kit. Does the bulb stay full and ... My thinking is if the fuel pump was not working it would not suck gas. 06-17-2012, 05:02 PM. 06-24-2013, 07:37 PM. Topic: Primer bulb won't stay hard (i.e., fuel line problem) David Jenkins: posted 06-11-2003 08:29 PM ET (US) Yesterday, while working on the boat in the driveway, I noticed that the primer bulb was not hard so I squeezed it a few times to fill it with fuel. To remove the old primer bulb from the mount ring, the tabs that hold it in place must be squeezed while the bulb is pulled away from the ring. Could be the fuel filter. Want Answer 0. I replace the entire fuel line with an Atwood line with primer bulb and installed an Atwood inline fuel filter just after the tank. is this how the float bowl vents? It sounds like the bulb is pulling against a vacuum, so there is a restriction in the fuel path from the tank to the carb. It does move the gas and once started the trimmer runs just fine. Now the engine cranks, idles like a charm and runs fine up to about 2000 RPM’s….. beyond that it simply is not getting the gas it needs. Those are the cause of 87% of problems. Please read the 'Disclaimer' in the paragraph below before watching this video. I didn't realize that there was a check valve and that it could affect it after it started.. When the primer bulb on your lawn mower isn't priming, it puts the carburetor at a disadvantage. Thank you for your help. I added a small fuel pump from autozone to send more fuel under pressure. Just keep pushing the primer til it starts to get hard to push.If it starts and then stalls just push it a few more times and it should be good.Hope this helps.Good luck. I do not know where to go from here. Richard : When lines are removed ... one liine for the bubble to retract, there is blockage int he fuel system. There is a new primer bulb coming in the kit I … Could be the check valve, or the screen inside the carb is clogged (if it has one). hope this helps. Ok MowerMedic, I think you win the prize! I have installed primers in both locations with no issues. I replaced the bulb, replaced the primer button assy, don't know what else. The fuel lines need checked, if theere nto hard, they need flushed, the fuel filter needs ... when I push the primer bulb, should gas be … Don't remember if I changed fuel filter then, but it's been my grab and use saw for several years now! Trying to fix a 2 cycle grass trimmer/edger. Air and fuel should leak out as you pump. 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. Didn't have a lot of time to work on it but I managed to rule these out--since I work on equipment part time, I try to always have spare filters, line, and primers on hand. I test purge bulbs using the same concept as that suction device found in snake bit kits. One shows the primer bulb pushed and the red is … Check valves are non-serviceable and replacement of the valve body is the only fix. Don't know much about small engines. June 25th, 2013. You may also visit the Boat Motor Manuals section of our site to obtain a service manual. If not, the bulb may be damaged. Usually a gasket or diaphragm gets damaged during carburetor dis-assembly so have a kit ready to go if you open the carburetor. 0 votes Allen, I am glad to hear you have the unit up and running. If the primer bulb is held horizontally. You should never need to use the primer bulb unless you run the fuel tank dry or let the boat sit up several months. How Primer Bulbs Work What is a Primer Bulb? i can never see any fuel coming out as i vigorously depress the primer bulb. Then squeeze the primer bulb and before releasing it, place your finger over the barb where you removed the fuel hose from. Sequoiha. It will not stay "hard" while operating but if you can pump for that long then best replace the bulb with a genuine one-not a cheap aftermarket one-they cause more problems then they are worth. Primer bulb on 200 Yamaha wont get hard - Answered by a verified Marine Mechanic We use cookies to give you the best possible experience on our website. New of these 3 didn't change anything. 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. The engine starts is hard to start has no hole shot and sometimes stumbles. So I’m assuming a new hose and primer bulb should ... and bits of the fuel line fell out. It fixed mine and I didnt have to take the cab off. Saw has never been in wood and diaphram and fuel line were hard. 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. Order Primer Bulbs for your vehicle and pick it up in store—make your purchase, find a store near you, and get directions. If they are collapsing while running, there is a restriction in the fuel system before that primer bulb somwhere, or the vent on the tank is clogged. In your browser before proceeding before starting will deliver the fuel line with primer bulb won. 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