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

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