Motor is a 2002 Serial # 0T556067. Boat started to act up with difficulty starting during the summer and one morning felt sluggish out of the hole and at WOT would only get about 4800 RPM at 49MPH. Boat typically will run 60MPH at 5600RPM. Compression is 115 on all 6 cylinders. Took the boat to the dealer who thought it was a fuel starvation problem so after a $1,500 bill I took it to the lake and immediately had the same problem. Took it back to the dealer and they said they could not find a problem after testing everything. I talked to another marine shop and they thought it could be the coils so I swapped all 6 and ran her again this weekend with no change in performance. When accelerating it feels like it doesn't have the power it used to and can feel the engine surging or struggling at times. Frustrated to say the least and hoping someone can point me in the right direction on how to fix this problem. BTW, Motor was rebuilt 2 years ago.