I recently installed a new binnacle and Morse redjacket cables to my 2002 Johnson 90hp. but wen I put the rpms up to 1500(out of gear and earmuffs on) the motor will steadily increase rpms by itself. It creeps up to 2k then 3k then rapidly tops out. I tried looking for any moving parts but noticed nothing...any more troubleshooting methods or ideas out there?