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Fuel supply slow

B

bsmart10

Member
My friend has an old Farmall H that is barely trickling gas into the sediment bowl. Not enough flow to keep the tractor running. We removed the bowl screen, but still not enough flow to keep it running.
What is in the tank bottom outlet that could restrict flow?
How do we fix it if we cant get the tank off the mounts...frozen mounting bolts. Thanks
 
You can blow air back up the fuel line. Any small bits of rust and dirt will get blown back into the tank. That will get you going again, but if they are still in there, eventually they they will return and clog again.
 
Unscrew the sediment bowl assembly from the tank. Then the garbage will flow! Then you can do a good job of flushing the tank, and clean the inlet neck of the bowl assembly good.
 
Depends on how trashy the tank is.

There should be a screen standing up on the fitting that goes in the bottom of the tank. It is probably gone and letting rust/trash fill in the fitting.

Try taking the fitting out, clean it best you can and replace the screen.

Eventually the tank will have to come off and be cleaned or replaced. Be gentle with the fitting or it may start leaking or twist out!
 
On the old Farmall super c , I removed the sediment bowl and ran a undersized clearance drill thru the hole to remove the the white crust over deposits.
After clean threads with tap if necessary , Use some permatex thread sealer when u installed to seal it .
 
Take a GOOD flashlight and look down through the fill hole and see what you are up against, meaning how much crud is in there around the outlet hole. If there is quite a bit of gas in it go to a hardware store and get a nice flexible hose that you can hold up against the outlet to direct it in a bucket(s). The bottom hole is 3/8 female pipe. Probably want some latex gloves
To do this. If the gas does not have a lot of floating debris in it you can just let settle half a day, strain it through a cloth and use it.
 
I blew air from carb back into tank. I blew crap in gas line back into bowl.
The 90 elbow at carb has a screen too. Remove elbow and clean it.
 
There is all kinds of junk that gets into a gas tank. The tank sometimes rusts and whenever you fill it if the nozzle or funnel isn't clean you add to the junk I have one I have to blow compressed air into the fuel line toward the gas tank from time to time to push the junk out of the way. Someday I will remove the gas tank and flush it out.
 
I had a kernel of corn down in the neck of the sediment bowl on a combine one time. It let enough gas through to run just fine until it got under load, then it started starving out. Dad had a pop sickle stick in the bottom of the tank of his Oliver 66 one time. It would slide over the hole and starve it for gas, then move off.
 
I do not think a Farmall H originally had a screen on the top of the sediment bowl on the fuel tank side. YT carries them as aftermarket items .. see link.. I think it may minor drilling to the top of the sediment bowl fitting for them to fit.
YT tank screen
 
Take a 3/8" rubber hose about a foot long stick it over the little nubbin that sticks down into the sediment bowl and blow hard into the hose with your mouth. If you hear bubbles in the gas tank you have freed it up. get your mouthy away from the hose after you stop blowing for obvious reasons. This will get you going until the next time it plugs or until you have time to flush the tank.
 
I had a grasshopper leg in a gas tank that nearly drove me nuts before I found it.
 
(quoted from post at 10:33:05 06/01/21) Take a 3/8" rubber hose about a foot long stick it over the little nubbin that sticks down into the sediment bowl and blow hard into the hose with your mouth. If you hear bubbles in the gas tank you have freed it up. get your mouthy away from the hose after you stop blowing for obvious reasons. This will get you going until the next time it plugs or until you have time to flush the tank.
Click to expand...

Thanks for the suggestions. Ill be implementing one or more of them.
 
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