Yamaha sluggish acceleration

[Hogfanx]

I have a 2009 Yamaha 25ESH. When I hit the throttle the engine revs but it takes a second or 2 until the 2nd cylinder hits. It will almost throw you out of the boat. It will run fine until you slow down & try to accelerate again. Any ideas on this? I just changed the plugs a few weeks ago.

 

[99yam40]

wild guess is eithr the fuel pump leaking fuel into crankcase or pilot jet/passages .
take the carbs apart and pump to see if there is a problem you can see