bkhitchens
Seaman Apprentice
- Joined
- Apr 4, 2011
- Messages
- 40
I have a '94 278 with two OMC / Volvo 5.0 and OMC SX / VP drives. I haven't had it very long. When I get on plane it is almost uncontrollable with porpoising. I have the drives all the way down as the boat is in a slip and I leave them that way all of the time. My trim tabs rarely work, but even when both are up it still is erratic. It even seems as though it is most erratic in calmer water. What am I doing wrong?