Family has a 2001 90 3cyl on a 24' tritoon on a freshwater lake in Virginia. Has over 850 hours now. Motor always vibrates a bit between 1700-2100rpm,have replaced the rectifier once, the waterpump 3 or 4 times, fuel hose and bulb 2 or 3 times. Has never idled smoothly as a 88SPL Evinrude we had...