i have a 12hp briggs model 281707 type 0125 on my simplicity yard tractor.
it will run strong for a few minutes then it dies . it seems as if it is choking
just before it dies . i try to give it more throttle but it just dies. it restarts then runs for a while than it dies. does anyone have any ideas? rusty

check for spark right after it stops, and when you take plugout, is it soaked in gas/

i have the same problem mine has spark right after it stops and compression. what does it mean if it is soaked in gas?

is the plug just black/gray when you take it off or is it wet with gas? if its wet then its flooding

my plug is dry but there is gas standing in the carb before i tried to start it.i put an inline shut off valve between tank and carb just before the filter.i then started it and let it run for about a half hour .while it was running i poured a can of gumout thru the carb .it didn't die and seems to idle better .i will give it a harder trial tommorrow when i attempt to mow with it