I have a new yanmar 1gm10 which is sea water cooled. The engine was run in last season and has about 60 hours on it. This season I have noticed quite a lot of steam coming out the exhaust when the engine is under high load. It doesn't look like the flow of water is restricted because I also see water coming out of the exhaust. The water is pretty hot. Apart from this the engine runs fine and starts perfectly first time. Is this steam normal? I didn't notice it last season but was not running the engine at full load.
Thanks Marek.
Thanks Marek.