I have 77 Carver 2566 w/ Merc
I have 77 Carver 2566 w/ Merc 228 on 350 block. Engine only has 50 or so hours on it but has been revving up and down especailly above 2500 rpms. The ranage is aroung 300/400 ie taching at 3000 revs up to around 3400 for a cuople of minutes and back down again. Can...