Seem's to run fine some times, then just looses power. Im running a 115 spl Evinrude the motor tag said's that its a 1997 model conformed to a 1998. all i see on tag is model E115tslecm The serial# is GO4414067 The motor has been running 5000 rpm then jumped to 6800. Kind of scarry! then went back to running 5000 rpm Can't find out why! 