I have a 2016 4 stroke 25 h/p Suzuki O/b. Sometimes on starting, the engine will emit a small cloud of smoke. It seems to happen more often after the engine was idling for a period prior to shutting off. I think I read somewhere that could be caused by build up of oil in the emission system because of extended idling. No change in engine oil level has been seen and the engine runs extremely well otherwise. Have talked to Suzuki authorized repair centers and they don't seem to know anything about (or don't care) what could be causing this smoking condition. Has anyone else experienced this or care to comment???