Fixed Leaf Blower - Maybe Not . . .

I had previously posted a topic (Plugged Blower Carburetor) regarding a Ryobi leaf blower I have, that had worked very reliably up until fairly recently, when it started leaking gasoline and wouldn't start. I managed to fix the gasoline leak problem, but then the carburetor developed an apparent plug in the inlet to the carburetor, which I managed to fix with the purchase of a very cost-effective replacement of the carburetor.

The engine on the leaf blower had been working fine for a couple of times, and just all of a sudden it's having a problem. The engine will prime and start with very little trouble. It will throttle up and run fine for 2-3 minutes, and then the engine will gradually seem to lose power, and then stop. Then it will not restart unless it sits for 5-10 minutes - and then it will start all over again, and stall and quit.

Let's eliminate some issues: yes, it is getting gas, there's no plugging in the fuel lines, the gas/oil mixture is fine, etc.). I can't imagine that after the engine gets warm that that is causing a problem (but maybe . . .). I notice that when the choke is partially set, the engine seems to run longer without stalling, although at that setting, you can't coax the maximum engine RPM and blowing power.

Any suggestions (or just good guesses) about what might be the problem, based on what I've described? Pose a question or two, if I've left out something relevant that might help with the diagnostic. Thanks!