My boat has a 27hp yanmar hmf and yesterday when I went out I noticed there was steam in the exhaust after the engine ran for about 5 minutes. The engine started and ran fine. The alarm goes off and there is normal water flow coming out of the exhaust at first. I only ran it long enough to get back on the mooring. The engine looked fine visually and the oil was fine. Any ideas?
Last edited by Sixbrothers; 07-26-2009 at 10:19 AM.