My port engine on my 26 regulator is smoking more and is burning a little more oil. We where offshore the other day and the engine died out at idle and when I started it back up it smoked real bad for 30-60 sec. then cleared up under load. When we got back to dock we fueled and when leaving the fuel dock it again smoked hard for 30-60 sec. and cleared up once we got going. Any idea what is causing this??