Daddyo
Guru
As some of you may know, in the spring of 2013 when I was moving our DeFever 48 with twin Lehman 120s from Marathon to Maine I noticed an increase of white smoke in the exhaust. The boat had seen little movement for a couple of months in the keys. Immediately after getting underway I noticed the smoke. On day two I filled two of the tanks with fresh fuel from a known supplier. There were minor changes each day with humidity being determined to be of major influence. We all know that usually white smoke means steam, ie water in the fuel. This didn't seem likely given the quality of the supplier. After getting fuel several additional times the smoke increased. When underway a few days ago I had two shut downs from overheating. After much effort to find the problem by removing the cooling system and bench checking it I could not find the smoking gun, until I looked inside the seastrainer (not an easy thing when underway). The seacock was full of mussels. The steam was from a lack of adequate waterflow.