Recognized nationwide for his fishing expertise, Capt. Dave Mistretta has spent more than 30 years as a big game saltwater guide in Indian Rocks Beach, Florida. His Dorado 40, Jaws Too, employs a 530 hp Yanmar 6CX-530 engine supplied by Mastry Engine Center. As one of the first to try out one of these engines, Mistretta easily logged over 2,200 hours of operation in just two years. When most boaters put an average of 100-200 hours a year on their engine, it can be hard to gather enough data to quickly determine its level of reliability.