Do you know how much time i need to run the engine beafore the ring take is place ? And on the first run i put oil in gaz and the seadoo missfire it is normal for the first run
Yes drain the tank and replace with only gasoline. Bleed the oil injection if you have not already.
Break in period is usually 10 to 12 hours run time. Never hold wide open and vary the throttle so the engine is not constantly a the same rpms.