[garygroves]

Eyebobber: When was the last time you checked your injectors? (admittedly I''m not familiar with your engine, but I am with Yanmars) White smoke is unburnt fuel caused by poor combustion. Possible causes may be poor injector spray or low compression. If it was steam, this is usually caused by lack of raw water cooling flow. Smoke tends to linger in the air while steam dissapers more quickly.