Have spent quite a bit of money on this thing during the past year. Used a respectable mechanic. Only thing not done is replace the thermostats. He noted one side runs about 10 degrees hotter than the other. What would be the symptoms from not replacing the thermostats? THE SYMPTOMS ARE... one day the motor runs great. Three days later engine starts right up an idles to the end of the no wake area. Begin the throttle and the engine starts to miss, hesitate and cannot get on plane. Stop, put the engine in neutral then reverse and rev the motor, much like you would if you were clearing hydrilla off the prop. Back to forward and the boat get on plane. Ser#0g900175. Building a strong hate for this thing. I do think this occurs after the engine/weather warm up during the day.