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Next make sure you. When the primer bulb isnt working it may be a problem with the bulb itself with the fuel lines that feed fuel to the bulb or both.
From what it sounds you have a failed or sticking check valve in the primer base assembly below the bulb.
Primer bulb won t fill with gas. How to fix a primer bulb that wont prime and fill with gas small carburetor small carb. Blower lawn mower weed eater trimmer. Yard machine snow blower wont run.
9 or 10 presses on the primer bulb will get it to run until the gas runs out. This blower sat at least this summer with gas in the tank plus the gas. If you are pressing the primer bulb and it returns to the original position but does not draw up gas into the fuel line then you probably have an air leak in the intake line.
The reason could be that the fuel line is the wrong size and is not fitting tightly enough or that the line with the filter isnt submerged in the gasoline in the tank. If the fuel is not being pumped out of the tank either the problem is the fuel lines are not connected correctly or the carburetor has an internal problem. The small fuel line that has the fuel connected to it in the fuel tank should connect to the carburetor.
Then the larger line from the carburetor should connect to the short port on the primer. With the carb assembled if it doesnt pick up fuel it may be because the screen filter in the carb body is clogged a fuel line is cracked or the filter is plugged up. It could also be that it has a check valve in the throat of the carb that is leaking air.
The primer bulb sits in the middle of this return line on most chainsaws. 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 older up to late 1980s early 1990s equipment had actual Primer bulbs exactly as AJP described.
You push the bulb and fuel squirts into the venturi. It is easy to flood the units. If you have this system you may or may not have fuel in the bulb.
The newer mid 1990s and newer equipment actually has a Purge Primer bulb. Unable to prime-bulb wont firm up To troubleshoot you may try placing the origin end of the fuel line removed from the fuel tank into a can of fuel and place the destination end of the fuel line removed from the fuel pump into an empty can and see what happens when you squeeze the bulb. No it still wont pull gas to primer bulb.
The primer bulb circulates the fuel through the fuel lines and back to the fuel tank. The purpose of the primer is to put fresh fuel in the fuel lines and remove any air that is in the lines. This will help in locating the parts on the product.
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. Faulty fuel lines not hooked up properlypinched. Links below may help trouble shoot your issue including manual.
Primer bulb wont stay hard ie fuel line problem David Jenkins. Posted 06-11-2003 0829 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. Then today after the boat had been sitting un-used for 24 hours again I felt the.
The primer bulb sucks air from the carb and sends it to the petrol tank. Its job is not to pump gas but to purge the system of air. Firstly check your fuel filter you should be able to blow gently through it and hear the air bubbling in the fuel tank.
Next make sure you. Ideally No fuel can enter the engine until a vacuum is put upon the carburetor during the startup process. From what it sounds you have a failed or sticking check valve in the primer base assembly below the bulb.
The symptoms are it just wont draw fuel. Furthermore why does my primer bulb not work. When the primer bulb isnt working it may be a problem with the bulb itself with the fuel lines that feed fuel to the bulb or both.
The same goes for fuel lines. When theyve hardened and cracked they let in air which makes it impossible to draw the fuel into the carburetor properly. How To Prime Up Fuel When Primer Bulb is Air Locked.
Another thing to know about primer bulbs is that if the fuel leaks to far back into the tank. The primer bulb cant suck it up without removing it. If the primer bulb airlocks and wont seem to get any fuel.
Disconnect the fuel line from the engine side of the bulb. In most cases when a primer wont fill there is crap in the fuel system - clogged filter in tank clogged inlet screen in carb or stuck inlet needle valve. Or just heavy corrosion in the carb.
Fuel pump diaphragm check valve flap valve could also provide that symptom. Aug 1 2007. Primer ball wont get hard.
Yesyou need to take the fuel line off the ball so you can put your finger on the engine end of the ballthe side the arrow points todo it til you get a good shot of gas outbe carefulyou can use a small length of hose to do whatever works and is safeas mentioned by many alreadysome of. Clean Gas Tank. When the primer wont hold fuel in the bulb something is either blocking the flow of fuel or air.
Most likely the gas is getting blocked at the source. When you take the fuel cap off for refueling grass dirt and other debris can fall into the tank.