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.
"There is never just one thing wrong with a boat";
-- Travis McGee, main character in a book series by John D. McDonald
The factory recommends that a properly trained technician service your Johnson or Evinrude outboard motor. Should you elect to perform repairs yourself, use caution, common sense, and observe safety procedures in the vicinity of flammable liquids, around moving parts, near high-temperature components, and working with electrical or ignition systems.
The information offered here is only general in nature and should not be construed as complete factory approved procedures, techniques, or specifications. Always use the proper service manual for your motor, up-to-date service literature, the correct tools, and have an understanding of how to proceed with troubleshooting and repair methods. If you are unsure or uncomfortable with a procedure, a situation, or a technique, enlist the services of a factory trained technician.