14.5 HP Briggs won't stay running.

[t.crawford714]

I am going to put new gas in today. Unfortunately I don't have a new filter. What fuel pump? Aren't mowers just gravity fed?

 

[reynoldston]

One of the first things would put a new fuel filter on. you need a in line 1/4 in. low pressure fuel filter from any auto parts store, cheap insurance, change once a year. The fuel pump is next in line from the gas tank. It will have three hoses going to it, in gas, out gas, and a vacuum line. Back to the carburetor needle valve. You will have to remove the carburetor. turn upside down and remove bowl. under that you will see the float, by the float hinge you will see a valve under the float. as you turn the carburetor right side up this valve will move, if not then the needle valve is stock. carburetor right side up you should be able to blow air my mouth throught the carburetor fuel inlet and up side down you should not be able to blow air my mouth throught the fuel inlet and if this is the case your needle valve is working fine.

 

[t.crawford714]

The needle moves freely with the float and I can blow air in right side up but can't when it's upside down, any other ideas?

Anyone know what kind of spark plug I need for a Briggs 14.5 I/C Quiet? I cleaned the spark plug and it sparks more but I want to check to make sure it's the right one. It may not be burning hot enough to combust the fuel while it would burn the starting fluid.

 

[ILENGINE]

Do you have a fuel solenoid on the bottom of the carb bowl. If so does it click when you turn on the key. If not then it could be a bad solenoid or stuck plunger. If you don;t have a solenoid then you have a plugged main jet. Could be in the bowl nut, on the side of the emulsion tube inside the bowl, or could be in the nozzle that is screwed into the emulsion tube in the center of the carb under the bowl.

 

[reynoldston]

that part of it is good then, maybe float adjustment? is the float level when its up side down? Are you getting a good fuel flow to the carburetor? If it runs on starter fluid only its not getting gas. Have you removed the gas line from the carburetor and turn the mower over with the starter and see if you are getting a good fuel flow. Make sure you have a bottle or can ready to catch this fuel so you don't have a fire. Did you open your air adjustments 1 1/2 to 2 turns out for rough adjustment?

 

[t.crawford714]

If I don't have the fuel line hooked up on the carb it just flows out of the the line. Any ideas on the spark plug?

 

[reynoldston]

If I don't have the fuel line hooked up on the carb it just flows out of the the line. Any ideas on the spark plug?

A spark plug is cheap alone with new fuel filter. Take the old ones with you to any auto parts store and they will cross the numbers over for you. less then 10 dollars for the two parts That will ease your mine on that part of it. Just my though is if it runs on starter fluid it should run on gas which cancels out ever thing but fuel. It is hard for me to know what is what other then what you tell me. What you might call clean I might not ?? Does this have a fuel solenoid on the bottom of the carburetor and is it working??

 

[t.crawford714]

A spark plug is cheap alone with new fuel filter. Take the old ones with you to any auto parts store and they will cross the numbers over for you. less then 10 dollars for the two parts That will ease your mine on that part of it. Just my though is if it runs on starter fluid it should run on gas which cancels out ever thing but fuel. It is hard for me to know what is what other then what you tell me. What you might call clean I might not ?? Does this have a fuel solenoid on the bottom of the carburetor and is it working??

Would that be a little battery looking thing that screws in the bottom of the bowl? If it is, there's no wires going to it.

I should mention that it is a new filter and new gas before I started working on it.

 

[reynoldston]

Would that be a little battery looking thing that screws in the bottom of the bowl? If it is, there's no wires going to it.

I should mention that it is a new filter and new gas before I started working on it.

That little battery looking thing is called a anti dieseling solenoid. What could well be your problem. When your mower is running you have battery voltage to it opening a valve inside your carburetor and when you turn off your mower it closes so the mower won't keep running at a diesel. You should have a extra wire somewhere that goes to it with battery voltage when the key switch is turned on. Maybe the wire got broken off some how? This solenoid should make a clicking noise as your key switch is turned on and off.

 

[t.crawford714]

I'm not arguing but why on earth is it called an anti dieseling solenoid? It runs on unleaded 87 haha. I'll check to see if there's a wire that looks like it would touch it, because now that you say that it only passes through the bowl and screws into the carb