I have a 2004 evinrude 175 DI and this week it started smoking after a short run up the lake. No smoke at idle before taking off. Then when we come to a stop and at idle it is smoking. Not alot, but never smoked before. Also it seemed to sound louder than normal. Other than those two things it ran fine. I added seafoam before fueling and I changed to XD100 oil this year. should I be concerned? Closest dealer and shop is an hour plus drive. thanks