WOT I see ~ 2750 rpm (survey said indicated is 300 lower than actual) and 6.5 kts. It has always been this way. After 3 months of no use, WOT is 2350 rpm and 4.4 kts. It continues to start and operate as normal, but just not seeing the power. No smoke, easy start in 55F temps, smooth idle and transistion to WOT. Being in mid Chesapeak, we don't see that much foweling, and after 4 hours of crusing, the ablative paint should have done its job, and WOT crusing speed did increase 0.3 kts. Initially thinking partially cloged fuel filters, I changed them both. No change to the performance. Any thoughts on next items to check? Thanks for the guideance.
Edit - just found this thread and will start with these suggestions:
S/V "GoodwiII" #759
1987 C36 MKI TR/WK M25XP
Moored: Deale, MD