D15 stops running?

So been wrestling with this issue since last fall.........hard time sorting it out.

So tractor will start and run.......backed it out and was allowing it to warm up while I hooked it to a mower.........while sitting there idling.......it coasts to a stop and dies. May or may not start again until it either cools down or rests. Sometimes full choke helps get it going......while warm?......but push in choke and it dies.

All that is with fuel tank showing 1/4 full. Dump in 5 gallons and all that goes away. Starts and runs normal. That tells me more fuel = more head pressure to force fuel down thru the hoses and filters........which seem to run fast or slow.......but run. But all fuel lines are new. Hoses, fuel filter, clean sediment bowl and screen and no sediment in the tank. Normally it runs a full stream. Normally I'd think as long as tank has fuel, it wold run. When it quit running today it was slightly downhill, so what fuel there was in there was over the drain. It was not empty.

Any chance something is off in the carb? Like a float or something?

Don't think there is a stand pipe in the tank. No sediment and no "bean" or whatever it is that accumulates in there to block the hole.

The fuel lines may "droop" an inch or so below the fuel fitting on the carb. This is same setup it has had since I took over and it never did this before.

The odd thing is when fuel gets down to about 1/4 tank.......it runs at idle......then just dies and will not start again until it cools down. But will then start again. That may be time to cool down or it may be time for fuel to fill carb bowl again. Something not right about a gas engine that when warm will start and run with choke, but dies when choke is off.

The little gremlins will drive you crazy.  I would take hose loose from carb, open sediment bowl petcock and drain tank into a gas can.  Then take sediment bowl assembly off, and check it over.  Also check tank for dirt.

Good Luck,

Bob

You have a fuel delivery issue somewhere there. I remember the story about the dead bumblebee floating around in the tank and every once in a while it would block the outlet to the sediment bowl and shut down the Tractor.  Wait a little, Tractor fires up and runs again for a short period of time and shuts off again.  Goofy stuff happens. And you wonder, how did that damn Bumblebee get in there!! 

Steve@B&B

I included a NAPA inline metal fuel filter between sediment bowl and carb. When you disconnect the fuel line, it runs a full stream. That has been on there since I took over stewardship and has never caused an issue before. Have baled hay with it running at RPM engine speed and never missed a lick.

Will look hard to see if there is something floating in fuel tank. Have looked before, but will look again. If nothing still, I"m considering pulling the carb to have it rebuilt or gone over. Did that about 6 years ago.

BTW, normal practice when I put her in the barn for any period of time is to shut off the fuel at the sediment bowl and let her run it dry. Stored with no fuel in carb.

The scenario of an inline fuel filter with a psi requirement that might prevent flow when tank is low, but works when tank is 1/4 tank or more makes sense and is consistent with the behavior. Don't remember seeing any specs to outline psi or none on the box the filter came in.......but may still have that box......or one like it.

If there is an option for gravity flow only inline filter, can try that.  As far as I know, fill cap is original. But can try that too. Almost certain tank is clean and free of any debris or sediment. That was the first thing I checked.

If something off in the carb, would think it would never run right.