And the Yamaha F150 is the easiest of all 4 stroke engines to diagnose and fix whenever there is a problem. It also helps that the engine with very few modifications has been on the market since 2006.
Boat dealers never seem to have enough trained mechanics. Most have a 6 month selling season, and half the year mechanics spend assembling new boats for sale. They then have to squeeze a full years' repairs into 6 months. If a dealer cannot fix my boat in 2 weeks, it's going elsewhere. My dealer fortunately gives 1-2 day service because he only sells pontoons and has very few retail repairs--mainly just sets boats up.