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H will run a day after fuel shut off until tractor quits.

A

Alan in VA

Member
Stupid question probably, but I turn off my H by shutting off the valve on the strainer bowl. The next day it will start and run for maybe ten seconds eventhough the fuel valve is still closed. Does this indicate that the valve is leaking?
Thanks for your help. Alan
 
When it runs for those 10 seconds, it"s running on the fuel in the float bowl of the carb. Once the float bowl empties out, it quits running.

My M does the same thing when I get in a hurry and forget to open the shutoff valve.
 
My "guess" is it is running off of fuel that has expanded in the sediment bowl and ran down the fuel line into the carb due to heat off of the engine. (WELL ater you initially shut the valve off at the tank to "kill" the engine.)

Mine does the same thing . I TOO kill my engine by shutting off the valve and running it out of fuel. But the next morning I can pull the starter rod and it will take off running for several seconds.
 
I don't know how many times I have fired up the H or M, pull out of the barn then dies from lack of gas.
 
The residual gas in the fuel line runs down after the engine has died; there will be enough fuel in the bowl to get the engine started the next day.
 
Thanks for the comments. Makes sense to me. I just don't know enough about carburetors, but am learning.
Alan
 
If you want to test everyone's theory, try this.
1) Shut it off your usual way, letting it starve out after shutting the fuel off.
2) Go out the next day and start it without opening the fuel. Let it run the 10 seconds or so until it quits. Leave it that way.
3) Go out the next day and try again. If it runs for another 10 seconds, you probably have a leaking shut-off valve. If not, it was running on residual fuel in the system.
 
That is normal. When the engine shuts down after you turn the gas off there is still a little bit of gas in the lines and carb. So when you try to restart it it fires on that small amount of gas that is still in the carb. Just to prove it try this. After you shut the engine down let it sit say an hour then go back and pull the carb drain plug and you will find the carb has some gas in it
 
I didn"t know that how you are suspose to do it. Our H has a mag and no kill switch so I usally just pull out the choke to kill the engine and turn the gas off. Most likely will start next time without choking at all. I suspose letting it run out of gas is fine but I was always afraid maybe of going away with the tractor running and it could run for hours if the gas was slightly on yet.
cleddy
 
Choking it to kill it is not a good thing to be doing. It can lead to gas in the oil and also washing down of the cylinder so you have a dry start which is hard on the rings. To shut one down like you have you should turn the gas off and wait to minute or 2 for it to die just to be sure it does in fact die. That is how I have to shut down one tractor I have but it is not a red one LOL
 
I do not know why you want to run the carb dry each time you use the tractor. Is the ignition switch non-functional?
Just idle the engine down, put the transmission in 5th gear, step on the brakes, and let out the clutch? Then shut off the gas at the sediment bowl.
Your tractor will be ready to go next time and you can drive for about a minute before remembering to turn the gas back on!
 
I like Jim's suggestion to try the tractor two days in a row without opening the valve to see if the valve is leaking. Thanks, Jim.
As for the ignition switch not shutting off the engine, it does. I just thought that Farmall recommeded the tractor be starved for fuel before turning off the ignition. I could easily be wrong.
 
If you intend to leave the tractor unused for more than 2 months, I would shut it off and let it die as described. Not every day, it just does nothing for it at all. Jim
 
+1 on having the kill switch operational.
If you ever have a situation where you need to shut the tractor off immediately, choking can be un-reliable.
Pretty simple, use a two prong push pull switch, run one wire from the mag to the switch, the other side to ground. Pull out to start, push in to kill.
 
shouldn't that be pull to kill and push for run? Most conventional two prong switches are closed circuit when pulled out. IH MAGNETO switches have one prong and ground to the tractor when pushed IN.
 
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