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My primer bulb keeps colapsing shut like something is resticting the fuel flow.what could the problem be?Thanks

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  • Anonymous Mar 12, 2014

    problem with idle, not keeping prime. motor want to shut down. new tank, new water seperator, new primer bulb , pre-mix in tank vro not connected at harness.

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You have junk at the pickup end of the fuel line or the strainer is full of junk.

Posted on Apr 19, 2009

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Primer . that is a filter /weight to keep it in fuel and no s will not effect flow

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Primer bulb not pumping fuel into carb, pull it out, no splits etc. Once I get fuel in it starts and runs fine??


Probably a valve in the priming system is stuck. It allows fuel to flow into the bulb from the tank, the valve should close then and allow the bulb pressure to spray into the carburetor. Could also be the opening into the carburetor from the prime bulb is blocked.

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No, it is a return line to the tank from the primer. It sounds like the hoses are reversed. The fuel should flow from the tank via the main fuel line (with the filter)( sometimes the main line is smaller than the return line) to the carb, fills the carb then to the primer bulb, and from the primer bulb back to the tank. With just enough fuel in the tank to cover the fuel filter start pressing the primer bulb. Check for fuel coming out the short hose into the tank. If instead the bubbles come out the filter and the primer goes dry try reversing the lines at the carb and/or the primer bulb and try again until you get the proper flow pattern.

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My TB70SS Bronco weed eater primer bulb will not return when pushed, thus will not run.


something is plugging the fuel flow from tank. the primer is actually as far a fuel flow goes is after the carb. fuel goes from tank to carb to primer and back to tank. could be fuel filter gummed up or plugged. take off line coming from tank filter to carb and see if it pushes in and pops back out. if so its your fuel filter.if it still does it something is plugged in carb. there are little flapper valves in primers to allow fuel in and push fuel out. could be one of those gummed shut. all depends on it has the primer blb on carb or seperate place as to how well you can see where the problem lies.

Aug 09, 2011 | Troy-Bilt Garden

1 Answer

I have a 22 inch self propelled recycler that will idle for hours,but as soon as you engage the self propel and start mowing it stops after 5 minutes.


This sounds like fuel starvation. This is usually caused by debris in the fuel float bowl or a dirty fuel filter (if used). Remove the fuel float bowl and clean out the debris. With the bowl removed use a spray paint can lid as a catch pan and check fuel flow. With the float down it should fill the spray paint can lid in about 10 seconds. If you do not have this much fuel flow you need to inspect the tank outlet port, fuel lines and filter (if used).
The 20029 & 20099 models came with either a Briggs & Stratton or Kohler Courage XT7 engine. I need to know what engine you have to provide any diagrams on what to check or clean. A n engine model number would be even better. (Please!) Since the post is labeled with the 20099 model I will cite that as a reference. This SERVICE manual should help you with repairs:
http://www.kohlerengines.com/onlinecatalog/pdf/tp2601_308.pdf

See page 27 of the manual for fuel filter location. (Optional if used) AN exploded view is on page 31.

If you have the primer bulb model see page 24 and note the ondition of the primer bulb and primer bulb hose. Any hole in the primer bulb or cracks in the primer bulb hose can also cause this symptom.

If you have the Briggs and Stratton engine (Model 20029) I need the engine number to get you the correct manual data please. Otherwise...this should help you resolve the problem.
Thanks for choosing FixYa,
Kelly

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1 Answer

Took carb apart and clean then put back together with new gaskets. will not start without starter fluid and only for 2 secs then dies will not start on its on has new spark plug and gas line with fresh...


Lets back up and regroup on the carb work:

Hi and welcome to FixYa. I am Kelly.
This is how to clean the fuel passages in the carb.
Here is what you need to do:

1. Fuel selector off
2. Remove float bowl mounting screws and nut
3. Remove the BRASS Jet / Orifice in the very bottom of the venturi tube inside the pickup tube. (Flat blade screwdriver) Hold the Orifice up to the light. You should see a pinhole. If it is not clear clean the orifice but do not force anything through the hole.
4. Underneath the Orifice there is yet another BRASS tube that you need to remove. (Flat blade screwdriver) Make sure all of the holes in the tube are clear. The tube will be over 2 inches long. Clean it and reinstall it.
5. Reinstall the Orifice.
6. Using a catch fuel container turn on the fuel selector. Fuel should flow at a good rate. GENTLY lift the float assy level and make sure fuel flow shuts off. When you drop the float again fuel should flow.
If you do not have fuel flow at this point the needle and seat will need to be inspected. Fuel selector OFF.
(The following procedure is to be done only if there is no fuel flow with fuel selector on.)
a. Remove the silver float pivot pin retaining screw
b. Drop the Float down (The needle will come off with the float. NOTE the position)
c. Inspect the tapered rubber of the needle If should be pointed. If it is not pointed then the rubber tip is stuck inside the seat.
d. Clean the seat hole ONLY if obstructed. (Easily damaged)
e. FUEL Selector on then off fuel should rapidly flow through the needle seat.
f. Renistall Float and needle making sure to get the pivot / hinge pin installed correctly and reinstall the silver retaining screw.
g. Fuel selector ON. Raise and lower float checking for free movement and fuel flow.

