You don’t tell anything about the vessel itself......is it a factory built vessel with only 150 hours on the engine, or is it an older vessel that has been repowered with this engine and collected the 150 hours?
If it’s an OEM
installation I would do the basics as listed by SkipperPete and let it go at that. The engine is basically brand new.
But if this is an older
boat that has been repowered with an new engine,I would have an experienced technician look over the entire
installation, particularly from an engine systems perspective. That is, check the
exhaust system for backpressure, for adequate drop to the
water lift muffler, for adequate “gooseneck” height at the outlet. Check the seawater inlet system to the engine, the
fuel system for potential problems, the air inlet system into the engine room, the engine beds and alignment with propshaft,....as well as the basics as mentioned above.