Rpm's drop while accelerating

[harv]

I started having a problem with my Switch V (340hp) with the rpm's dropping while accelerating. I can put the boat into gear from nuetral with no problems but if I start to accelerate beyond that, it seems normal for brief period of time and then the rpm's drop probably 500 or so. It does this both when pulling up a wakeboarder and also just idling back a little faster to get to the downed rider.

Once the rpm's drop, I continue to push the throttle forward until the rpm's come back up. The boat idles great and runs great after the inital rpm drop. Dealer had no clue when I talked to them over the phone last night.

Any suggestions?

[kko]

what year? what eng merc./marine power/pcm? how many hrs on it?

[Ruune]

could be a clogged or waterlogged fuel filter/separator.

[harv]

I just got back from the lake, this problem only occurs with perfect pass on.

I'll give P.P. a call tomorrow.

Thanks