This is the same motor I swapped to EFI. Have since put everything back to orignal as I kept having issues. Motor has the same issue with carbs/efi.
2004 200hp 200XL Carb Serial # OT946483
Motor starts and idles great. Will blast off and run to WOT the first run no problem. When coming off WOT the motor stumbles at 3800rpm, tach instantly shows 2000rpm, then the motor dies.
It will instantly fire right back up then bogs trying to come on plane. Sometimes it will push thru and comes up running to wide open strong. I have checked spark when this happens and show all 6 firing with a timing light at idle. Also good resistance on the trigger coils hot.
Have tried different flywheel, stator, trigger, coils, and voltage regulators since I had them from another motor. Coils seem to be in spec with dva checks. Have also inspected exhaust tuner, rebuilt pulse pump, different plugs, and portable tank.
The control modules are different carb to efi so I have a hard believing that's my problem also.
As always thanks for any input other than unbolting this thing in 100' of water.