After this the bulb seemed to stay hard. The primer bulb fills and the trimmer starts up 2-3 pulls! The other line is just to pump the fuel back into the tank. That's what it had been doing when the engine would die after a few minutes. We occasionally have questions. Pressing the primer a few times before starting will deliver the fuel. Check valves are non-serviceable and replacement of the valve body is the only fix. Saw has never been in wood and diaphram and fuel line were hard. I don't condone parts replacement for the sake of parts replacement. The carburetor is a part of the engine that mixes fuel and air together to make a combustion. I replaced the bulb and it will not get hard. Installed carb kit and primer bulb wont pull fuel. one thing to check would be your primer ball. Blower, lawn mower, weed eater, trimmer Tags: None. I replaced the bulb and it will not get hard. 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. Comment . Those are the cause of 87% of problems. 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). 0 votes Allen, I am glad to hear you have the unit up and running. When you prime the primer bulb, the process works much better if you orient the primer bulb so that the arrow on it points skyward. Order Primer Bulbs for your vehicle and pick it up in store—make your purchase, find a store near you, and get directions. Even if it is a weak primer bulb, this shouldn't be the problem with running--it will start and run strong for just a few seconds (primer is not cracked and leaking). Could be the fuel line (collapsed or swelled shut). Any help on how to get the airlock out or what I should try will be appreciated. Echo switched from brass body check valves to nickel in an effort to reduce the chances of sticking. Material: Generally made of rubber or other flexible material. It does move the gas and once started the trimmer runs just fine. Clicking ... Could have a small crack in the primer bulb assembly above the fuel filter. Richard : When lines are removed ... one liine for the bubble to retract, there is blockage int he fuel system. I haven't had time to look at it, but I did notice the primer bulb was very, very slow to return each time it's pushed. 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. Check here for special coupons and promotions. The primer bulb wont stay hard as the fuel pump sucks fuel through the fuel line it has vacume in it and generaly takes a couple of pumps to make the bulb go hard this is normal...however if you have to keep priming the bulb for the engine to run the … Then squeeze the primer bulb and before releasing it, place your finger over the barb where you removed the fuel hose from. One shows the primer bulb pushed and the red is … (This is extremely important, DON’T hold the primer bulb horizontally.) Ok MowerMedic, I think you win the prize! Squeeze the fuel line clamps on the fuel hose coming from the fuel tank, at the fuel pump. A stuck or plugged check valve in the carburetor can cause the bulb to remain down or be slow to return. I have an Echo CS346 chainsaw that will start and run great just for a few seconds, then dies like the switch has been turned off. Does the bulb stay full and ... My thinking is if the fuel pump was not working it would not suck gas. i have thoroughly cleaned the carb, blown out all holes, replaced all gaskets, yet it will never prime. New of these 3 didn't change anything. 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. The next day we started it with the hose connected to the engine and it started after a few tries and it stayed running for the 5 seconds we had it on. 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 … Starts ok, idles ok, about 2,000 rpm and up misses, no fuel leaks that I can see no codes, primer bulb is solid, fuel filter clear with a small air bubble in it, it did this last year and the primer bulb didn't seem to stay hard, took it in and dealer said bad fuel but primer stayed solid when I got it back. If the primer bulb is held horizontally. 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. I think you may have it right about the primer bulb; it does drain, and it seems to take more pumping than it should. i have 2 mowers with identical briggs 6.5 hp engines- both model 123K02. Sequoiha. The inlet screen looked like it was covered with a "power fine" gray sludge. So we replaced the bulb to the old adage of eliminating the easy stuff first see any fuel out. You are invited to join our public Boat repair Forum to seek assistance from other.. Affect it after it started return line back into the tank and when i squish there. Store—Make your purchase, find a store near should primer bulb stay hard, and get.! Vigorously depress the primer is not Priming be able to get the primer not... Junky lowes special chainsaw with primer bulb no longer stayed hard so we replaced the primer vertically. 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