Carburetor has fuel not getting to cylinders - John Deere 3010,3020 Tractor Basic Carburetor Repair

Remove spark plug. If it's wet with fuel then likely it's flooded. Pinch off fuel line, dry out cylinder by pulling starter rope several times while spark plug removed. Dry and install spark plug.

If plug was dry or once you dryed cylinder and plug, set half throttle. Leave fuel line pinched off and spray a short 1 second burst of starter fluid directly into carburetor throat. Promptly pull starter rope up to three times.

If fire and runs for a second or two then spark is ok. If no fire, recheck for flooded cylinder. If not flooded, then no spark or low compression. Else release fuel line and attempt start. If no start or runs and stalls then likely it needs further carburetor work or bad fuel. Recheck for flooded cylinder.

Snowblowers typically dont have fuel filters. So of course the carburetor gets debris fouled and the repair shop puts in a inline filter.

The manufacturers dont like fuel filters for snowblowers because they can freeze if water is present. But I have a two strike rule. If a machine comes back more than once with debris in fuel, it gets a filter.

To check the filter (engine off and cool) disconnect the line on the carburetor side of the filter. Fuel should flow in a steady stream. If it drips, try a new filter.

If you have fuel up to the carburetor but no fuel in the cylinder (from carburetor) then likely the carburetor float is stuck. Especially if it sat for 10 months. You'll need to make sure fuel is filling the carburetor bowl. Loosen the carburetor bowl nut or remove nut and bowl. Fuel should flow steady from the inlet needle valve.

Tools required:

Allen wrench
7/16-inch socket driver
Needle-nose pliers
Approved fuel container
Scissors
Work gloves
Wire coat hanger
paper towels or shop rags
approx. 30 minutes

1. Drain the fuel tank

   Wear work gloves to protect your hands.
   In a well-ventilated area, remove the fuel cap and empty the fuel tank into an approved storage container.
   Open the fuel cap.
2. 02.

   Remove the cylinder shield

   
   Using an Allen wrench, remove the screws that hold the cylinder shield to the engine. Lift off the shield.
   Remove the cylinder shield.
3. 03.

   Disconnect the spark plug wire and remove the air filter

   
   Disconnect the wire from the spark plug. Pull the cover off the air filter housing and remove the filter.
   Disconnect the spark plug wire.
   Remove the air filter cover.
   Remove the air filter.
4. 04.

   Remove the fuel filter

   
   Straighten a piece of coat hanger and bend a hook on the end. Feed it through the mouth of the tank and fish out the white cylindrical fuel filter. Cut the fuel line to remove the filter.
5. 05.

   Remove the carburetor

   
   Using a 7/16-inch socket driver, remove the 2 mounting nuts that secure the carburetor to the engine.
   Pull the air filter housing off the carburetor.
   Pull the carburetor from the engine block, sliding it along the mounting studs. Be careful not to bend the throttle linkage or damage the gas lines
   
6. Remove the mounting nuts. Remove the air filter housing.
   Pull the carburetor off the mounting studs.
   
7. 06.

   Remove the old fuel lines

   
   Pull the fuel lines off the carburetor and primer bulb, using needle-nose pliers.
   Use needle-nose pliers to pull the fuel lines out of the gas tank.
   Tip: With some chainsaw models, you'll have to remove the screws from the primer bulb to detach the fuel lines.
   Pull the fuel lines off of the carburetor.
   Pull the fuel lines off of the primer bulb.
   Pull the fuel lines out of the gas tank.
   
8. 07.

   Install the new fuel lines

   
   Use a pair of scissors to cut the new fuel lines at an angle to thread them into the tank. Push the large line about 1 inch into the tank.
   Push the small line far enough into the tank so that it can be grabbed through the mouth of the tank with needle-nose pliers.
   Pull the small line out the mouth of the tank. Cut the end square and install the fuel filter. Pull the line back in so the filter rests on the bottom of the tank. Trim the fuel lines and connect them to the carburetor
9. .
10. Cut the end of the new fuel lines at an angle. Fuel line cut at an angle.
    
11. 08.

    Install the fuel filter

    
    Pull the small line out the mouth of the tank. Cut the end square and install the fuel filter. Pull the line back in so the filter rests on the bottom of the tank. Trim the fuel lines and connect them to the carburetor.
12. 09.

    Reinstall the carburetor

    
    Slip the carburetor onto the mounting studs and push it into place. Position the air filter housing on the protruding studs.
    Replace the mounting nuts and tighten them to seal the gasket between the engine and the carburetor.
    
    Tip: Avoid crimping the fuel lines when re-installing the carburetor.
13. 10.

    Reinstall the air filter cover and connect the spark plug

    
    Position the air filter in the housing and replace the cover. Reattach the spark plug wire.
14. 11.

    Reinstall the cylinder shield

    
    Reinstall the cylinder shield on the chainsaw.
    Refill the fuel tank.

Hi Chuck, It sounds to me as if the problem is too much fuel. The carburetor is allowing too much fuel into the cylinders and consequently there is too much to ignite. The repair means replacing or repairing the carbs. Regards John

.Fuel tank empty.
. Fuel cap or fuel tank not venting properly.
. Fuel filter clogged with rust or dirt.
. Fuel valve not in the on or reserve position.
. Vacuum line to fuel valve cracked, broken, pinched, or missing.
. Fuel valve/petcock clogged or diaphragm cracked, cut or torn.
. Fuel line from the fuel valve to the carburetor or fuel pump clogged, cracked, pinched, bent, broken, or missing.
. Fuel pump not working.
. Fuel line touching cylinder or head causing fuel to boil and vapor lock, repair by rerouting and wrapping line with convoluted tubing.
. Carburetor inlet clogged.
. Carburetor float or needle and seat stuck.
. Carburetor not venting properly overflow line or bowl fitting clogged, pinched, or bent.

first things first:
1) make sure that the kill for the magneto/coil is breaking contact( it is on the side of the mower,follow the cable down from the red bar)
2) gas to carburetor
3) spark to plug/s
4) gas to cylinder/s

pull plug and try starting mower, observe spark plug for spark and fuel coming out of cylinder/s. if spark no gas, then check to see if it getting to the carburetor, if it is then it is the float and seat in the carburetor and will need to be cleaned/replaced/rebuilt. Or just simple pour gas into the carburetor and try starting if it starts then it is the fuel line, carburetor. Hope this helped Tim

If the generator is an auto stop/start type for standby use, it would seem those solenoids are the reason why fuel isn't getting through. It would be a fairly sensible method of stopping the engine remotely.

An auto start/stop generator would need a battery for starting purposes, a battery that would presumably also provide current to energise those solenoids and allow fuel to flow.

I suggest you refer to the instruction manual in the first instance...

Sounds like it is not getting fuel to the carburetor and into the engine. Is there a shut-off? Fuel line blocked? Maybe the carburetor is so gummed up that it will not allow fuel to flow into the bowl and be pulled into the cylinders. May have to disassemble the carburetor and clean it.

There is a float inside the carburetor which functions to keep a level of fuel in reserve. When its full it shuts so that no more can get in. It can get stuck due to debris or corrosion. Repairing or replacing it may help you.