rich idle
I have twin 572's in my 32 fountain, starboard motor has same problem as yours-running to rich and fouling plugs. Port motor runs like a dream. Both engines obviously are identical. Took the starboard 8896 apart 3 times and couldn'tfind anything wrong with it. 91 jets on all four corners and 3.5 power valves front and back - exactly as the port motor. Even had a few bracket racing buddies look at it and still couldn't find anything wrong. Frustration pushed me to a new 8896 which should be here by weeks end, hope it works!