Hi guys. I have a 1976 bayliner liberty 2150 hard top (aq170/280). I have put a lot into it and have been using it for the last 7 years or so. Got it out this year and really was not having any issues. I could get on plane and go 25mph with 4200 rpms. recently though, i have been having problems. i cant go past half throttle (3000rpms) with out it sputtering. Im noticing the temp gage is hotter than i remember. I changed my fuel separator and that didnt seem to help. I adjusted my timing (rotated my distributor) and that didnt help. I am noticing a lot of white smoke coming out of the hole in the valve cover when i took off the air filter or spark arrester (whatever that thing is called). I am also noticing a lot of oil around the carberators (im assuming its coming from that rubber thing sticking out of the valve cover). I also am noticing white smoke coming from the dipstick hole. I am pretty sure thats not supposed to do that. it idles fine and in neutral, the engine revs great. we pulled each plug wire while in idle and it sounds like they all are atleast firing. The back of my boat is not black like it would be if unspent fuel was going out the exhaust. I think its probably just old, tired and needs to be rebuilt but my brother thinks it may be something simple. any ideas would be greatly appreciated.