Bad ignition module , plugged fuel cap vent , restricted fuel filter , dirty air filter .

Try running it with the fuel cap slightly loose, or off. If it runs fine, you have a bad fuel cap. You can try cleaning it, or replacing it. If not, what ssewalk1 said.

It snowed. Sitting in shed.

Could also be a bowl vent that is plugging. Depends on what engine I'd guess. Maybe someone will swipe it by spring and it will be no problem at all! :)

In the old days (breaker points and condenser ) that was a sign of condenser gone bad. If it has an electronic ignition then I don't know.

I bought a Sears mower about 5 yrs ago. It kept stalling like that. On the second warranty return, the service guy showed me something. This mower has no external fuel filter, and there is none in the bowl like you would find on the end of a flexible hose like they use in chainsaws. The line from bowl up to the carb is a rigid brass pipe. So, grass and debris get into the gas tank, find their way into the carb bowl, and when a piece gets sucked up into that tube, it blocks the flow and the engine stalls. Wait a couple minutes and sometimes it will drain back out and it restarts. Or not.

I cut into the rubber fuel line between the tank and the bowl and inserted a $1.49 fuel filter with a couple of hose clamps. No more stalling.

The fact that any manufacturer would be so cheap as to leave out a simple fuel filter on a machine that is intended to work in a dusty, debris-filled environment, just to cut $1 off the cost, is beyond me. Especially when the warranty returns will eat up the profit and more. Consumers always going for the cheapest option have brought it upon themselves, too.

Actually, it’s a lawn/leaf vacuum. It ran ok for 15 min yesterday. It did not stall. It’s 40f here. I don’t like to suck up leaves when they are wet and semi frozen. Normally I take 4 trailers of leaves to dump. But neighbor is storing his trailer already. So I got this lawn vac. I hate leaves. And trees

Ok, used it for 1 hr just now. not A single stall

its a walk behind leaf vac mulcher

its a leaf mulcher?

Its a mower , then its a leaf vac ??

You mean , it's a lawnmower with regular cut & discharge or cut & mulch or cut & bag ability . Anyhow it would appear , bad gas may have caused your temporary condition , some fuel conditioner may be prudent added to your fuel prior to storage , so your problem does not return in the spring !

Cool machine.

I typically run all the fuel out of my mower at the end of the season. When mowing is done, I dump out the remaining gas (usually only a cupful, if it's more I catch it in a disposable pie pan and reuse or discard it). Then start it and run till it stalls. That will prevent any corrosion, deterioration of seals, separation of water, varnishing or jellylike gunk setting out, etc. If you leave fuel in it, leave a full tank and put some STABIL or equivalent in it.

I see there is a rear Discharge chute That blows debris to the side. Would it be a bad idea to blow the clippings to the side and let them lay? Normally I grind up leaves with my rider. Then I pic up leftover leaves with this lawn vac. Well, this I the first year I’ve done it. Yard looks pretty good but I dumped refuse into my garden and I have to deal with it next spring. The chute is $55. For a hunk of molded plastic. Grr.