Hmmm... Joe, thanks for the insight. I love short cut type easy CHEAP repairs like that, if that should be the case. Worth looking, I'll take a peek tonight. My tech told me idle control valve as well. Interesting to hear you did it x2 with no result. Did you have the same issue with the slight bog when revving, stalling after revving, and the throttle sticking wide open, etc. or what is just a rough idle?
'87 190E 2.3-16
'99 Arctic Cat ZR500