[dave948]

I don't have a gasser 4 stroke but my husky will do the fart stall. One of the main reasons I went back to the 2 strokes.

Check the valves, run good gas and I'm sure your FI is doing a good job but if you can alter your fuel map that may help. Keep the heat down in the motor as well, mine does it a lot more when going slow and beating on the clutch.

Good throttle control seems to be the best and cheapest fix.