Question for you mechanical folks. New pontoon this year with a 225 4 strke yamaha on it. Recently when I would start the engine after it had been sitting for a few days I would notice some black oil in the water around the engine. It appeard to be coming out of the back just above the water line. It would stop after about 30 seconds. Runs just fine after that. Is this just some sort of breather or could it be something more serious. The engine only has 50 hours and had the first service done at 20 hours. Thanks
