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Primer bulb will not refill.no jet of fuel into carb when pushed

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Hi,
Usually when that happens, it is because of a small crack either in the bulb or the tubes from the gas tank.... the tubes can even break off inside the gas tank...
Check all the plastic tubes and the bulb for any cracks and that they are intact...

heatman101

Posted on May 24, 2011

Testimonial: "Thanks. I had already replaced the broken fuel lines as well as the fuel filter. I blew out the carburetor screen as well."

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I have a pro mac 2000 strimmer that will only fire if I pour fuel into the spark plug, not sure if the high and low mixture screws have been altered, help me pls thx Brian

Posted on May 25, 2011

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1 Answer

I cant get it to start. The primer bulb wont refill with gas


The bulb pulls fuel from the carb into the bulb and back to the tank, if the bulb does not fill it is because there is a fuel blockage, either in the fuel filter in the tank, or the screen in the carb itself.

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I have a yard machine mower model number 11A-549R729 that will not stay running. Have replace plug,drain fuel tank and clean carb. If you push the primer bulb it will continue to run. But once you stop...


Your carbs main jet is blocked. Using the primer supplements the fuel input and keeps the engine from becoming fuel starved.

You need to remove the main jet and run a strand of fine wire through the jet to clear it.

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Need to know how to connect the gas lines from the primer bulb to the carburetor on a poulan woodshark model 1950 chainsaw


The lines should be connected to push fuel into the carburetor. The output (overflow) of the carb is routed back into the tank. So, two lines in the tank, one is an overflow (return) and the other is the suction. On the primer one line from the tank and the other to the carb. Connect so as to "push" fuel into the carb when the primer bulb is pushed.

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1 Answer

Cratsman 40cc chainsaw will not run. i get it started and pull the throttle open and it wants to die, sounds like it starves for fuel. put new line from tank to carb, blew out carb, dont no settings for...


A quick test to see if it's running too lean (starved for fuel) is to gently push the primer bulb. If the motor spins up (revs), it's likely a clogged high speed jet. If it stalls immediately, then it's running too rich and you need to cut back on the high jet.

See http://www.repairfaq.org/samnew/lmfaq/lmadjc.htm for some quick and dirty (but good) instructions on adjusting the jets to fine-tune your engine.

As for the primer tube, if the bulb pulls fuel and fills up when pumped 3-8 times, then things are fine. If the bulb never gets fuel, then you may have identified a potential cause (missing tube).

Jun 01, 2010 | Garden

2 Answers

Ryobi Leaf Blower


yes,,,,its a dirty carb jet or a blocked carb jet strip the carb and blow out all the running jets,dont go poking wire into any of the jets to clean them this could bistroy the jet/s

May 08, 2010 | Ryobi Snap In Primer Bulb Pump 683974 ...

1 Answer

String trimmer won't start. How do I flush the


To flush system
Drain tank, use primer bulb to push out fuel in the lines, refill, use primer to bring in fresh fuel. You may need to pull the rope a few times with the choke on, and then push the primer several times again. Sometimes you may need to put a few drops of fuel into the throat of the carburetor to help it start to fire.
If the problem is severe enough, you may need to remove the carb to disassemble and clean. I have listed a few things to check.


Fuel starvation - 'lean fuel' condition
Basic things to check:
1) spark plug
2) spark arrestor in muffler
3) fuel lines and tank filter
4) turn adjustment needles out (counterclockwise) 1/4 to 1/2 turn
Chain Saws:
5) check impulse tube and intake boot for cracks or leaks
*if all of the above are OK and/or do not improve performance then:
Remove Carburetor
6) replace gaskets/diaphragms
a) use a spray carb cleaner to clean jets, holes, and body of carb
b) fuel pump diaphragm goes against the carb body,
then the gasket towards the outside
c) metering gasket goes against the carb body,
and the diaphragm goes towards the outside

Nov 12, 2009 | Homelite Mighty Lite Lawn Trimmer

1 Answer

I have an echo C8 345 that will not run more than 5 secs. when you push the primer bulb and fill the carb, it will run until that is used up and quit. i took the fuel line off at the carb and gas runs out...


If pushing the bulb feeds fuel to the carburetor it isn't conneced properly.
EchoUSA
http://www.echo-usa.com/pdf/documentation/CS300_100605.pdf
  1. The filtered hose from the fuel tank connects directly to the carburetor input connection.
  2. The output line from the carburetor connects to the suction side of the primer bulb (once bulb is collapsed it draws fuel from the tank through the carburetor to refill the bulb as the bulb reinflates).
  3. The pressure side of the primer returns any excess fuel to the tank as it is depressed.
HTH
Lou

Oct 24, 2009 | Echo Garden

1 Answer

Must keep pushing primer bulb to keep mower running, need manual


The main suction jet in your carb. is blocked.Remove the bowl and push a thin needle up the centre jet in the carb and blow the jet out with compressed air. Stephen.

Sep 22, 2009 | Briggs & Stratton Garden

1 Answer

Problem with primer bulb


Reverse the line connections at the primer bulb. Look carefully, the long port has the line going to the tank, the short port on the bulb will connect with the fuel line to the carb.

Sep 05, 2009 | Craftsman 25cc Gas Line Trimmer

3 Answers

Craftsman leaf blower, primer bulb will not return, won't start


primer bulb on weedeater will not return to normal or **** gas into it. new primer bulb. lines to tank have been repalce and can blow through them but primer bulb will not push air into tank

Apr 22, 2009 | Craftsman Garden

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