My 200's are on a cat as well and I have the same issue. I feel that they should be higher but there is nothing I can do about the height. I have raised them up to get the cavitation plates up to the surface but I can hear them cavitate sometimes, so may drop them back down a hole. I trim the engines up when I am drifting and I slow one down at a time when stopping to keep the water from rushing up the back of them.
I never noticed any fuel burn improvement after changing the 02 sensors. I suppose it could be possible the sensors went bad after one trip, but I hope that is not the case for what they cost. Are you running the updated sensors or the old style? My engines are '03's so they had the old ones.
I never noticed any fuel burn improvement after changing the 02 sensors. I suppose it could be possible the sensors went bad after one trip, but I hope that is not the case for what they cost. Are you running the updated sensors or the old style? My engines are '03's so they had the old ones.