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Where is the vacuum hose attached on a J.D. GX-345

Fuel pump will not pull gas from the tank. I took off the fuel line, poured some gas into the line added a little pressure and the engine started/. I think the vacuum hose has a leak but I only see it attached to the engine block?

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  • 2,239 Answers

This type of pump takes a pulse from the engine as the piston rises and falls, this is fed to a diaphram in the pump which then pulsates and pumps the fuel, if there is a loose or cracked pipe it will not work, if the diaphram is split or has hardened you will need to replace the pump as it is not sevicable.

Posted on Jul 25, 2013

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6 Suggested Answers

6ya6ya
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Posted on Jan 02, 2017

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redbeard00
  • 957 Answers

SOURCE: Occasionaly the engine shuts off and won't start on JD gx345.

If the fuel pump is working correctly then the problem is between the tank and the pump. run a fuel line from the pump to a gas can. If the pump is working it will siphon the fuel into your filter. If the pump is fine then there is blockage, broken fuel line (sucking air), or something blocking the pick up inside the tank.

Posted on May 23, 2009

  • 25 Answers

SOURCE: briggs and statton carb pouring fuel out

Could you have possibly lost a plug in the carb ?

Posted on Jun 23, 2009

  • 218 Answers

SOURCE: Mower won't start

Hi..my name is Keith and some mowers do have a fuel pump..if the fuel tank is lower than the carb...and they are operated by vacuum thats created in the crankcase and they are usually located on the carb...but i would check to see if some trash didnt stop up your fuel line..also..if you have old gas in it..a lawn mower engine doesnt or wont run on it..i hope this has helped..if not..write me back

Posted on Jul 01, 2009

  • 218 Answers

SOURCE: Engine stalls after 45 minutes?

Hi..my name is Keith...i would suspect either the fuel cap isnt venting..or if you have a fuel pump..that it is bad..i hope this will help..if not please write back

Posted on Jul 09, 2009

  • 13 Answers

SOURCE: I have a John Deere GX345 with a Kawasaki liquid

Sounds like you may have a problem with Choke adjustment, or perhaps a broken choke cable. Do you have a workshop manual?

Posted on Oct 25, 2010

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How to change a fuel pump on a 1992 Toyota carolla


Electric Fuel Pump-Fuel Injected REMOVAL & INSTALLATION The electric fuel pump is contained within the fuel tank. On 1988-92 models, it is necessary to remove the fuel tank from the vehicle in order to reach the pump. On 1993-97 models, the fuel pump can be accessed by removing the rear seat cushion and service hole cover. 1988-92 Models Fig. 1: Exploded view of the electric fuel pump 88275g77.gif
NOTE: Before disconnecting fuel system lines, clean the fittings with a spray-type engine cleaner. Follow the instructions on the cleaner. Do not soak fuel system parts in liquid cleaning solvent. CAUTION
The fuel injection system is under pressure. Release pressure slowly and contain spillage. Observe "no smoking/no open flame'' precautions. Have a Class B-C (dry powder) fire extinguisher within arm's reach at all times.
  1. Disconnect the negative battery cable and relieve the fuel pressure. Remove the filler cap.
  2. Remove the fuel tank from the vehicle.
  3. Remove the fuel pump bracket attaching screws, then remove the fuel pump/bracket assembly from the tank. Fig. 2: Remove the bolts retaining the pump bracket to the fuel tank 88275g78.gif

  4. Pull the lower side of the fuel pump from the bracket.
  5. Remove the nuts attaching the wires to the fuel pump.
  6. Disconnect the hose from the pump.
  7. Separate the filter from the pump. Use a small screwdriver to remove the attaching clip. Fig. 3: Pull off the lower portion of the pump from the bracket 88275g79.gif
    Fig. 4: If necessary, remove the clip and pull out the filter to replace it 88275g80.gif

