My 250 G2 has started to lag coming out of the hole. I push the pedal to the floor engine goes to 1500 rpm for 8 to 10 sec then takes off normal. The other day running 3500 rmp engine shut down to 1500 rmp had to stop take out of gear then put in gear engine resumed normal operation. No codes?
If you are absolutely sure that the throttle is at dead idle when you start the motor - be super careful with a "Hotfoot" throttle - then you should take it to your dealer to have the motor, setup, and rigging inspected.