Briggs & Stratton 15.5 hp dies after it has run for about 1/2 hour

[Silviasil]

This is on an MTD Yard Machine Riding mower. Mdl 760. B&S Engine is 282H07-0334-E1 with a Nikki carburetor. It dies after the engine gets good and warmed up. It is still getting spark as the engine is winding down so I believe it is fuel related. It has the fuel shutoff solenoid screwed into the bowel of the carburetor. I suspect this solenoid.
Question: Is it normal for this solenoid body to get uncomfortably hot to the touch. I suspect that it is failing.
I had similar dying last summer and narrowed it to really fine “grit” down around the plunger and plunger spring that would not let the plunger fully retract. I cleaned it up and has worked fine until now. Thanks in advance for suggestions.
It appeared clean this time but I could barely hear it click until I cleaned all electrical connections and now I can even hear it click with my ear muffs on!

 

[Silviasil]

Solenoid part number is 596038. Resistance cold is about 42 ohms. Will try to get a reading when it is hot and when the mower has died

 

[Auto Doc's]

42 Ohms sounds like too much resistance to me.

I gave up fighting those pesky solenoids. I just cut the top of the pintle off and install a simple inline fuel shutoff. No more issues.

You have to be diligent and remember to cut the fuel off after using the rider and then cut it back on when it is time to use again.

Don't be alarmed if an occasional flame shoots out of the exhaust when the key is shut off. Shut the key off at low idle. That is why the solenoid is called an "after fire" solenoid. It shuts carburetor fuel flow down, so the engine momentum does not draw in fuel during shut down.

 

[sgkent]

make sure the fuel cap is not on so tight that the tank is acting non-vented. Also get a spark tester to see if you have spark when it dies.