2015 Fourwinns V275, Single Mercruiser 350MAG, 104 Hours, 2nd owner. Service Engine light just came on. Reduced throttle and listened, no alarms at all. Brought up RPMS without a problem and returned to the dock. Boat mechanic is 3 weeks out. Mercruiser factory says that with no alarms and the engine NOT going into Guardian, engine is fine and usable, alarm is emmissions related. Has anyone had this issue? I searched and found a software for reading the code from the engine but haven't made that leap yet. Does anyone have experience with the code reader from Rinda Diacom software?