  8. While the tank is out and disassembled, inspect it for any signs of rust, leakage or metal damage. If any problem is found, replace the tank.
  9. Inspect all of the lines, hoses and fittings for any sign of corrosion, wear or damage to the surfaces. Check the pump outlet hose and the filter for restrictions.
  10. When reassembling, ALWAYS replace the sealing gaskets with new ones. Also replace any rubber parts showing any sign of deterioration. To install:
  11. Install the pump filter using a new clip. Install the rubber cushion under the filter.
  12. Connect the outlet hose to the pump, then attach the pump to the bracket.
  13. Connect the wires to the fuel pump with the nuts.
  14. Install the fuel pump and bracket assembly onto the tank. Use new gaskets.
  15. Install the fuel tank.
  16. Start the engine and check carefully for any sign of leakage around the tank and lines. Road test the vehicle for proper operation.
1993-97 Models CAUTION
The fuel injection system is under pressure. Release pressure slowly and contain spillage. Observe no smoking/no open flame precautions. Have a Class B-C (dry powder) fire extinguisher within arm's reach at all times. Fig. 5: Exploded view of the fuel pump components 88275g81.gif
  1. Disconnect the negative battery cable. CAUTION
    On models with an airbag, wait at least 90 seconds from the time that the ignition switch is turned to the LOCK position and the battery is disconnected before performing any further work. Refer to Section 7 for all air bag warnings.
  2. Relieve the fuel pressure.
  3. Remove the rear seat cushion.
  4. Remove the floor service hole cover. Fig. 6: Remove the 4 service hole cover retaining screws 88275g82.gif

  5. Disconnect the electrical fuel pump wiring at the fuel pump assembly. Check for any fuel leakage while in there.
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  8. Remove the pump bracket attaching screws.
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  10. Remove the nut and spring washer, then disconnect the wires from the pump bracket.
  11. Remove the sending unit attaching screws, then remove the unit from the bracket. Fig. 8: Pull the pump bracket with pump attached from the tank 88275g84.gif

  12. Pull the lower side of the fuel pump from the bracket.
  13. Unplug the connector to the fuel pump.
  14. Disconnect the hose from the pump.
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  17. When reassembling, ALWAYS replace the sealing gaskets with new ones. Also replace any rubber parts showing any sign of deterioration. To install:
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  24. Install the service hole cover, then the engage the fuel pump and sending unit connector.
  25. Install the rear seat cushion.
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My briggs 12 hp runs when gas poured in carb but only 10 to 20 secs. there is some sort of module w/ 3 quarter inch rubber hose to it. does anyone know if this is essential to the running of the engine? i...


THe module with the 3 hoses, quarter inch each, is the fuel pump. Pull the fuel line off the carb and hold into empty can, crank the engine with the starter. If the fuel pump is good it will pump a stream of fuel into the can ( the stream will pulse as the pump works off of engine vacuum). Check the fuel you have caught in the can- is it stale or does it have water in it? If no fuel comes out then remove the fuel line from the tank to the pump and make sure you have fuel getting to the pump. The third line is the vacuum line from the valve cover and should not be an issue unless it is cracked and broken.
If the pump checks good and you are getting good fuel to the carb then rebuild carb.
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Hoggins12

I assume that you need to change the fuel pump. Before you do this loosen the gas cap and try to run the car. Cadillac and other new cars have a vacuum pump to pull vapors back to the engine. If that pump does not work the tank builds up a vacuum and the car will not KEEP running on the road. It could be the vaccum pump and not the fuel pump---Check the fuel pressure at the fuel rail. If you determine that the fuel pump is, indeed, the culprit; it is possible that the fuel can be sucked past the fuel pump. To do this; determine which is the line running to the fuel rails--it is about 5/16 " diameter/Black in color.

If you plan to cut this line to apply suction/pump--have a repair plan in place as these lines are NOT available even from Salvage yards.

Simple hose and clamps will not do it--they blow off on the road.

Glue---Sections of tight fitting over fitting hose and more glue---clamps--retaining wire---do it all !!!.

The tank can be dropped with a floor jack in the center of the tank---disconnect the holding straps from the back of the car--the tank will drop at the front enough to disconnect the various hoses from the pump/guages .--The fuel pump can be removed this way without taking the plastic fuel tank completely out or the gas out of the tank--------The front of the tank will slide down the straps and push to the back allowing work to be done. Get the car off the ground about 18 inches. DO NOT use and incandescant bulb for light as it can ignite gas fumes---Be concerned !!!

When you work on this problem---match mark everything including the hose routing to the tank--you might think that you will remember---but pulling th tank down again to reposition a hose route is a pain--been there---done that !!--best to use spray paint for hose routes. Be sure to mark the hose ends that go closest to the tank.

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I hope this helps--Rick

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