7. If there still is no fuel flow at this point remove the fuel hose from the carb and check fuel flow. If no flow check that gas tank exit hole, fuel filter (if installed) and the selector valve assy for obstructions. Reassemble connections.

FUEL FLOW IS GOOD

8. BEFORE you install the float bowl inspect the bowl nut. There are 2 holes in the side of the nut where it screws in to the bottom of the carb that must be clear.

9. Install Float bowl mounting screws and nut. Check for leaks.

10. Test engine.

That should do it. (carb cleaning 101)

Thanks for using FixYa.

Kelly
P.S. If it still does not start and you have a primer bulb on the carb the primer bulb most likely has a hole in it. Press and hold the primer bulb CLOSED against the carb inner mating surfaces and see if it will start. (2 people required) If it starts and runs the primer bulb has a pin hole in it.

Apr 12, 2010 | Toro Lawn Mower With Toro Power Tools

1 Answer

Toro mower starts after priming dies right away


Hi and welcome to FixYa. I am Kelly.
This is how to clean the fuel passages in the carb.
Here is what you need to do:

1. Fuel selector off
2. Remove float bowl mounting screws and nut
3. Remove the BRASS Jet / Orifice in the very bottom of the venturi tube inside the pickup tube. (Flat blade screwdriver) Hold the Orifice up to the light. You should see a pinhole. If it is not clear clean the orifice but do not force anything through the hole.
4. Underneath the Orifice there is yet another BRASS tube that you need to remove. (Flat blade screwdriver) Make sure all of the holes in the tube are clear. The tube will be over 2 inches long. Clean it and reinstall it.
5. Reinstall the Orifice.
6. Using a catch fuel container turn on the fuel selector. Fuel should flow at a good rate. GENTLY lift the float assy level and make sure fuel flow shuts off. When you drop the float again fuel should flow.
If you do not have fuel flow at this point the needle and seat will need to be inspected. Fuel selector OFF.
(The following procedure is to be done only if there is no fuel flow with fuel selector on.)
a. Remove the silver float pivot pin retaining screw
b. Drop the Float down (The needle will come off with the float. NOTE the position)
c. Inspect the tapered rubber of the needle If should be pointed. If it is not pointed then the rubber tip is stuck inside the seat.
d. Clean the seat hole ONLY if obstructed. (Easily damaged)
e. FUEL Selector on then off fuel should rapidly flow through the needle seat.
f. Renistall Float and needle making sure to get the pivot / hinge pin installed correctly and reinstall the silver retaining screw.
g. Fuel selector ON. Raise and lower float checking for free movement and fuel flow.

7. If there still is no fuel flow at this point remove the fuel hose from the carb and check fuel flow. If no flow check that gas tank exit hole, fuel filter (if installed) and the selector valve assy for obstructions. Reassemble connections.

FUEL FLOW IS GOOD

8. BEFORE you install the float bowl inspect the bowl nut. There are 2 holes in the side of the nut where it screws in to the bottom of the carb that must be clear.

9. Install Float bowl mounting screws and nut. Check for leaks.

10. Test engine.

That should do it. (carb cleaning 101)

Thanks for using FixYa.

Kelly

P.S. If it still does not start and you have a primer bulb on the carb the primer bulb most likely has a hole in it. Press and hold the primer bulb CLOSED against the carb inner mating surfaces and see if it will start. (2 people required) If it starts and runs the primer bulb has a pin hole in it.

Apr 09, 2010 | Toro Lawn Mower With Toro Power Tools

1 Answer

What direction does the fuel flow into a weedeater primer bulb?


The fuel will flow from the fuel tank to the carb, after going thru the primer bulb, it will fill the carb with fuel and then be shut off after the float in the carb shuts off the fuel flow from the primer bulb.
Hope this helps,
Good Luck,
Please rate me....
Thanks

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2 Answers

Model 2175 poulan - pump up primer bulb and it colapses. When i put fuel in head it runs till gone..


Change out the primer bulb and the small gas lines going to carb and primer. One of these has a small crack to let air get by and this is how you get a flat primer bulb. Pick the kit up at lowes for $6-8.

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