If you have this system you may or may not have fuel in the bulb. 10 years ago. Possibly a completely clogged fuel filter, a stuck primer bulb check valve, a stuck needle valve that controls fuel to the carburetor. I got a Atwood at first and it just didnt not have the quality and didnt hold the needed fuel pressure. This was a new tempo 28 gal tank. You push the bulb and fuel squirts into the venturi. You will need a long wing span or helper to quickly press the bulb before engine stalls. Answer Save. Try pumping the gas manually with the bulb as soon as you start the mower. This makes me believe that there is something clogged in the carb. I noticed that when I pump the Primer Bulb a couple of times, it stays depressed. I tried dissembling the carb. I shut it down, tried to restart by pressing the bulb down and it will not return. I am suspecting its the carbs diaphragm but dont see nothing too bad with it. Any suggestions? Both the manual choke system and the manual primer system engines may experience this similar symptom of running only when the fuel mixture is enriched. It had a couple small pieces of what looked to be silicone clogging the valve. Listen to engine and keep it running with primer for 15 to 20 seconds if it starts to stall press the primer … Then today, after … Relevance. Hello. When I disconnect the line from the carb to the bulb, the bulb fills up with air. The older (up to late 1980's/ early 1990's) equipment had actual Primer bulbs exactly as AJP described. Favorite Answer. Chainsaw poulan model 3314 the primer bulb wont press in. Purchased new primer bulb, does the same thing stays pushed in. If i press hard enough it will squirt gas back through the inlet port area. Traced it to the male quick disconnect on the fuel tank. The primer bulb shoots a small stream of gas right into the carb. It is easy to flood the units. 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. Fuel lines need to be replaced on a seasonal basis, or more frequently if it's used in dirty, dusty conditions. : It will definitely flood the engine if over used. I checked all the fuel lines and they seemed to be clear. Make sure to get a Mercury primer bulb!! Ret68. 10 Answers. The starting instructions says to slowly push it in 6 times but I can never get past 2 or 3. (still looks new) The problem is that I can't get it started and the primer bulb stays stuck in on the second or third push. The primer bulb is stuck down on my Troy-Bilt TB146 EC 4 cycle cultivator. Some engines utilize a manual fuel primer bulb to enrich the ratio of fuel in the fuel air mixture for initial engine starting. The primer bulb sits in the middle of this return line on most chainsaws. Primer bulb sticking on Poulan chainsaw, won't start. Re: Primer bulb doesnt stay hard I had the same issue,it was a bad primer bulb. Re: Primer Bulb Problems I just had the same problem. The newer (mid 1990's and newer) equipment actually has a "Purge" Primer bulb. When depressed the bulb sprays gas into the carb.--when released it sucks more fuel into the bulb. The flat primer bulb was the … After the engine is started the other line fuels the engine as it operates. Lv 6. Many string trimmers have Walbro carburetors. Machine will not start with bulb stuck in depressed position. It ran for about 1/2 tank of gas. Dirt and other fuel impurities may clog these hoses so an insufficient amount of fuel can pass through the hoses, causing the primer button not to fill. Nothing too bad with it re: primer bulb was the … I noticed that I! Was the … I noticed that when I pump the primer bulb,... 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