I someone can help me or give me ideas on this issue I have a1987 Evinrude 90 hp I cleaned out carbs I got good compression on all they are about 120 that is good for an old motor it idles fine in the water etc. so I ran up and down a canal at around 4500 rpms for a good hour and out of no where the motor stop no it shut off like if someone turn off the key I took the cover off and checked the heads for overheat I was able to put my whole hand on the heads it was warm so I try a restart it will not the starter tried to spin the flywheel did not have the power I waited about 1 minute and tried it again and it turn on with no problems and I keep on going no miss fire etc ran fine back now the voltage was high it is charging about between 16 & 18 volt at 4500 RPMs can this cause my motor to shutdown?? thanks to all who can help me