2018 f25lwhc stalling

[Rocko1024]

I got a 2018 f25lwhc efi motor that stalls when brought back to idle quickly. Already replaced the throttle body assembly,IAC valve, and swapped ecm's with a new engine and the problem is still there. Engine has 250hrs on it and no codes showing on yds. All fuel filters have been changed as well as spark plugs and oils. Any body run into a similar issue with these new 25's ?

[DennisG01]

I can't help directly, but indirectly... That motor would still be under warranty. Why are you buying/throwing parts at it hoping for a fix? Get your dealer involved and let them go through a diagnostic procedure to figure it out.

[Rocko1024]

Sorry should have mentioned in original post the motor is at the dealership. Those parts were replaced on recommendations from Yamaha based on run files sent to them. Just hoping someone else has had this issue and what they found for a cure. Thanks

[DennisG01]

Ah, gotcha. Sometimes the techs/Mother Yamaha get stumped, too! Watch... it'll be something simple like a flaky neutral safety switch or shift interrupt switch... if that engine uses those things, of course - just talking outloud there.