I have had a 270 for three years, my first boat. Next to no problems with it, but I don't do many hours. Yanmar 4LHA engine with a Bravo 2X outdrive. The engine is cooled via heat exchangers from water that is sucked through the outdrive by an engine mounted pump in the normal way.
The question I would like to ask is:- is it normal to not have a water strainer or filter of any description? In my boat a pipe runs straight from the outdrive, through some connectors and into the pump. I can see no evidence there ever was any sort of strainer. Your comments would be appreciated.